NC

R

RE

DE

D

GND

GND

V

CC

V

CC

A

B

Z

Y

NC

D PACKAGE (TOP VIEW)

NC - No internal connection

1

2

3

4

5

6

7

14

13

12

11

10

9

8

R

RE

DE

D

A

B

Z

Y

LOGIC DIAGRAM (POSITIVE LOGIC)

4

5

3

2

11

12

10

9

SN65HVD37

www.ti.com

SLLSE92 A

– OCTOBER 2011 – REVISED NOVEMBER 2011

Low-Power 3.3V-Supply Full-Duplex RS-485 Driver/Receiver

Check for Samples: SN65HVD37

1

FEATURES

DESCRIPTION

The SN65HVD37 combines a robust differential driver

•

Low-Current Standby Mode:

<1 μA Typical

and

a

receiver

with

high

noise

immunity

for

•

Operational Quiescent Current

< 1 mA

demanding

industrial

applications.

The

driver

•

High Receiver Hysteresis for Noise Immunity

differential outputs and the receiver differential inputs

(60 mV Typical)

are separate pins, to form a bus port for full-duplex

(four-wire) communications. The driver and receiver

•

1/8 Unit-Load (Up to 256 Nodes on the Bus)

can be independently enabled, and feature a wide

•

Bus-pin ESD Protection Exceeds 15 kV HBM

common-mode voltage range, making this device

•

Driver Output Transition Times Optimized for

suitable for multi-point applications over long cable

Signaling Rate up to 20 Mbps

runs. The SN65HVD37 is characterized over the

temperature range of -40

ºC to 85 ºC.

•

Glitch-Free Power-Up and Power-Down

Protection for Hot-Plugging Applications

•

5V-Tolerant Logic Inputs

•

Bus Idle, Open, and Short-Circuit Failsafe

•

Driver Current Limiting and Thermal Shutdown

•

Fully Meets All TIA-485-A Specifications

APPLICATIONS

•

Telecommunications Equipment

•

Industrial Automation

•

Process Automation

•

Building Automation

•

Point-of-Sale (POS) Terminals

•

Improved Replacement for ADM3076,

ADM3491, LTC2852, MAX3491 and SP3491

Figure 1. 60 mV Receiver Hysteresis for Noise Immunity

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.