component
74HC245KAJ
Public Made by Adomby adom
Shenzhen Fuman Buffers, Drivers, Receivers, Transceivers, TSSOP-20. 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
markdown74HC245KAJ
Shenzhen Fuman · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
74HC245KAJ from Shenzhen Fuman, 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; selects data path direction (low = B to A, high = A to B). |
| 2 | A1 | bidirectional | Data input/output terminal A1; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 3 | A2 | bidirectional | Data input/output terminal A2; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 4 | A3 | bidirectional | Data input/output terminal A3; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 5 | A4 | bidirectional | Data input/output terminal A4; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 6 | A5 | bidirectional | Data input/output terminal A5; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 7 | A6 | bidirectional | Data input/output terminal A6; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 8 | A7 | bidirectional | Data input/output terminal A7; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 9 | A8 | bidirectional | Data input/output terminal A8; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high. |
| 10 | GND | power_in | Logic ground (0 V reference). |
| 11 | B8 | bidirectional | Data input/output terminal B8; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 12 | B7 | bidirectional | Data input/output terminal B7; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 13 | B6 | bidirectional | Data input/output terminal B6; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 14 | B5 | bidirectional | Data input/output terminal B5; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 15 | B4 | bidirectional | Data input/output terminal B4; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 16 | B3 | bidirectional | Data input/output terminal B3; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 17 | B2 | bidirectional | Data input/output terminal B2; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 18 | B1 | bidirectional | Data input/output terminal B1; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high. |
| 19 | /OE | input | Output enable input (active low); when low enables tri-state outputs, when high places A and B buses in high impedance. |
| 20 | VCC | power_in | Logic power supply; operates from 3.0 to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
74HC245KAJ - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
74hc245kaj-etched.step/74hc245kaj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc245kaj.step/74hc245kaj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen Fuman datasheet (8 pp, sha256
8547b64d6a0bcdd9, retrieved 2026-09-17, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).