SN65176BDR from UMW, in a SOP-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	Receiver output (RO). Logic-level (TTL/CMOS) data output from the RS-485 receiver. VOH >= 2.7 V at IOH = -400 uA; VOL <= 0.45 V at IOL = 8 mA. High-impedance when RE is deasserted (high).
2	RE	input	Receiver Enable (active low). Drive low to enable receiver output R; drive high to tri-state R. TTL input, VIH >= 2.0 V, VIL <= 0.8 V.
3	DE	input	Driver Enable (active high). Drive high to enable the differential driver outputs A/B; drive low to tri-state the driver. TTL input, VIH >= 2.0 V, VIL <= 0.8 V.
4	D	input	Driver input (DI). Logic-level (TTL/CMOS) data input to the RS-485 driver. When DE is high, D=high drives A>B and D=low drives A<B.
5	GND	power_in	Device ground reference (0 V). Connect to system ground.
6	A	bidirectional	Non-inverting RS-422/RS-485 differential bus line. Driver output when DE=1, receiver input when RE=0. Withstands -7 V to +12 V common-mode; differential threshold
7	B	bidirectional	Inverting RS-422/RS-485 differential bus line. Driver output when DE=1, receiver input when RE=0. Withstands -7 V to +12 V common-mode; forms the differential pair with A.
8	VCC	power_in	Supply input, +5 V nominal (4.75 V to 5.25 V recommended; 7 V absolute max). Typical ICC = 42 mA outputs enabled, 26 mA disabled. Bypass with a local decoupling capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN65176BDR
SN65176BDRD

CAD (KiCad official)

Symbol: SN65176BDR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn65176bdr.step`	122 KB	You want the bare part, or you mark your own boards.
`sn65176bdr-etched.step`	2.2 MB	You want the part with `SN65176BDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 547 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: UMW datasheet (12 pp, sha256 03ef2b23ed23a2cd, retrieved 2026-08-17, tier: lcsc)
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