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SN74AHCT245PWR

Public Made by Adom

by adom

Texas Instruments Buffer/Driver/Transceiver, TSSOP-20. 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 sn74ahct245pwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json sn74ahct245pwr: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray
README.md sn74ahct245pwr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray
sn74ahct245pwr-etched.fit.json sn74ahct245pwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
sn74ahct245pwr-etched.glb sn74ahct245pwr: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray
sn74ahct245pwr-etched.step sn74ahct245pwr: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC b… · Ray
sn74ahct245pwr.glb Publish 0.1.0 · Ray
sn74ahct245pwr.kicad_mod Publish 0.1.0 · Ray
sn74ahct245pwr.kicad_sym Publish 0.1.0 · Ray
sn74ahct245pwr.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
sn74ahct245pwr.step Publish 0.1.0 · Ray

SN74AHCT245PWR

Texas Instruments · Buffer/Driver/Transceiver · TSSOP-20

SN74AHCT245PWR from Texas Instruments, in a TSSOP-20. 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 DIR input Direction control input. DIR=L transfers B->A; DIR=H transfers A->B (when OE is low).
2 A1 bidirectional Channel 1 A-side bus I/O. Direction set by DIR; high-Z when OE is high.
3 A2 bidirectional Channel 2 A-side bus I/O.
4 A3 bidirectional Channel 3 A-side bus I/O.
5 A4 bidirectional Channel 4 A-side bus I/O.
6 A5 bidirectional Channel 5 A-side bus I/O.
7 A6 bidirectional Channel 6 A-side bus I/O.
8 A7 bidirectional Channel 7 A-side bus I/O.
9 A8 bidirectional Channel 8 A-side bus I/O.
10 GND power_in Ground reference (0 V).
11 B8 bidirectional Channel 8 B-side bus I/O.
12 B7 bidirectional Channel 7 B-side bus I/O.
13 B6 bidirectional Channel 6 B-side bus I/O.
14 B5 bidirectional Channel 5 B-side bus I/O.
15 B4 bidirectional Channel 4 B-side bus I/O.
16 B3 bidirectional Channel 3 B-side bus I/O.
17 B2 bidirectional Channel 2 B-side bus I/O.
18 B1 bidirectional Channel 1 B-side bus I/O.
19 OE input Active-low output enable. When OE is high, both A and B buses are placed in the high-impedance (isolation) state. Should be tied to VCC through a pullup during power up/down.
20 VCC power_in Positive supply, 4.5 V to 5.5 V recommended (7 V absolute max).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Logic
Pins 20

Ordering variants

Same part, different packaging or reel option.

  • SN74AHCT245PWR
  • SN74AHCT245PWRDB
  • SN74AHCT245PWRDBR
  • SN74AHCT245PWRDGV
  • SN74AHCT245PWRDGVR
  • SN74AHCT245PWRDW
  • SN74AHCT245PWRDWR
  • SN74AHCT245PWRN
  • SN74AHCT245PWRNS
  • SN74AHCT245PWRNSR
  • SN74AHCT245PWRDGS
  • SN74AHCT245PWRDGSR
  • SN74AHCT245PWRRGY
  • SN74AHCT245PWRRGYR
  • SN74AHCT245PWRRKS
  • SN74AHCT245PWRRKSR
  • SN74AHCT245PWRJ
  • SN74AHCT245PWRW
  • SN74AHCT245PWRFK

CAD (KiCad official)

  • Symbol: SN74AHCT245PWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74ahct245pwr-etched.step / sn74ahct245pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahct245pwr.step / sn74ahct245pwr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sn74ahct245pwr.step 267 KB You want the bare part, or you mark your own boards.
sn74ahct245pwr-etched.step 3.0 MB You want the part with SN74AHCT245PWR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 768 faces against 327 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 (44 pp, sha256 9e7c1b200cdefd3d, 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