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SN74ABT240APWR

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74ABT240APWR

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74ABT240APWR 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 output enable for buffer section 1; when low, outputs 1Y1 to 1Y4 pass inverted data from 1A1 to 1A4, and when high, they are in the high-impedance state.
2 1A1 input Data input to buffer section 1, inverted to output 1Y1 when 1OE is low; unused inputs must be held at VCC or GND.
3 2Y4 tri_state 3-state output of buffer section 2, the inverted version of 2A4 when 2OE is low and high-impedance when 2OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
4 1A2 input Data input to buffer section 1, inverted to output 1Y2 when 1OE is low; unused inputs must be held at VCC or GND.
5 2Y3 tri_state 3-state output of buffer section 2, the inverted version of 2A3 when 2OE is low and high-impedance when 2OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
6 1A3 input Data input to buffer section 1, inverted to output 1Y3 when 1OE is low; unused inputs must be held at VCC or GND.
7 2Y2 tri_state 3-state output of buffer section 2, the inverted version of 2A2 when 2OE is low and high-impedance when 2OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
8 1A4 input Data input to buffer section 1, inverted to output 1Y4 when 1OE is low; unused inputs must be held at VCC or GND.
9 2Y1 tri_state 3-state output of buffer section 2, the inverted version of 2A1 when 2OE is low and high-impedance when 2OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
10 GND power_in Ground reference for the device.
11 2A1 input Data input to buffer section 2, inverted to output 2Y1 when 2OE is low; unused inputs must be held at VCC or GND.
12 1Y4 tri_state 3-state output of buffer section 1, the inverted version of 1A4 when 1OE is low and high-impedance when 1OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
13 2A2 input Data input to buffer section 2, inverted to output 2Y2 when 2OE is low; unused inputs must be held at VCC or GND.
14 1Y3 tri_state 3-state output of buffer section 1, the inverted version of 1A3 when 1OE is low and high-impedance when 1OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
15 2A3 input Data input to buffer section 2, inverted to output 2Y3 when 2OE is low; unused inputs must be held at VCC or GND.
16 1Y2 tri_state 3-state output of buffer section 1, the inverted version of 1A2 when 1OE is low and high-impedance when 1OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
17 2A4 input Data input to buffer section 2, inverted to output 2Y4 when 2OE is low; unused inputs must be held at VCC or GND.
18 1Y1 tri_state 3-state output of buffer section 1, the inverted version of 1A1 when 1OE is low and high-impedance when 1OE is high; high-drive, rated -32 mA IOH and 64 mA IOL for SN74ABT240A.
19 2OE input Active-low output enable for buffer section 2; when low, outputs 2Y1 to 2Y4 pass inverted data from 2A1 to 2A4, and when high, they are in the high-impedance state.
20 VCC power_in Supply voltage, 4.5 V minimum to 5.5 V maximum per recommended operating conditions.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74ABT240APWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74abt240apwr-etched.step / sn74abt240apwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74abt240apwr.step / sn74abt240apwr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (26 pp, sha256 809f246e9ce5e1ce, retrieved 2026-10-07, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF