SN75176ADR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	R	output	Logic data output from RS-485 receiver. CMOS/TTL-level output driven from the differential bus receiver; high-impedance when RE is high.
2	RE	input	Receive Enable, active low. Drive low to enable the receiver output R; drive high to place R in high-impedance state.
3	DE	input	Driver Enable, active high. Drive high to enable the differential driver onto the A/B bus; drive low to place A and B in high-impedance state.
4	D	input	Logic data input to RS-485 driver. TTL/CMOS-level input; when driver is enabled, a high on D drives A high and B low.
5	GND	power_in	Device ground pin. Connect to system 0 V reference.
6	A	bidirectional	RS-422/RS-485 differential bus line A (non-inverting). Common driver output / receiver input; withstands −7 V to +12 V common-mode. Input impedance ≥12 kΩ (receiver).
7	B	bidirectional	RS-422/RS-485 differential bus line B (inverting). Common driver output / receiver input; withstands −7 V to +12 V common-mode. Input impedance ≥12 kΩ (receiver).
8	VCC	power_in	Power input. Connect to a single 5-V supply (4.75 V to 5.25 V recommended, 7 V absolute maximum). Decouple locally to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Logic
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN75176ADR
SN75176ADRD
SN75176ADRP
SN75176ADRN

CAD (KiCad official)

Symbol: SN75176ADR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (27 pp, sha256 2babdfd0a4167c8c, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF