Future Technology Devices International Limited (FTDI)
Unit 1, 2 Seaward Place, Glasgow G41 1HH, United Kingdom
Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758
E-Mail (Support): support1@ftdichip.com Web: http://www.ftdichip.com
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documen tation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminary
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41
1HH, United Kingdom. Scotland Registered Number: SC136640
Copyright © 2010 Future Technology Devices International Limited
Future Technology Devices International Ltd
TTL-232R
TTL to USB Serial Converter Range of
Cables
Datasheet
Document Reference No.: FT_000054
Version 2.02
Issue Date: 2010-09-02
Copyright © 2010 Future Technology Devices International Limited 1
Document Reference No.: FT_000054
TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
Clearance No.: FTDI# 53
1 Description
The TTL-232R cables are a family of USB to TTL serial UART converter cables incorporating FTDI‟s
FT232RQ USB to Serial UART interface IC device which handles all the USB signalling and protocols. The
cables provide a fast, simple way to connect devices with a TTL level serial interface to USB.
Each TTL-232R cable contains a small internal electronic circuit board, utilising the FT232R, which is
encapsulated into the USB connector end of the cable. The FT232R datasheet, DS_FT232R, is available at
http://www.ftdichip.com. The other end of the cable comes with a selection of different connectors
supporting various applications – see Table 1.1
Cables are FCC, CE, RoHS compliant and are available at TTL levels of +5V and +3.3V.
Cables are available with either a 6-way SIL,0.1” pitch connector, a 3.5mm Audio Jack, an 8 way, keyed
2mm pitch connector (intended for use with VMUSIC2 or VDRIVE2) or bare, tinned wire ended
connections (see Table 1.1)
The USB side of the cable is USB powered and USB 2.0 full speed compatible. Each cable is 1.8m long
and supports a data transfer rate up to 3 Mbaud. Each cable supports the FTDIChip-ID™, with a unique
USB serial number programmed into the FT232R. This feature can be used to create a security or
password protected file transfer access using the cable. Further information and examples on this feature
are available at http://www.ftdichip.com under FTDIChip-ID Projects.
The TTL-232R cables require USB drivers, available free from http://www.ftdichip.com, which are
used to make the FT232R in the cable appear as a virtual COM port (VCP). This then allows the user to
communicate with the USB interface via a standard PC serial emulation port (for example TTY). Another
FTDI USB driver, the D2XX driver, can also be used with application software to directly access the
FT232R on the cable though a DLL. This is illustrated in the Figure 1.1
VCP
TTY
USB
TTL-232R
Virtual COM Port
Software application access to USB via D2XX
USB
TTY
D2XX
DLL
Wire Ended
3mm Audio Jack
6 way, 0.1" Single In Line connector
8 way, Keyed,2mm, Single In Line
connector
Various Connector
Options
Wire Ended
3mm Audio Jack
6 way, 0.1" Single In Line connector
Various Connector
Options
8 way, Keyed,2mm, Single In Line
connector
Figure 1.1 Using the TTL-232R Cable
Copyright © 2010 Future Technology Devices International Limited 2
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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1.1 Available Cables and Part Numbers
The following Table 1.1 gives details of the available TTL-232R cables.
Part Number
Description
End Connector*
Cable details
TTL-232R-5V**
USB to UART cable with +5V TTL level
UART signals.
6 pin SIL, 0.1” pitch
6 core, UL2464
24 AWG,
diam=5mm
TTL-232R-3V3
USB to UART cable with +3.3V TTL level
UART signals.
6 pin SIL, 0.1” pitch
6 core, UL2464
24 AWG,
diam=5mm
TTL-232R-5V-
WE**
USB to UART cable with +5V TTL level
UART signals.
Wire Ended (no
connector)
6 core, UL2464
24 AWG,
diam=5mm
TTL-232R-3V3-
WE
USB to UART cable with +3.3V TTL level
UART signals.
Wire Ended (no
connector)
6 core, UL2464
24 AWG,
diam=5mm
TTL-232R-5V-
AJ**
USB to UART cable with +5V TTL level
UART signals.
3.5mm Audio Jack
2 core and spiral,
24 AWG
diam=5mm
TTL-232R-3V3-
AJ
USB to UART cable with +3.3V TTL level
UART signals.
3.5mm Audio Jack
2 core and spiral,
24 AWG
diam=5mm
TTL-232R-3V3-
2mm
USB to UART cable with +3.3V TTL level
UART signals.
8 way, keyed, 2mm
connector for use
with FTDI VDRIVE2
or VMUSIC2 modules
7 core, UL2464
26 AWG,
diam=5mm
Table 1.1 TTL-232R Cables Descriptions and Part Numbers
* FTDI supports customised end connector designs. For more information, please contact FTDI Sales Team
(sales1@ftdichip.com)
** These cables are identical to cables which do not have the “5V” in the part number. The 5V was added to the part
number for clarity.
Copyright © 2010 Future Technology Devices International Limited 3
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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1.2 Certifications
FTDI TTL-232R range of cables are fully RoHs compliant as well as CE and FCC certified (with the
exception of the TTL-232R-XX-WE cables which have not yet completed FCC and CE testing).
1.3 USB Compliant
The TTL-232R cables are fully compliant with the USB 2.0 specification.
Copyright © 2010 Future Technology Devices International Limited 4
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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Table of Contents
1 Description ..................................................................................... 1
1.1 Available Cables and Part Numbers ............................................................... 2
1.2 Certifications ................................................................................................. 3
1.3 USB Compliant .............................................................................................. 3
The TTL-232R cables are fully compliant with the USB 2.0 specification. ................ 3
2 Typical Applications ........................................................................ 6
2.1 Driver Support .............................................................................................. 6
2.2 Features ........................................................................................................ 7
3 Features of FT232R applicable toTTL-232R Cables ......................... 8
4 TTL-232R-5V and TTL-232R-3V3 Cables ....................................... 10
4.1 TTL-232R-5V, TTL-232R-3V3 Connector Pin Out and Mechanical details .... 10
4.2 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions ........................ 10
4.3 TTL-232R-5V and TTL-232R-3V3 Electrical Parameters ............................... 11
4.3.1 TTL-232R-5V Electrical Parameters ............................................................ 11
4.3.2 TTL-232R-3V3 Electrical Parameters .......................................................... 11
5 TTL-232R-5V-AJ and TTL-232R-3V3-AJ ........................................ 13
5.1 TTL-232R-5V-AJ, TTL-232R-3V3-AJ Connector Pin Out and Mechanical
details ................................................................................................................... 13
5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions .............. 14
5.3 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Electrical Parameters ..................... 14
5.3.1 TTL-232R-5V-AJ Electrical Parameters ........................................................ 14
5.3.2 TTL-232R-3V3-AJ Electrical Parameters ...................................................... 15
6 TTL-232R-5V-WE and TTL-232R-3V3-WE Cables .......................... 16
6.1 TTL-232R-5V-WE, TTL-232R-3V3-WE Connections and Mechanical Details 16
6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions ............ 16
6.3 TTL-232R-5V-WE and TTL-232R-3V3-WE Electrical Parameters .................. 16
6.3.1 TTL-232R-5V-WE Electrical Parameters ...................................................... 17
6.3.2 TTL-232R-3V3-WE Electrical Parameters .................................................... 17
7 TTL-232R-3V3-2mm Cables .......................................................... 18
7.1 TTL-232R-3V3-2mm Connector Pin Out and Mechanical details .................. 18
7.2 TTL-232R-3V3-2mm Cable Signal Descriptions ........................................... 19
7.3 TTL-232R-3V3-2mm Electrical Parameters .................................................. 19
8 Cable PCB Circuit Schematic ......................................................... 20
9 Contact Information ..................................................................... 21
Appendix A - Cable EEPROM Configuration ......................................... 22
Appendix B - List of Figures and Tables.............................................. 24
Copyright © 2010 Future Technology Devices International Limited 6
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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2 Typical Applications
USB to Serial TTL Level Converter
Upgrading Legacy Peripherals to USB
Interface Microcontroller UART or I/O to USB
Interface FPGA / PLD to USB
Interface to FTDI VDRIVE2 or VMUSIC2
modules.
Replace MAX232 type level shifters allowing for
direct connection of products to PC via USB
USB Instrumentation PC interface
USB Industrial Control
USB Software / Hardware Encryption Dongles
2.1 Driver Support
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
Royalty free D2XX Direct Drivers
(USB Drivers + DLL S/W Interface)
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Linux 2.4 and greater
The drivers listed above are all available to download for free from www.ftdichip.com. Various 3rd
Party Drivers are also available for various other operating systems - see www.ftdichip.com for details.
Copyright © 2010 Future Technology Devices International Limited 7
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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2.2 Features
TTL-232R Converter Cable provides a USB to
TTL Serial interface with various end
connectors.
On board FT232RQ provides single chip USB to
asynchronous serial data transfer interface.
Entire USB protocol handled by the electronics
in the cable USB.
Connect directly to a microcontroller UART or
I/O pins.
UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /
no parity.
Fully assisted hardware (RTS#/CTS#) or X-On
/ X-Off software handshaking.
Data transfer rates from 300 baud to 3 Mbaud
at TTL levels.
Internal EEPROM with user writeable area.
5V CMOS drive outputs and 5V safe TTL inputs
makes the TTL-232R easy to interface to 5V
MCU‟s.
FTDI‟s royalty-free VCP allow for
communication as a standard emulated COM
port and D2XX „direct‟ drivers provide DLL
application programming interface.
Support for FT232R FTDIChip-ID™ feature for
improved security.
+5V or +3.3V output allows external logic to be
powered from the USB port.
6 way outputs provide Tx, Rx, RTS#, CTS#,
VCC and GND (except Audio Jack which
provides only TX,RX and GND).
8 way, keyed connector to support FTDI
VDRIVE2 and VMUSIC2.
3 way Audio Jack connector provides Tx, Rx
and GND.
Low USB bandwidth consumption.
UHCI / OHCI / EHCI host controller compatible.
USB 2.0 Full Speed compatible.
-40°C to +85°C operating temperature range.
Cable length is 1.80m (6 feet).
FCC and CE compliant.
Custom versions also available (subject to
MOQ).
Copyright © 2010 Future Technology Devices International Limited 8
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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3 Features of FT232R applicable toTTL-232R Cables
The TTL-232R cables use FTDI‟s FT232RQ USB to serial IC device. This section summarises the key
features of the FT232RQ which apply to the TTL-232R USB to serial TTL converter cables. For further
details, and a full features and enhancements description consult the FT232R datasheet, this is available
from www.ftdichip.com.
Internal EEPROM. The internal EEPROM in each cable is used to store USB Vendor ID (VID), Product ID
(PID), device serial number, product description string and various other USB configuration descriptors.
Each cable is supplied with the internal EEPROM pre-programmed as described in Contact Information
Head Office – Glasgow, UK
Future Technology Devices International Limited
Unit 1, 2 Seaward Place,
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758
E-mail (Sales) sales1@ftdichip.com
E-mail (Support) support1@ftdichip.com
E-mail (General Enquiries) admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Web Shop URL http://www.ftdichip.com
Branch Office – Taipei, Taiwan
Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan , R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8751 9737
E-mail (Sales) tw.sales1@ftdichip.com
E-mail (Support) tw.support1@ftdichip.com
E-mail (General Enquiries) tw.admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Branch Office – Hillsboro, Oregon, USA
Future Technology Devices International Limited (USA)
7235 NW Evergreen Parkway, Suite 600
Hillsboro, OR 97123-5803
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-Mail (Sales)
us.sales@ftdichip.com
E-Mail (Support)
us.support@ftdichip.com
E-Mail (General Enquiries)
us.admin@ftdichip.com
Web Site URL
http://www.ftdichip.com
Branch Office – Shanghai, China
Future Technology Devices International Limited (China)
Room 408, 317 Xianxia Road,
ChangNing District,
ShangHai, China
Tel: +86 (21) 62351596
Fax: +86(21) 62351595
E-Mail (Sales): cn.sales@ftdichip.com
Copyright © 2010 Future Technology Devices International Limited 9
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TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
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E-Mail (Support): cn.support@ftdichip.com
E-Mail (General Enquiries): cn.admin1@ftdichip.com
Web Site URL: http://www.ftdichip.com
Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and
sales representative(s) in your country.
Appendix A - Cable EEPROM Configuration. A user area of the internal EEPROM is available to system
designers to allow storing additional data. The internal EEPROM descriptors can be programmed in circuit,
over USB without any additional voltage requirement. It can be programmed using the FTDI utility
software called FT_PROG, which can be downloaded from FTDI Utilities on the FTDI website
(www.ftdichip.com).
Lower Operating and Suspend Current. The FT232R has a low 15mA operating supply current and a
very low USB suspend current of approximately 70μA. (Note that during suspend mode, the current
drawn by application should not exceed 2.5mA to remain USB compliant)
Low USB Bandwidth Consumption. The USB interface of the FT232R, and therefore the TTL-232R
cables has been designed to use as little as possible of the total USB bandwidth available from the USB
host controller.
High Output Drive Option. The UART interface I/O pins on the TTL-232R cables (RXD, TXD, RTS#, and
CTS#) can be configured to use the FT232R‟s high output drive option. This option allows the FT232R
I/O pins to drive up to three times the standard signal drive level. This allows multiple devices to be
driven, or devices that require a greater signal drive strength to be interfaced to the cables. This option is
enabled in the internal EEPROM.
UART Pin Signal Inversion. The sense of each of the eight UART signals can be individually inverted by
configuring options in the internal EEPROM. For example CTS# (active low) can be changed to CTS
(active high), or TXD can be changed to TXD#.
FTDIChip-ID™. The FT232R includes the new FTDIChip-ID™ security dongle feature. This FTDIChip-ID™
feature allows a unique number to be burnt into each cable during manufacture. This number cannot be
reprogrammed. This number is only readable over USB can be used to form the basis of a security dongle
which can be used to protect any customer application software being copied. This allows the possibility
of using the TTL-232R cables as a dongle for software licensing. Further to this, a renewable license
scheme can be implemented based on the FTDIChip-ID™ number when encrypted with other information.
This encrypted number can be stored in the user area of the FT232R internal EEPROM, and can be
decrypted, then compared with the protected FTDIChip-ID™ to verify that a license is valid. Web based
applications can be used to maintain product licensing this way. An application note, AN232R-02,
available from FTDI website (www.ftdichip.com) describes this feature.
Improved EMI Performance. The TTL-232R cables are FCC and CE certified.
Extended Operating Temperature Range - The TTL-232R cables are capable of operating over an
extended temperature range of -40º to +85º C thus allowing them to be used in automotive or industrial
applications.
Copyright © 2010 Future Technology Devices International Limited 10
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4 TTL-232R-5V and TTL-232R-3V3 Cables
The TTL-232R-5V and TTL-232R-3V3 cables are both terminated by a 6 way, 0.1”, Single-In-Line (SIL)
connector. The difference between the two cables is that the TTL-232R-5V operates at +5V levels (signals
and power supply) and the TTL-232R-3V3 operates at +3.3V levels (signals only, VCC= +5V).
4.1 TTL-232R-5V, TTL-232R-3V3 Connector Pin Out and Mechanical details
GND
CTS#
VCC
TXD
RXD
RTS#
1
2
3
4
5
6
CABLE 1.8m
VCC
1
2
3
4
5
6
6 pin header
0.1in pitch
BLACK
BROWN
RED
ORANGE
YELLOW
GREEN
Figure 4.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out
The mechanical details of the 6 way connector are shown in the following diagram
AB
C
D
Pin 1
E
Dimensions (mm)
2.54 +/- 0.05A
12.70 +/- 0.2B
C
14.0 +/- 0.2D
2.54 +/- 0.05E
15.24 +/- 0.2
Figure 4.2 TTL-232R-5V TTL-232R-3V3, 6 Way Header Mechanical Details
4.2 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions
Header Pin
Number
Name
Type
Colour
Description
1
GND
GND
Black
Device ground supply pin.
2
CTS#
Input
Brown
Clear to Send Control input / Handshake signal.
3
VCC
Output
Red
+5V output,
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Header Pin
Number
Name
Type
Colour
Description
4
TXD
Output
Orange
Transmit Asynchronous Data output.
5
RXD
Input
Yellow
Receive Asynchronous Data input.
6
RTS#
Output
Green
Request To Send Control Output / Handshake signal.
Table 4.1 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions
4.3 TTL-232R-5V and TTL-232R-3V3 Electrical Parameters
4.3.1 TTL-232R-5V Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB
port that the TTL-232R-
5V is connected to
IO
Output Power Current
-
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
-
+85
oC
Table 4.2 TTL-232R-5V I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
3.2
4.1
4.9
V
I source = 2mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 2mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 4.3 TTL-232R-5V I/O Pin Characteristics
4.3.2 TTL-232R-3V3 Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB
port that the TTL-232R-
3V3 is connected to
IO
Output Power Current
-
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
-
+85
oC
Table 4.4 TTL-232R-3V3 I/O Operating Parameters
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Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.8
3.2
V
I source = 3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 4.5 TTL-232R-3V3 I/O Pin Characteristics
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5 TTL-232R-5V-AJ and TTL-232R-3V3-AJ
The TTL-232R-5V-AJ and TTL-232R-3V3-AJ cables are both terminated by a standard 3.5mm Audio Jack
(AJ) connector. The difference between the two cables is that the TTL-232R-5V-AJ operates at +5V levels
(signals and power supply) and the TTL-232R-3V3-AJ operates at +3.3V levels (signals and power
supply). On these cables the VCC power is not transferred.
5.1 TTL-232R-5V-AJ, TTL-232R-3V3-AJ Connector Pin Out and Mechanical
details
Figure 5.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out
The mechanical details of the Audio Jack connector are shown in the following Figure 5.2.
Figure 5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Audio Jack Mechanical Details
GND
TXD
RXD
1
4
5
CABLE 1.8m
3.5mm Audio Jack
BLACK
ORANGE
YELLOW
14.0 +/- 0.2
3.0+/- 0.1 2.6+/- 0.1
3.2+/- 0.1 3.5+/- 0.1 6.0+/- 0.1
Dimensions in mm
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5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions
Header Pin
Number
Name
Type
Colour
Description
TIP
TXD
GND
Black
Transmit Asynchronous Data output.
RING
RXD
Input
Brown
Receive Asynchronous Data input.
SLEEVE
GND
Output
Red
GND
Table 5.1 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions
5.3 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Electrical Parameters
5.3.1 TTL-232R-5V-AJ Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
IO
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
oC
Table 5.2 TTL-232R-5V-AJ I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
3.2
4.1
4.9
V
I source = 6mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 6mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 5.3 TTL-232R-5V-AJ I/O Pin Characteristics
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5.3.2 TTL-232R-3V3-AJ Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
IO
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
oC
Table 5.4 TTL-232R-3V3-AJ I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.8
3.2
V
I source = 3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 5.5 TTL-232R-3V3-AJ I/O Pin Characteristics
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6 TTL-232R-5V-WE and TTL-232R-3V3-WE Cables
The TTL-232R-5V-WE and TTL-232R-3V3-WE cables are both un-terminated; they are bare and tinned
wires. The difference between the two cables is that the TTL-232R-5V-WE operates at +5V levels (signals
and power supply) and the TTL-232R-3V3-WE operates at +3.3V levels (signals only, VCC=+5V).
6.1 TTL-232R-5V-WE, TTL-232R-3V3-WE Connections and Mechanical
Details
The following Figure 6.1 shows the cable signals and the wire colours for these signals on the TTL-232R-
5V-WE and TTL-232R-3V3-WE cables.
Figure 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Connections
Figure 6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Mechanical Details (dimensions in mm)
6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions
Colour
Name
Type
Description
Black
GND
GND
Device ground supply pin.
Brown
CTS#
Input
Clear to Send Control input / Handshake signal.
Red
VCC
Output
+5V output
Orange
TXD
Output
Transmit Asynchronous Data output.
Yellow
RXD
Input
Receive Asynchronous Data input.
Green
RTS#
Output
Request To Send Control Output / Handshake signal.
Table 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions
6.3 TTL-232R-5V-WE and TTL-232R-3V3-WE Electrical Parameters
GND
CTS#
VCC
TXD
RXD
RTS#
1
2
3
4
5
6
CABLE 1.8m
VCC
1
2
3
4
5
6
BLACK
BROWN
RED
ORANGE
YELLOW
GREEN
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6.3.1 TTL-232R-5V-WE Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB port
that the TTL-232R-5V-WE is
connected to
IO
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
oC
Table 6.2 TTL-232R-5V-WE I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
3.2
4.1
4.9
V
I source = 6mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 6mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 6.3 TTL-232R-5V-WE I/O Pin Characteristics
6.3.2 TTL-232R-3V3-WE Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB port
that the TTL-232R-3V3-WE
is connected to
IO
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
oC
Table 6.4 TTL-232R-3V3-WE I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.8
3.2
V
I source = 3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 6.5 TTL-232R-3V3-WE I/O Pin Characteristics
Copyright © 2010 Future Technology Devices International Limited 18
Document Reference No.: FT_000054
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7 TTL-232R-3V3-2mm Cables
The TTL-232R-3V3-2mm cable is terminated by a 8 way, 2mm pitch, Single-In-Line (SIL) keyed
connector. The TTL-232R-3V3-2mm operates at +3.3V levels (signals and power supply). These cables
are primarily intended for interfacing the FTDI VDRIVE2 and VMUSIC2 modules.
Note that when connected to VDRIVE2 or VMUSIC2 module, the TTL-232R-3V3-2mm cable 8-way
connector pin 1 connects to pin 8 of the module, and pin 8 of the cable connects to pin 1 of the cable.
7.1 TTL-232R-3V3-2mm Connector Pin Out and Mechanical details
GND
CTS#
VCC
TXD
RXD
RTS#
8
7
6
5,1
4
3
CABLE 1.8m
VCC
1
2
3
4
5
6
8 pin header
2mm pitch
BLACK
BROWN
RED
ORANGE
YELLOW
GREEN
7
KEY
BLUE
8
Figure 7.1 TTL-232R-3V3-2mm, 8 Way Header Pin Out
The mechanical details of the 2mm pitch 8 way, keyed, connector are shown in the following diagram
A
B
C
D
Pin 1
E
Dimensions (mm)
2.00 +/- 0.005A
14.00 +/- 0.2B
C
7.10 +/- 0.25D
2.00 +/- 0.005E
16.40 +/- 0.2
Figure 7.2 TTL-232R-3V3-2mm, 2mm pitch, Keyed, 8 way Header Mechanical Details
Copyright © 2010 Future Technology Devices International Limited 19
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Clearance No.: FTDI# 53
7.2 TTL-232R-3V3-2mm Cable Signal Descriptions
Header Pin
Number
Name
Type
Colour
Description
1
RI#
Output
Blue
Ring Indicator Control Input. When remote wake up is
enabled taking RI# low (20ms active low pulse) can be
used to resume the VMUSIC2 or VDRIVE2 host controller
from suspend. Connected to TXD.
2
KEY
KEY
KEY
This connection is keyed to connect to the VRDIVE2 or the
VMUSIC2 modules
3
RTS#
Output
Green
Request To Send Control Output / Handshake signal.
4
RXD
Input
Yellow
Receive Asynchronous Data input.
5
TXD
Output
Orange
Transmit Asynchronous Data output.
6
VCC
Output
Red
+5V output,
7
CTS#
Input
Brown
Clear to Send Control input / Handshake signal.
8
GND
GND
Black
Device ground supply pin.
Table 7.1 TTL-232R-3V3-2mm Cable Signal Descriptions
7.3 TTL-232R-3V3-2mm Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB port
that the TTL-232R-3V3-2mm
is connected to
IO
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
oC
Table 7.2 TTL-232R-3V3-2mm I/O Operating Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.8
3.2
V
I source = 3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 7.3 TTL-232R-3V3-2mm I/O Pin Characteristics
Copyright © 2010 Future Technology Devices International Limited 20
Document Reference No.: FT_000054
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Clearance No.: FTDI# 53
8 Cable PCB Circuit Schematic
The circuit schematic for the small internal electronic circuit board, utilising the FTDI FT232R, which is
encapsulated into the USB connector end of the cable, is shown in Figure 8.1.
Customised versions of these cables are also available. Users interested in customised versions of these
cables should contact FTDI sales (sales1@ftdichip.com).
FT232RQ
30
32
2
8
4 17 20 24 26
14
15
18
1
19 16
270R
270R
TXD
RTS#
RXD
CTS#
100nF
VCC-3V3
VCCIO
VCC
100nF
4.7uF +
FB
10nF
1
2
3
4
5
GND
47pF x 2
USB-DP
USB-DM
USB “A” PLUG
INTERNAL IO VOLTAGE SELECTIONVCC
VCC-3V3
VCC-IO
PULL UP RESISTORS
NOT FITTED
CTS#
TXD
RXD
RTS#
VCC-IO
Figure 8.1 Circuit Schematic of PCB Used in the TTL to USB Serial Converter Cables
Copyright © 2010 Future Technology Devices International Limited 21
Document Reference No.: FT_000054
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9 Contact Information
Head Office – Glasgow, UK
Future Technology Devices International Limited
Unit 1, 2 Seaward Place,
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758
E-mail (Sales) sales1@ftdichip.com
E-mail (Support) support1@ftdichip.com
E-mail (General Enquiries) admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Web Shop URL http://www.ftdichip.com
Branch Office – Taipei, Taiwan
Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan , R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8751 9737
E-mail (Sales) tw.sales1@ftdichip.com
E-mail (Support) tw.support1@ftdichip.com
E-mail (General Enquiries) tw.admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Branch Office – Hillsboro, Oregon, USA
Future Technology Devices International Limited (USA)
7235 NW Evergreen Parkway, Suite 600
Hillsboro, OR 97123-5803
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-Mail (Sales)
us.sales@ftdichip.com
E-Mail (Support)
us.support@ftdichip.com
E-Mail (General Enquiries)
us.admin@ftdichip.com
Web Site URL
http://www.ftdichip.com
Branch Office – Shanghai, China
Future Technology Devices International Limited (China)
Room 408, 317 Xianxia Road,
ChangNing District,
ShangHai, China
Tel: +86 (21) 62351596
Fax: +86(21) 62351595
E-Mail (Sales): cn.sales@ftdichip.com
E-Mail (Support): cn.support@ftdichip.com
E-Mail (General Enquiries): cn.admin1@ftdichip.com
Web Site URL: http://www.ftdichip.com
Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and
sales representative(s) in your country.
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Appendix A - Cable EEPROM Configuration
Each TTL-232R cable is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM which
contains the USB configuration descriptors for that device. When the cable is plugged into a PC or a USB
reset is performed, the PC will read these descriptors. The default values stored into the internal EEPROM
are defined in Table 0.1
Parameter
Value
Notes
USB Vendor ID (VID)
0403h
FTDI default VID (hex)
USB Product UD (PID)
6001h
FTDI default PID (hex)
Serial Number Enabled?
Yes
Serial Number
See Note
A unique serial number is generated and programmed into
the EEPROM during device final test.
Pull down I/O Pins in USB
Suspend
Disabled
Enabling this option will make the device pull down on the
UART interface lines when the power is shut off (PWREN#
is high).
Manufacturer Name
FTDI
Product Description
See note
Product description depends on the cable. The following
lists the Product description for each different cable.
TTL-232R-5V
TTL-232R-3V3
TTL-232R-5V-AJ
TTL-232R-AJ-3V3
TTL-232R-5V-WE
TTL-232R-3V3-WE
TTL-232R-3V3-2mm = USB <-> Serial Cable
Max Bus Power Current
90mA
Power Source
Bus Powered
Device Type
FT232R
USB Version
0200
Returns USB 2.0 device description to the host.
Note: The device is be a USB 2.0 Full Speed device
(12Mb/s) as opposed to a USB 2.0 High Speed device
(480Mb/s).
Remote Wake Up
Disabled
High Current I/Os
Enabled
Enables the high drive level on the UART and CBUS I/O
pins.
Load VCP Driver
Enabled
Makes the device load the VCP driver interface for the
device.
Invert TXD
Disabled
Signal on this pin becomes TXD# if enable.
Invert RXD
Disabled
Signal on this pin becomes RXD# if enable.
Invert RTS#
Disabled
Signal on this pin becomes RTS if enable.
Invert CTS#
Disabled
Signal on this pin becomes CTS if enable.
Table 0.1 Default Internal EEPROM Configuration
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The internal EEPROM in the cable can be re-programmed over USB using the utility program FT_PROG.
FT_PROG can be downloaded from the www.ftdichip.com. Version 2.8a or later is required for the FT232R
chip. Users who do not have their own USB Vendor ID but who would like to use a unique Product ID in
their design can apply to FTDI for a free block of unique PIDs. Contact FTDI support for this service.
Copyright © 2010 Future Technology Devices International Limited 24
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Appendix B - List of Figures and Tables
List of Figures
Figure 1.1 Using the TTL-232R Cable ............................................................................................................ 1
Figure 4.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out ........................................................ 10
Figure 4.2 TTL-232R-5V TTL-232R-3V3, 6 Way Header Mechanical Details ............................................ 10
Figure 5.1 TTL-232R-5V and TTL-232R-3V3, 6 Way Header Pin Out ........................................................ 13
Figure 5.2 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Audio Jack Mechanical Details ............................... 13
Figure 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Connections ........................................................... 16
Figure 6.2 TTL-232R-5V-WE and TTL-232R-3V3-WE Mechanical Details (dimensions in mm) ............. 16
Figure 7.1 TTL-232R-3V3-2mm, 8 Way Header Pin Out ............................................................................. 18
Figure 7.2 TTL-232R-3V3-2mm, 2mm pitch, Keyed, 8 way Header Mechanical Details ......................... 18
Figure 8.1 Circuit Schematic of PCB Used in the TTL to USB Serial Converter Cables ........................ 20
List of Tables
Table 1.1 TTL-232R Cables Descriptions and Part Numbers ...................................................................... 2
Table 4.1 TTL-232R-5V and TTL-232R-3V3 Cable Signal Descriptions .................................................... 11
Table 4.2 TTL-232R-5V I/O Operating Parameters ...................................................................................... 11
Table 4.3 TTL-232R-5V I/O Pin Characteristics ........................................................................................... 11
Table 4.4 TTL-232R-3V3 I/O Operating Parameters .................................................................................... 11
Table 4.5 TTL-232R-3V3 I/O Pin Characteristics ......................................................................................... 12
Table 5.1 TTL-232R-5V-AJ and TTL-232R-3V3-AJ Cable Signal Descriptions ........................................ 14
Table 5.2 TTL-232R-5V-AJ I/O Operating Parameters ................................................................................ 14
Table 5.3 TTL-232R-5V-AJ I/O Pin Characteristics ..................................................................................... 14
Table 5.4 TTL-232R-3V3-AJ I/O Operating Parameters .............................................................................. 15
Table 5.5 TTL-232R-3V3-AJ I/O Pin Characteristics ................................................................................... 15
Table 6.1 TTL-232R-5V-WE and TTL-232R-3V3-WE Cable Signal Descriptions ...................................... 16
Table 6.2 TTL-232R-5V-WE I/O Operating Parameters ............................................................................... 17
Table 6.3 TTL-232R-5V-WE I/O Pin Characteristics .................................................................................... 17
Table 6.4 TTL-232R-3V3-WE I/O Operating Parameters ............................................................................. 17
Table 6.5 TTL-232R-3V3-WE I/O Pin Characteristics .................................................................................. 17
Table 7.1 TTL-232R-3V3-2mm Cable Signal Descriptions ......................................................................... 19
Table 7.2 TTL-232R-3V3-2mm I/O Operating Parameters .......................................................................... 19
Table 7.3 TTL-232R-3V3-2mm I/O Pin Characteristics ............................................................................... 19
Table 0.1 Default Internal EEPROM Configuration ..................................................................................... 22
Copyright © 2010 Future Technology Devices International Limited 25
Document Reference No.: FT_000054
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Clearance No.: FTDI# 53
Appendix C - Revision History
Version 1.00 Full datasheet released May 2006
Version 2.00 Consolidated all TTL-232R variants into one datasheet.
Changed part numbers for +5V cables. July 2008
Version 2.01 Corrected Table 6.1, RED wire VCC description September 2008
Version 2.02 Corrected Table 4.3, I source and I sink values 2nd September 2010
Added section 1.3 USB Compliant Logo
Updated contact details
Replaced reference MProg with FT_Prog
