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SN74AHC245QPWRQ1

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs sn74ahc245qpwrq1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 12h ago
viewers sn74ahc245qpwrq1: viewers · Ray 4d ago
package.json Publish 0.1.0 · Ray 4d ago
page.json sn74ahc245qpwrq1: annotated 3D hero (adom-hero 1.4) · Ray 12h ago
README.md sn74ahc245qpwrq1: annotated 3D hero (adom-hero 1.4) · Ray 12h ago
sn74ahc245qpwrq1-etched.fit.json sn74ahc245qpwrq1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 12h ago
sn74ahc245qpwrq1-etched.glb sn74ahc245qpwrq1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 12h ago
sn74ahc245qpwrq1-etched.step sn74ahc245qpwrq1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 12h ago
sn74ahc245qpwrq1-hero.glb sn74ahc245qpwrq1: annotated 3D hero (adom-hero 1.4) · Ray 12h ago
sn74ahc245qpwrq1-hero.overlay.json sn74ahc245qpwrq1: annotated 3D hero (adom-hero 1.4) · Ray 12h ago
sn74ahc245qpwrq1.glb Publish 0.1.0 · Ray 4d ago
sn74ahc245qpwrq1.kicad_mod Publish 0.1.0 · Ray 4d ago
sn74ahc245qpwrq1.kicad_sym Publish 0.1.0 · Ray 4d ago
sn74ahc245qpwrq1.lbr Publish 0.1.0 · Ray 4d ago
sn74ahc245qpwrq1.step Publish 0.1.0 · Ray 4d ago

SN74AHC245QPWRQ1

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74AHC245QPWRQ1 from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 DIR input Direction control input; L = B to A, H = A to B.
2 A1 bidirectional Channel 1 output/input A; bidirectional data bus.
3 A2 bidirectional Channel 2 output/input A; bidirectional data bus.
4 A3 bidirectional Channel 3 output/input A; bidirectional data bus.
5 A4 bidirectional Channel 4 output/input A; bidirectional data bus.
6 A5 bidirectional Channel 5 output/input A; bidirectional data bus.
7 A6 bidirectional Channel 6 output/input A; bidirectional data bus.
8 A7 bidirectional Channel 7 output/input A; bidirectional data bus.
9 A8 bidirectional Channel 8 output/input A; bidirectional data bus.
10 GND power_in Ground; device ground connection.
11 B8 bidirectional Channel 8 input/output B; bidirectional data bus.
12 B7 bidirectional Channel 7 input/output B; bidirectional data bus.
13 B6 bidirectional Channel 6 input/output B; bidirectional data bus.
14 B5 bidirectional Channel 5 input/output B; bidirectional data bus.
15 B4 bidirectional Channel 4 input/output B; bidirectional data bus.
16 B3 bidirectional Channel 3 input/output B; bidirectional data bus.
17 B2 bidirectional Channel 2 input/output B; bidirectional data bus.
18 B1 bidirectional Channel 1 input/output B; bidirectional data bus.
19 OE input Output enable control input, active low; disables outputs when high.
20 VCC power_in Positive power supply; operating range 2V to 5.5V.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74AHC245QPWRQ1
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • Annotated 3D hero: sn74ahc245qpwrq1-hero.glb (dashed pad outlines, silkscreen with pin 1, signal names; the adom-hero standard) is what the viewer shows. Downloads and EDA use the clean model, sn74ahc245qpwrq1-etched.glb.
  • 3D model files: sn74ahc245qpwrq1-etched.step / sn74ahc245qpwrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahc245qpwrq1.step / sn74ahc245qpwrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (29 pp, sha256 eef5b42b00431f86, retrieved 2026-10-02, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF