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SN75176BDR

Public Made by Adom

by adom

UMW RS-485 / RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs sn75176bdr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 11d ago
README.md sn75176bdr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 15d ago
sn75176bdr-etched.fit.json sn75176bdr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
sn75176bdr-etched.glb sn75176bdr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
sn75176bdr-etched.step sn75176bdr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
sn75176bdr.glb Publish 0.1.0 · Ray 1mo ago
sn75176bdr.kicad_mod Publish 0.1.0 · Ray 1mo ago
sn75176bdr.kicad_sym Publish 0.1.0 · Ray 1mo ago
sn75176bdr.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 8 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
sn75176bdr.step Publish 0.1.0 · Ray 1mo ago

SN75176BDR

UMW · RS-485 / RS-422 ICs · SOP-8

SN75176BDR 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 Logic data output from the RS-485 receiver. CMOS-compatible output driven from the differential comparator on A/B; high when V_ID = V_A - V_B > +200mV, low when < -200mV. High-impedance when /RE is deasserted (high).
2 /RE input Receiver enable, active low. Drive low to enable the receiver output R; drive high to place R in high-impedance. Can be tied with DE to form a direction-control signal.
3 DE input Driver enable, active high. Drive high to enable the differential driver onto bus pins A/B; drive low to place the driver in high-impedance so the bus can be used by other transceivers.
4 D input Logic data input to the RS-485 driver. When DE is high, a logic-high on D drives A high and B low; a logic-low drives A low and B high. V_IH = 2V min, V_IL = 0.8V max.
5 GND power_in Device ground pin (0V reference).
6 A bidirectional Non-inverting RS-422/RS-485 differential bus line. Serves as driver output when DE is high and as receiver input when /RE is low. Withstands -7V to +12V common-mode; receiver input impedance ≥12kΩ.
7 B bidirectional Inverting RS-422/RS-485 differential bus line. Serves as driver output when DE is high and as receiver input when /RE is low. Withstands -7V to +12V common-mode; receiver input impedance ≥12kΩ.
8 VCC power_in Positive supply input. Connect to a single 5V supply (4.75V to 5.25V recommended; 7V absolute max). Typical I_CC 42mA with outputs enabled.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SN75176BDRD
  • SN75176BDR
  • SN75176BDRP
  • SN75176BDRPS

CAD (KiCad official)

  • Symbol: SN75176BDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: sn75176bdr-etched.step / sn75176bdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn75176bdr.step / sn75176bdr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sn75176bdr.step 122 KB You want the bare part, or you mark your own boards.
sn75176bdr-etched.step 2.0 MB You want the part with SN75176BDR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 510 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 (30 pp, sha256 6967824b2ea2d976, 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