component

SN65HVD78DR

Public Made by Adom

by adom

Texas Instruments RS-485 / RS-422 ICs, SOIC-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 sn65hvd78dr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
viewers sn65hvd78dr: viewers · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
page.json sn65hvd78dr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 19h ago
README.md sn65hvd78dr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 19d ago
sn65hvd78dr-etched.fit.json sn65hvd78dr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
sn65hvd78dr-etched.glb sn65hvd78dr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
sn65hvd78dr-etched.step sn65hvd78dr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 5d ago
sn65hvd78dr.glb Publish 0.1.0 · Ray 1mo ago
sn65hvd78dr.kicad_mod Publish 0.1.0 · Ray 1mo ago
sn65hvd78dr.kicad_sym Publish 0.1.0 · Ray 1mo ago
sn65hvd78dr.lbr Publish 0.1.0 · Ray 1mo ago
sn65hvd78dr.step Publish 0.1.0 · Ray 1mo ago

SN65HVD78DR

Texas Instruments · RS-485 / RS-422 ICs · SOIC-8

SN65HVD78DR 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 Receive data output. CMOS-level output driven from the differential receiver comparing bus pins A and B. Output current range +/-8 mA.
2 RE input Active-low receiver enable. When low, the receiver output R is enabled; when high, R is high-impedance. Tie low with DE low for standby.
3 DE input Active-high driver enable. When high, the differential driver on A/B is enabled; when low, driver outputs are high-impedance.
4 D input Driver data input. CMOS-level logic input driving the differential bus outputs A and B when DE is asserted. 5-V tolerant.
5 GND power_in Local device ground / reference potential.
6 A bidirectional Non-inverting RS-485 differential bus I/O. Driver output or receiver input, complementary to B. Wide common-mode range (-7 V to 12 V) and robust bus ESD.
7 B bidirectional Inverting RS-485 differential bus I/O. Driver output or receiver input, complementary to A. Wide common-mode range (-7 V to 12 V) and robust bus ESD.
8 VCC power_in Supply voltage, 3.0 V to 3.6 V (3.3 V nominal). Bypass to GND with a local 100 nF ceramic capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SN65HVD78DR
  • SN65HVD78DRD
  • SN65HVD78DRDGK
  • SN65HVD78DRDGKR
  • SN65HVD78DRB
  • SN65HVD78DRBR

CAD (KiCad official)

  • Symbol: SN65HVD78DR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: sn65hvd78dr-etched.step / sn65hvd78dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn65hvd78dr.step / sn65hvd78dr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sn65hvd78dr.step 122 KB You want the bare part, or you mark your own boards.
sn65hvd78dr-etched.step 2.3 MB You want the part with SN65HVD78DR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 558 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: Texas Instruments datasheet (47 pp, sha256 b46f5803fa8302f9, 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