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Texas Instruments SN75ALS171ADW — Sensors & Transducers

SN75ALS171ADW Texas Instruments RS422/RS485 Half-Duplex

MPNSN75ALS171ADW
End of Life

Texas Instruments SN75ALS171ADW, half-duplex transceiver, RS422/RS485, 3 drivers / 3 receivers, 4.75V–5.25V supply, 0°C–70°C, 20-SOIC (0.295", 7.50mm width), surface mount.

$11.29Ref. price · indicative, final on quote
Texas Instruments SN75ALS171ADW datasheet (PDF)
Packaging20-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN75ALS171ADW specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Supply voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature0°C ~ 70°C
DuplexHalf
PackageTube
Case20-SOIC (0.295\", 7.50mm Width)
Receiver hysteresis60 mV
Number of drivers (Receivers)3/3

Product details

What this transceiver does on the bus

The SN75ALS171ADW is a half-duplex transceiver supporting both RS422 and RS485 protocols, with three independent driver and receiver pairs on one chip. It runs off a 5V nominal supply (4.75V to 5.25V) and includes 60 mV of receiver hysteresis to reject noise on long cable runs.

Package and mounting for the rework bench

Housed in a 20-SOIC wide-body package (0.295" body width, 7.50 mm), surface-mount only — no socket option, so plan for soldering with a fine-tip iron or hot-air station.

Frequently asked questions

What is the difference between SN75ALS171ADW and SN65ALS171ADW?

The SN65ALS171ADW is the industrial-temperature version (typically -40°C to 85°C) of the same transceiver. The SN75ALS171ADW is commercial-grade (0°C to 70°C). Pinout and function are identical; the temperature grade is the only difference.