3V to 5.5V, 52Mbps, TSOT23 RS-485/RS-422
Receivers with ±15kV ESD Protection
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FEATURES
Max 52Mbps data rate
Wide 3.0V to 5.5V supply operation
Robust Electrostatic Discharge (ESD)
protection for RS-485 bus pins
±15kV human body model
±15kV IEC61000-4-2 air discharge
±8kV IEC61000-4-2 contact
discharge
Enhanced receiver failsafe protection for
open, shorted, or terminated but idle data
lines
-40°C to 125°C ambient operating
temperature range
Lead-free (RoHS 6) TSOT23-5 and
TSOT23-6 packaging
Absolute minimum pin count option,
XR33180 (5-pin TSOT23)
Tri-state RO options, XR33181 and
XR33183
Adjustable I/O supply option to help
interfacing to lower voltage logic, XR33184
APPLICATIONS
Clock distribution
Robotic control
Space constrained systems
Security camera networks
Industrial and process control equipment
Description
The XR33180, XR33181, XR33183 and XR33184 are high performance
RS-485/RS-422 receivers designed to meet the increasing system
requirements found in today’s high performance serial communication
applications.
The receiver includes enhanced failsafe circuitry, guaranteeing
a logic-high receiver output when the receiver inputs are open,
shorted, or undriven. The XR33180/81/83/84 (XR3318x) receiver
input impedance is at least 48kΩ (1/4 unit load), allowing more than
128 devices on the bus. The bus pins are ESD protected and pass
IEC61000 level 4 (±15kV).
This is a wide supply (3.0V to 5.5V) device that operates at a maximum
data rate of 52Mbps and comes in very small 5-pin and 6-pin TSOT23
packages, making this standalone receiver ideal for high speed
point-to-point RS-485 applications where space is a concern.
The XR3318x offers several pinout options to maximize performance
in different applications while maintaining a minimum pin count. The
XR33180 is available in a 5-pin TSOT23 package with the receiver
always enabled. The XR33181 is available in a 6-pin TSOT23 package
and offers a active high receiver enable pin while the XR33183 has the
same pinout but with active low enable pin. The XR33184 is available
in a 6-pin TSOT23 package with a I/O logic supply pin to ease the
interface to MCU’s or FPGA’s that run off of different supply voltages.
The VL supply pin allows the XR33184 to interface to other devices
running off of supplies from ranging from 1.65V to VCC.
All XR3318x options operate up to a max data rate of 52Mbps, and
have excellent propagation delay and skew characteristics making
them a good choice for clock fanout or clock distribution systems.
Typical Application
Figure 1. Typical Application
VCC
3.3V to 5.0V
RO
120Ω
GND
R
A
B
XR3318x
VCC
3.3V
GND
D
XR3319x
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Absolute Maximum Ratings
Stresses beyond those listed under Absolute Maximum
Ratings may cause permanent damage to the device.
Exposure to any Maximum Rating condition for extended
periods may affect device reliability and lifetime.
Supply voltage (VCC) ...................................... -0.3V to 7.0V
Junction temperature ................................................. 150°C
Input Voltages
EN and EN ...................................................... -0.3V to 7.0V
Output Voltage
RO (XR33180/81/83) ......................... -0.3V to (VCC + 0.3V)
RO (XR33184) ......................................-0.3V to (VL + 0.3V)
Receiver Input Voltages
A, B ..............................................................................±18V
Transient voltage pulse, through 100Ω(1) ................... ±100V
ESD Ratings
HBM - Human Body Model (A and B pins) ................ ±15kV
HBM - Human Body Model (all other pins) .................. ±4kV
IEC61000-4-2 Air Gap Discharge .............................. ±15kV
IEC61000-4-2 Contact Discharge ................................ ±8kV
NOTE:
1. Refer to Figure 3.
Operating Conditions
Operating temperature range ...................... -40°C to 125°C
VCC supply range .............................................3.0V to 5.5V
Thermal Information
5-pin TSOT23 θJA............................................... 185.5°C/W
5-pin TSOT23 θJC ................................................ 61.6°C/W
6-pin TSOT23 θJA............................................... 167.3°C/W
6-pin TSOT23 θJC ................................................ 61.6°C/W
Electrical Characteristics
Specifications are at TA = 25°C, VCC = 3.0V to 5.5V unless otherwise noted. Typical values represent the most likely
parametric norm at TA = 25°C, and are provided for reference purposes only.
Symbol Parameter Conditions Min Typ Max Units
Supply
VCC Supply voltage range 3.0 5.5 V
VLI/O supply voltage range VL ≤ VCC 1.65 VCC V
ICC Supply current No Load, XR33180/81/83/84 2.5 5 mA
ILI/O supply No Load, XR33184 10 μA
Receiver DC Characteristics
VTH Receiver differential threshold voltage,
VA - VB-7V ≤ VCM ≤ 12V -200 -125 -50 mV
∆VOH Receiver input hysteresis VCM = 0V 25 mV
RIN Receiver input resistance -7V ≤ VCM ≤ 12V 48 kΩ
IA,B Input current, A and B
VOUT = 12V, VCC = 0V or 5.5V 250 μA
VOUT = -7V, VCC = 0V or 5.5V -200 μA
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Electrical Characteristics
Specifications are at TA = 25°C, VCC = 3.0V to 5.5V unless otherwise noted. Typical values represent the most likely
parametric norm at TA = 25°C, and are provided for reference purposes only.
Symbol Parameter Conditions Min Typ Max Units
Logic Inputs/Outputs
VIH Logic high input thresholds, EN and EN XR33181/83 2 V
VIL Logic low input thresholds, EN and EN XR33181/83 0.4 V
IENLEAK Enable pin leakage XR33181/83 -10 10 μA
VOH Receiver output high voltage, RO IOUT = -4mA, XR33180/81/83 VCC - 0.4 V
VOL Receiver output low voltage, RO IOUT = 4mA, XR33180/81/83 0.4 V
VOH Receiver output high voltage, RO
3.0V ≤ VL ≤ 5.5V, IOUT = -4mA
1.65V ≤ VL ≤ 3.0V, IOUT = -1mA,
XR33184
VL - 0.4 V
VOL Receiver output low voltage, RO
3.0V ≤ VL ≤ 5.5V, IOUT = 4mA
1.65V ≤ VL ≤ 3.0V, IOUT = 1mA,
XR33184
0.4 V
IOSC Receiver output short-circuit current 0V ≤ VRO ≤ VL-120 120 mA
IOZR High-Z receiver output current 0V ≤ VOUT ≤ VCC, XR33180/81/83
0V ≤ VOUT ≤ VL, XR33184 -1 1 μA
Thermal Characteristics
TTS Thermal shutdown temperature 168 °C
TTSH Thermal shutdown hysteresis 15 °C
Receiver AC Characteristics
tRPLH Receiver propagation delay, low to high
CL = 15pF, VID = ±2V, VID rise and fall
times <15ns, Figure 4
15 ns
tRPHL Receiver propagation delay, high to low 15 ns
|tRPLH - tRPHL| Receiver propagation delay skew 2 ns
Propagation delay matching, device to
device(1)
Part to part comparisons must have
the same supply conditions and
temperature difference ≤ 30°C (max)
8 ns
Maximum data rate(1) CL = 15pF, Duty Cycle 40 to 60% 52 Mbps
tRZH Receiver enable to output high
CL = 15pF, RL = 1KΩ, Figure 5
500 ns
tRZL Receiver enable to output low 500 ns
tRHZ Receiver disable from output high 500 ns
tRLZ Receiver disable from output low 500 ns
NOTE:
1. Guarenteed by design.
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Pin Configuration
Pin Functions
Pin Number
Pin Name Type Description
XR33180 XR33181 XR33183 XR33184
1 1 1 1 VCC Supply Power supply, bypass with 0.1μf capacitor
2 2 2 2 GND Supply Ground
3 3 3 3 RO Output
Receiver output:
if (VA-VB) ≥ -50mV, RO is high
if (VA-VB) ≤ -200mV, RO is low
4 4 4 4 B Bus Input ±15KV ESD protected, RS-485/RS-422 inverting receiver input
- 5 - - EN Input
Receiver output enable:
when EN is low, RO is disabled, high impedance
when EN is high, RO is enabled
- - 5 - EN Input
Receiver output enable:
when EN is high, RO is disabled, high impedance
when EN is low, RO is enabled
- - - 5 VL Supply Logic interface power supply
5 6 6 6 A Bus Input ±15KV ESD protected, RS-485/RS-422 non-inverting receiver
input
RO B
A
GND
1
2
5
XR33180
TSOT23-5
VCC
4
3
RO B
A
GND
1
2
6
XR33181
TSOT23-6
VCC
4
3
EN
5
RO B
A
GND
1
2
6
XR33183
TSOT23-6
VCC
4
3
EN
5
RO B
A
GND
1
2
6
XR33184
TSOT23-6
VCC
4
3
VL
5
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Pin Functions (Continued)
Receiving
Inputs Output
RE VA - VBRO
0 ≥ -50mV 1
0 ≤ -200mV 0
0 Open/shorted/idle 1
1 X High-Z
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Functional Block Diagrams
Figure 2. Functional Block Diagrams
A
RO
XR33180
B
A
RO
EN
XR33181
B
A
RO
XR33184
B
A
VCC
RO
EN
XR33183
B
VCC
VCC
VCC VL
XR33180
XR33181
XR33183
XR33184
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Figure 3. Transient Overvoltage Test Circuit
DEVICE POWERED
ON/OFF A
B
VTEST
15 US DURATION
15 DUTY CYCLE
100Ω
TRANSCEIVER,
GENERATOR,
RECEIVER
Figure 4. Receiver Propagation Delay Test Circuit and Timing Diagram
R RO
CL
RE = OV
A
B
tRPLH
B
A
RO
tRPHL
VID
–1V
0V
+1V
VOL
VCC/2 VCC/2
VOH
Applications Information
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Figure 5. Receiver Enable and Disable Test Circuits and Timing Diagrams
R RO
RLCL
RE
A
B
RL
VCC
R RO
CL
RE
A
B
RO
1.5V 1.5V
3V
tRZH
VOH VOH – 0.25V
VA = VCC
VB = OV
2
tRHZ
OV
VOH
OV
RE
1.5V 1.5V
3V
tRZL
VCC + VOL
VOL + 0.25V
2
tRLZ
OV
VCC
VOL
RO
VA = OV
VB = VCC
RE
Applications Information (Continued)
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Applications Information (Continued)
The XR3318x RS-485/RS-422 device is part of MaxLinear’s high performance serial interface product line. The analog bus
pins can survive direct shorts up to ±18V and are protected against ESD events up to ±15kV.
Enhanced Failsafe
Ordinary RS-485 differential receivers will be in an indeterminate state whenever the data bus is not being actively driven.
The enhanced failsafe feature of the XR3318x guarantees a logic-high receiver output when the receiver inputs are open,
shorted or when they are connected to a terminated transmission line with all drivers disabled. In a terminated bus with all
transmitters disabled, the receivers’ differential input voltage is pulled to 0V by the termination. The XR3318x interprets 0V
differential as a logic high with a minimum 50mV noise margin while maintaining compliance with the RS-485 standard of
±200mV. Although the XR3318x does not need failsafe biasing resistors, it can operate without issue if biasing is used.
±15kV ESD Protection
ESD protection structures are incorporated on all pins to protect against electrostatic discharges encountered
during handling and assembly. The receiver inputs of the XR3318x have extra protection against static electricity.
MaxLinear uses state-of-the-art structures to protect these pins against ESD of ±15kV without damage.
The ESD structures withstand high ESD in all states: normal operation and powered down. After an ESD event, the XR3318x
keeps operating without latch-up or damage.
ESD protection can be tested in various ways. The receiver inputs of the XR3318x are characterized for protection to the
following limits:
±15kV HBM (Human Body Model), bus pins
±15kV IEC 61000-4-2 air discharge, bus pins
±8kV IEC 61000-4-2 contact discharge, bus pins
±4kV using the Human Body Model, all other pins
ESD Test Conditions
ESD performance depends on a variety of conditions. Contact MaxLinear for a reliability report that documents test setup,
methodology and results.
Maximum Number of Receivers on the Bus
The standard RS-485 receiver input impedance is 12kΩ (1 unit load). A standard driver can drive up to 32 unit loads. The
XR3318x receiver has a 1/4th unit load receiver input impedance of 48KΩ, allowing up to 128 receivers to be connected in
parallel on a communication line. Any combination of the XR33180/81/83/84’s and other RS-485 receivers up to a total of
32 unit loads may be connected to the line.
Product Selector Guide
Part Number Data Rate Receiver Enable Nodes On Bus VL Pin Package
XR33180
52Mbps
No
128
No 5-pin TSOT23
XR33181 Yes (active high) No
6-pin TSOT23XR33183 Yes (active low) No
XR33184 No Yes
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Mechanical Dimensions
5-Pin TSOT23
1.AlldimensionsareinMillimeters
2.DimensionsandtoleranceperJedecMO‐193
Drawing No. : POD - 00000076
Revision: A.1
SIDEVIEW‐1
TOP VIEW
DETAIL
"A"
TYPICAL RECOMMENDEDLANDPATTERN
SIDE VIEW‐ 2
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Mechanical Dimensions (Continued)
6-Pin TSOT23
1. AlldimensionsareinMillimeters
2. DimensionsandtoleranceperJedecMO‐193
Drawing No. : POD - 00000077
Revision: A.1
SIDEVIEW‐1
TOP VIEW
DETAIL
TYPICAL RECOMMENDEDLANDPATTERN
SIDE VIEW‐ 2
XR33180/81/83/84
The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes
no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the
user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic,
mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc.
Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support
system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the
risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of MaxLinear, Inc. is adequately protected under the circumstances.
MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written
license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property.
Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated.
© 2016 - 2018 MaxLinear, Inc. All rights reserved
XR33180/81/83/84_DS_020118 12/12
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Corporate Headquarters:
5966 La Place Court
Suite 100
Carlsbad, CA 92008
Tel.:+1 (760) 692-0711
Fax: +1 (760) 444-8598
www.maxlinear.com
High Performance Analog:
1060 Rincon Circle
San Jose, CA 95131
Tel.: +1 (669) 265-6100
Fax: +1 (669) 265-6101
Email: serialtechsupport@exar.com
www.exar.com
Ordering Information(1)
Part Number Additional
Feature
Operating
Temperature
Range
Lead-Free Package Packaging Method
XR33180ESBTR -
-40°C to 125°C Yes(2)
5-pin TSOT23
Tape and Reel
XR33181ESBTR Active High
Enable
6-pin TSOT23XR33183ESBTR Active Low
Enable
XR33184ESBTR Logic Level
Supply, VL
XR33180ESBEVB
Evaluation Board
XR33181ESBEVB
XR33183ESBEVB
XR33184ESBEVB
NOTE:
1. Refer to www.exar.com/XR33180, www.exar.com/XR33181, www.exar.com/XR33183, www.exar.com/XR33184 for most up-to-date Ordering Information.
2. Visit www.exar.com for additional information on Environmental Rating.
Revision History
Revision Date Description
1A June 2016 Initial Release
1B August 2016 Update tape and reel quantity in Ordering Information table
1C February 2018 Update to MaxLinear logo. Update format and Ordering Information format. Moved ESD
ratings to page 2.
