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SN74AHCT240DWR
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, 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
markdownSN74AHCT240DWR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil
SN74AHCT240DWR 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 | 1OE | input | Output Enable 1 input; active low enables inverted outputs from 1A inputs to 1Y outputs. |
| 2 | 1A1 | input | 1A1 input to inverting buffer 1. |
| 3 | 2Y4 | tri_state | 2Y4 inverted output from buffer 2; high-impedance when 2OE is high. |
| 4 | 1A2 | input | 1A2 input to inverting buffer 1. |
| 5 | 2Y3 | tri_state | 2Y3 inverted output from buffer 2; high-impedance when 2OE is high. |
| 6 | 1A3 | input | 1A3 input to inverting buffer 1. |
| 7 | 2Y2 | tri_state | 2Y2 inverted output from buffer 2; high-impedance when 2OE is high. |
| 8 | 1A4 | input | 1A4 input to inverting buffer 1. |
| 9 | 2Y1 | tri_state | 2Y1 inverted output from buffer 2; high-impedance when 2OE is high. |
| 10 | GND | power_in | Ground connection. |
| 11 | 2A1 | input | 2A1 input to inverting buffer 2. |
| 12 | 1Y4 | tri_state | 1Y4 inverted output from buffer 1; high-impedance when 1OE is high. |
| 13 | 2A2 | input | 2A2 input to inverting buffer 2. |
| 14 | 1Y3 | tri_state | 1Y3 inverted output from buffer 1; high-impedance when 1OE is high. |
| 15 | 2A3 | input | 2A3 input to inverting buffer 2. |
| 16 | 1Y2 | tri_state | 1Y2 inverted output from buffer 1; high-impedance when 1OE is high. |
| 17 | 2A4 | input | 2A4 input to inverting buffer 2. |
| 18 | 1Y1 | tri_state | 1Y1 inverted output from buffer 1; high-impedance when 1OE is high. |
| 19 | 2OE | input | Output Enable 2 input; active low enables inverted outputs from 2A inputs to 2Y outputs. |
| 20 | VCC | power_in | Supply voltage (4.5 V to 5.5 V recommended operating range). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74AHCT240DWR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
sn74ahct240dwr-etched.step/sn74ahct240dwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ahct240dwr.step/sn74ahct240dwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (43 pp, sha256
22bf38e7057644c4, retrieved 2026-09-26, 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).