PS016007-0910
DO NOT USE IN LIFE SUPPORT
LIFE SUPPORT POLICY
ZILOG'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICA L COMPONENTS IN LIFE
SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF
THE PRESIDENT AND GENERAL COUNSEL OF ZILOG CORPORATION.
As used herein
Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b)
support or sustain life and whose failure to perform when properly used in accordance with instructions for
use provided in the labeling can be reasonably expected to result in a significant injury to the user. A
critical component is any component in a life support device or system whose failure to perform can be
reasonably expected to cause the failure of the life support device or system or to affect its safety or
effectiveness.
Document Disclaimer
©2010 by Zilog, Inc. All rights reserved. Information in this publication concerning the devices,
applications, or technology described is intended to suggest possible uses and may be superseded. ZILOG,
INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY
OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT.
ZILOG ALSO DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY
INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR
TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. The information contained within this
document has be en verified according to the gene ral pr inciples of electrical and mechanical engineering.
Z8, Z8 Encore!, and Z8 Encore! XP are registered trademarks of Zilog, Inc. All other product or service
names are the proper ty of thei r resp ec tiv e ow ners .
Warning:
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910 Table of Contents
iii
Table of Contents
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LEDA LED Driver Anode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TXD Transmit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RXD/Receive Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SD Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
VCC Positive Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GND Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Recommended Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical and Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mechanical Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Soldering and Cleaning Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reflow Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Manual Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Packing, Storage, and Baking Recommendations. . . . . . . . . . . . . . . . . . . . . . . 11
Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Baking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Moisture-Proof Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Taping Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
1
Description
The ZILOG ZHX1820 is a low-profile version of Zilog’s popular ZHX1010
1-meter transceiver. Packaged in the “top-look” configuration (that is, the lens axis
is perpendicular to the mounting surface), the transceiver is mechanically
enhanced for ultra comp act, power-conscious portable prod ucts, such as port able
printers, handheld computers, and personal data assistants (PDAs). Designed to
operate using the IrDA-Data mode, the transceiver combines an infrared emitting
diode (IRED) emitter, a PIN photodiode detector, a digital AC coupled LED drive r,
and a receiver/decoder in a single package.
The ZILOG ZHX1820 provides an efficient implementation of the SIR standard in
a small-outline footprint format. Application circuit sp ace is also minimized, as only
three components are required.
ZHX1820 also features an independently controlled shutdown that minimizes
current draw to a maximum of 1 A.
Features
•
Compliant to IrDA Data Specification SIR
•
Wide power supply voltage range, 2.4 to 5.5 V
•
Low-power, listening current, 90 A (typical) at 3.0 V
•
Slim form factor (9.0 mm long x 3.65 mm wide x 2.75 mm high)
•
Only two external components required
•
Telecom operating temperature range (–30 °C to +85 °C) with the
ZHX1820TV115THTR
•
Extended operating temperature range (–40 °C to +85 °C) with the
ZHX1820TV115XHTR
•
0 to 1 meter minimum link distance; 0 to 1.5 met ers typical (–30 °C to +85 °C)
–
0 to 80 cm minimum link distance; 0 to 1.2 meters typical (below 30 °C)
•
Meets IEC 825-1 Class 1 Eye Safety Specifications
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
2
Block Diagram
Figure 1 is the block diagram for the Slim SIR transceiver.
Figure 1. Slim SIR Transceiver Block Diagram
Pin Descriptions
The ZHX1820 transceiver uses the pins listed in Table 1. The pins are described
in this section.
Table 1. Pin Out for the ZHX1820 Transceiver
Pin Name Function I/O
1 LEDA IRED anode —
2 TXD Transmitter input I
3 RXD Receiver output O
4 SD Enables shutdown mode I
5V
CC Supply voltage —
6 GND Ground —
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
3
LEDA LED Driver Anode
(Power)
This output is connecte d to the LED anode. Current to the LED is sourced th rough
an external resistor.
TXD Transmit Data
(Input, active high)
This CMOS input is used to transmit serial data. This input has an internal pull-
down resistor that is disabled (open-circuited) during shutdown.
RXD/Receive Data
(Output, active low)
This output indicates received serial data. It is a tri-state, slew rate controlled
CMOS output (tri-stated during shutdown) driver capable of driving a standard
CMOS load. No external resistor is required.
SD Shutdown
(Input, active high)
This input is used to place the integrated circuit into shut down mode. Module shut-
down current is influenced by the choice of capacitor used from VCC to ground.
VCC Positive Supply
(Power)
Connect to positive power supply (2.4–5.5 V). Filter with a 0.33-F ceramic
bypass capacitor and terminating resistor as close as possible to the VCC pin.
GND Ground
(Power)
Connect to ground of the power supply. A solid ground plane is recommended for
proper operation.
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
5
Electrical and Timing Specifications
Table 2 through Table 4 present the electrical and timing specifications for the
ZHX1820 transceiver.
Table 2. Absolute Maximum Ratings
Parameter Symbol Minimum Maximum Unit Comment
Supply Voltage Vcc –0.3 6.0 V Vcc, GND
Input Voltage VIN GND–0.3 Vcc+0.3 V TxD, SD
Output (External) Voltage VOUT GND–0.3 Vcc+0.3 V RxD
LED Current ILED 700 mA 20% duty cycle,
Ta=25 °C,
tON<90 S
Storage Temperature TST –40 100 °C
Solder Temperature TSOL 240 °C
Table 3. Recommended Operating Conditions
Parameter Symbol Minimum Maximum Unit
Supply Voltage Vcc 2.4 5.5 V
LED Voltage VLED 2.4 6.0 V
Ambient Oper at ing Temperatur e TOP –30 85 °C
Ambient Oper at ing Temperatur e * TOP –40 85 °C
Note: * ZHX1820T V1 1 5XH TR only
Table 4. Electrical Characteristics
Parameter Symbol Condition Min Typical Max Unit Remarks
High-Level Input Voltage VIH 0.6 Vcc Vcc+0.5 V TXD, SD
Low-Level Input Voltage VIL –0.5 0.2 Vcc V TXD, SD
High-Level Output Voltage VOH 2.2 V RxD
Low-Level Output Voltage VOL 0.4 V RxD
Transmitter Current ILED 300 mA
Listening Current ICC 90 150 A
Receive Current ICC 90 150 A
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
6
Figure 3 through Figure 6 show various electrical characteristics.
Figure 3. IF-Ie Characteristics (0°)
Standby Current ISTB 1ASD=V
cc,
TxD=0 V
Optical Rise/Fall Time tRr, tRf 100 nS
RxD Pulse Width tPWA SIR=115.2
Kbps 1.1 1.6 3.9 S
Power Shutdown Time TSD 1S
Startup Time TSTU 200 S
Receiver Latency TL100 S
Trans. Radiant Intensity IEILED=260 mA 40 100 mW/sr h,
v<(+15)
Min. Threshold Irradiance Eemin Vcc=3.3 V 2 3 W/cm2h,
v<(+15)
Angle of Half Intensity 20 ° Hor. and
Vert.
Light Pulse Rise, Fall Time tor, tof 40 nS
Optical Pulse Width tOPW 20 STxD=“H”
Optical Overshoot tOPO 3%
Peak Wavelength P870 nm
Unless otherwise no te d: Vcc=3.3 V, GND= 0 V, TA= 25 °C
Table 4. Electrical Characteristics (Continued)
Parameter Symbol Condition Min Typical Max Unit Remarks
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
7
Figure 4. IF-LEDA Characteristics (0°)
Figure 5. Directive Characteristics (Emitting)
Figure 6. Directive Characteristics (Receiving)
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
8
Mechanical Drawings
The mechanical drawings for these transceivers are shown in Figure 7.
Figure 7. ZHX1820 Mechanical Drawing
1.35
1.475
33.1
1.8
2.75
3.3
3.65
Units: mm
Tolerance: +/- 0.2
PIN FUNCTION PIN FUNCTION
1
GND
2RXD
3VCC
4SD
5
6
LEDA
TXD
P1.55±0.1×5=7.75±0.1
0.7
3.875 (3.875)
0.475
(6) (5) (4) (3) (2) (1)
0.8
Note that this style has a larger
emitter lens than receive lens
RXTX Receiving Center
LENS VIEW
CONTACTS VIEW
Top Look Solder Pad layout
9.0 (ref.)
Emitting Center
This style does not
have side solder vias
SIDE VIEW
0.70
0.80
1.55
Mounting
Center
4.325
0.45 0.45
0.75
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
9
Soldering and Cleaning Recommendations
Follow these recommendations to maintain the performance of the ZHX1820
transceiver.
Reflow Soldering
•
Reflow soldering paste is recommended:
Melting temperature: 178 °C ~ 192 °C
Composition: Sn 63%, Pb 37%
•
The recommended thickness of the metal mask is between 0.2 mm and
0.25 mm for screen printing.
•
Number of soldering times: 2 times maximum
•
The temperature profile at the top surface of ZHX1820, shown in Figure 8, is
recommended.
Figure 8. Temperature Profile at the Top Surface of ZHX1820
Manual Soldering
•
Use 63/37 or silver solder.
•
Use a soldering iron of 25 W or smaller. Adjust the temperature of the
soldering iron below 300 °C.
•
Finish soldering within 3 seconds.
•
Handle only after ZHX1820 has cooled off.
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
10
Cleaning
Perform cleaning after soldering under the following conditions:
•
Cleaning agent: Alcohol
•
Temperature and time: 30 seconds below 50 °C or 3 minutes below 30 °C
•
Ultrasonic cleaning: Below 20 W
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
11
Packing, Storage, and Baking Recommendations
Follow these recommendations to maintain the performance of the ZHX1820
transceiver.
Storage
To avoid moisture absorption, ZHX1820 reels must remain in the original,
unopened moisture-proof packing. Parts must be soldered within 72 hours after
unpacking. Reels that have been unpacked, but will not be soldered within 72
hours, must be stored in a desiccator.
Baking
Parts that have been stored over 12 months or unpacked over 72 hours must be
baked under the following guidelines.
Reels
60 °C for 48 hours or more
Loose Parts
•
100 °C for 4 hours or more
or
•
125 °C for 2 hours or more
or
•
150 °C for 1 hour or more
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
12
Moisture-Proof Packing
In order to avoid moisture absorption during transportation and storage, ZHX1820
reels are packed in aluminum envelopes (see Figure 9) that contain a desiccant
with a humidity indicator. While this packaging is an impediment to moisture
absorption, it is by no means absolute, and no warranty is implied. The user should
store these parts in a controlled environment to prevent moisture entr y. Please read
the label on the aluminum bag for indicator instructions.
Figure 9. ZHX1820 Packaging
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
13
Taping Specifications
Figure 10 shows the reel dimensions for the ZHX1820, and Figure 11 shows the
tape dimensions and configuration for the ZHX1820.
Figure 10. ZHX1820 Reel Dimensions (Unit: mm)
1RWH 0DWHULDO$QWL6WDWLF3RO\VWHUHQH
6XUIDFH5HVLVWLYLW\(WR(2KPV64
8QOHVVVSHFLILHG7RO
DEVICE Carrier Tape A W1 W2 (max) N (Hub Dia.) Reel Qty
Size ± 0.25 +2/-0
=+; 16 mm 330 16.4 21.6 80 mm 2,000
13.0+0.50/-0.20
LABEL A
PASTED
HERE
A21.0±0.8
W2
N
W1
Detail A Detail A
2.0±0.50 (3PLCS)
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
14
Figure 11. ZHX1820 Tape Dimensions and Configuration (Unit: mm)
USER DIRECTION FEEDS
Trailer
(40 mm min.) Leader
(400 mm MIN)
Parts Mounted QTY (see Table)
USER DIRECTION OF FEEDS
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
15
Ordering Informatio n
To order Top Look ZHX1820, use Zilog part number ZHX1820TV115THTR
(–30 °C to +85 °C) or ZHX1820TV115XHTR (–40 °C to +85 °C).
ZHX1820
Slim SIR Top Look Transceiver
PS016007-0910
16
Customer Support
For answers to technical questions about the product, documentation, or any
other issues with Zilog’s offerings, please visit Zilog’s Knowledge Base at http://
www.zilog.com/kb.
For any comments, detail technical questions, or reporting problems, please visit
Zilog’s Technical Support at http://support.zilog.com.
