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SN74ABT240ADWR
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-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
markdownSN74ABT240ADWR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SOIC-20
SN74ABT240ADWR from Texas Instruments, in a SOIC-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 output enable for buffers 1Y1 to 1Y4; when high, outputs 1Y1 to 1Y4 are forced to the high-impedance state. |
| 2 | 1A1 | input | Data input to buffer 1; when 1OE is low, the inverted data appears on 1Y1, and unused inputs must be held at VCC or GND. |
| 3 | 2Y4 | tri_state | 3-state output of buffer 2 (channel 4), inverted from 2A4 when 2OE is low and high-impedance when 2OE is high. |
| 4 | 1A2 | input | Data input to buffer 1 (channel 2), inverted to 1Y2 when 1OE is low; unused inputs must be held at VCC or GND. |
| 5 | 2Y3 | tri_state | 3-state output of buffer 2 (channel 3), inverted from 2A3 when 2OE is low and high-impedance when 2OE is high. |
| 6 | 1A3 | input | Data input to buffer 1 (channel 3), inverted to 1Y3 when 1OE is low; unused inputs must be held at VCC or GND. |
| 7 | 2Y2 | tri_state | 3-state output of buffer 2 (channel 2), inverted from 2A2 when 2OE is low and high-impedance when 2OE is high. |
| 8 | 1A4 | input | Data input to buffer 1 (channel 4), inverted to 1Y4 when 1OE is low; unused inputs must be held at VCC or GND. |
| 9 | 2Y1 | tri_state | 3-state output of buffer 2 (channel 1), inverted from 2A1 when 2OE is low and high-impedance when 2OE is high. |
| 10 | GND | power_in | Device ground reference. |
| 11 | 2A1 | input | Data input to buffer 2 (channel 1), inverted to 2Y1 when 2OE is low; unused inputs must be held at VCC or GND. |
| 12 | 1Y4 | tri_state | 3-state output of buffer 1 (channel 4), inverted from 1A4 when 1OE is low and high-impedance when 1OE is high. |
| 13 | 2A2 | input | Data input to buffer 2 (channel 2), inverted to 2Y2 when 2OE is low; unused inputs must be held at VCC or GND. |
| 14 | 1Y3 | tri_state | 3-state output of buffer 1 (channel 3), inverted from 1A3 when 1OE is low and high-impedance when 1OE is high. |
| 15 | 2A3 | input | Data input to buffer 2 (channel 3), inverted to 2Y3 when 2OE is low; unused inputs must be held at VCC or GND. |
| 16 | 1Y2 | tri_state | 3-state output of buffer 1 (channel 2), inverted from 1A2 when 1OE is low and high-impedance when 1OE is high. |
| 17 | 2A4 | input | Data input to buffer 2 (channel 4), inverted to 2Y4 when 2OE is low; unused inputs must be held at VCC or GND. |
| 18 | 1Y1 | tri_state | 3-state output of buffer 1 (channel 1), inverted from 1A1 when 1OE is low and high-impedance when 1OE is high. |
| 19 | 2OE | input | Active-low output enable for buffers 2Y1 to 2Y4; when high, outputs 2Y1 to 2Y4 are forced to the high-impedance state. |
| 20 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V recommended; OE should be tied to VCC through a pullup resistor to hold outputs high-impedance during power up or down. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74ABT240ADWR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20 (KiCad packages3D, STEP)
- 3D model files:
sn74abt240adwr-etched.step/sn74abt240adwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74abt240adwr.step/sn74abt240adwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (26 pp, sha256
809f246e9ce5e1ce, retrieved 2026-10-11, tier: lcsc) - 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).