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SN74AHC245DWR

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Texas Instruments Buffer/Driver/Transceiver, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74AHC245DWR

Texas Instruments · Buffer/Driver/Transceiver · SOIC-20-300mil

SN74AHC245DWR from Texas Instruments, in a SOIC-20-300mil. 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 that sets whether data transfers from A to B or from B to A; the datasheet specifies inputs (OE or DIR) up to 5.5 V.
2 A1 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
3 A2 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
4 A3 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
5 A4 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
6 A5 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
7 A6 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
8 A7 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
9 A8 bidirectional A-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
10 GND power_in Ground reference pin for the device.
11 B8 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
12 B7 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
13 B6 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
14 B5 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
15 B4 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
16 B3 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
17 B2 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
18 B1 bidirectional B-side bidirectional data input/output; output drive is limited to VCC, with IOH of -8 mA and IOL of 8 mA at VCC = 5 V ±0.5 V.
19 OE input Output enable control; when set it disables the output section of the I/O ports, the input sections stay active, so the I/O pins must not float.
20 VCC power_in Supply pin; operating range 2 V to 5.5 V, with a 0.1 µF bypass capacitor placed close to the pin recommended.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-300mil
Category Logic ICs
Pins 20

CAD (KiCad official)

  • Symbol: SN74AHC245DWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn74ahc245dwr-etched.step / sn74ahc245dwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahc245dwr.step / sn74ahc245dwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (43 pp, sha256 96c121e7cdb9f118, retrieved 2026-10-07, 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-5-5 (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