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CD74HCT240PWR
Public Made by Adomby adom
Texas Instruments 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
markdownCD74HCT240PWR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
CD74HCT240PWR 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 | 1OE | input | Active-low three-state output enable for the group 1 buffers (1Y0-1Y3). |
| 2 | 1A0 | input | Buffered data input 0 of group 1, inverted to pin 18 in the '240. |
| 3 | 2Y3 | tri_state | Three-state inverting output 3 of group 2, driven from 2A3. |
| 4 | 1A1 | input | Buffered data input 1 of group 1, inverted to pin 16 in the '240. |
| 5 | 2Y2 | tri_state | Three-state inverting output 2 of group 2, driven from 2A2. |
| 6 | 1A2 | input | Buffered data input 2 of group 1, inverted to pin 14 in the '240. |
| 7 | 2Y1 | tri_state | Three-state inverting output 1 of group 2, driven from 2A1. |
| 8 | 1A3 | input | Buffered data input 3 of group 1, inverted to pin 12 in the '240. |
| 9 | 2Y0 | tri_state | Three-state inverting output 0 of group 2, driven from 2A0. |
| 10 | GND | power_in | Ground. |
| 11 | 2A0 | input | Buffered data input 0 of group 2, inverted to pin 9 in the '240. |
| 12 | 1Y3 | tri_state | Three-state inverting output 3 of group 1, driven from 1A3. |
| 13 | 2A1 | input | Buffered data input 1 of group 2, inverted to pin 7 in the '240. |
| 14 | 1Y2 | tri_state | Three-state inverting output 2 of group 1, driven from 1A2. |
| 15 | 2A2 | input | Buffered data input 2 of group 2, inverted to pin 5 in the '240. |
| 16 | 1Y1 | tri_state | Three-state inverting output 1 of group 1, driven from 1A1. |
| 17 | 2A3 | input | Buffered data input 3 of group 2, inverted to pin 3 in the '240. |
| 18 | 1Y0 | tri_state | Three-state inverting output 0 of group 1, driven from 1A0. |
| 19 | 2OE | input | Active-low three-state output enable for the group 2 buffers (2Y0-2Y3) in the '240. |
| 20 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V for HCT types, with a 0.1-µF bypass capacitor recommended close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
CD74HCT240PWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
cd74hct240pwr-etched.step/cd74hct240pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hct240pwr.step/cd74hct240pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
46be7e24bb9dfe79, retrieved 2026-10-01, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).