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SN74AHC245DWR
Public Made by Adomby adom
Texas Instruments Buffer/Driver/Transceiver, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74AHC245DWR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ahc245dwr.step/sn74ahc245dwr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).