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SN74ABT543ADWR

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74ABT543ADWR

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SOIC-24

SN74ABT543ADWR from Texas Instruments, in a SOIC-24. 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 LEBA input B-to-A latch enable; when LEBA is low with CEBA low the B-to-A latches are transparent, and a low-to-high transition puts them in storage mode.
2 OEBA input B-to-A output enable; the A outputs are active only when CEBA and OEBA are both low, and OE should be tied to VCC through a pullup resistor to keep the outputs high-impedance during power up or power down.
3 A1 bidirectional A-side 3-state data port, bit 1, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
4 A2 bidirectional A-side 3-state data port, bit 2, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
5 A3 bidirectional A-side 3-state data port, bit 3, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
6 A4 bidirectional A-side 3-state data port, bit 4, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
7 A5 bidirectional A-side 3-state data port, bit 5, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
8 A6 bidirectional A-side 3-state data port, bit 6, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
9 A7 bidirectional A-side 3-state data port, bit 7, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
10 A8 bidirectional A-side 3-state data port, bit 8, which feeds the A-to-B latches and is driven by the B-to-A path when enabled.
11 CEAB input A-to-B enable; must be low to enter data from A or to output data from B.
12 GND power_in Ground reference for the device.
13 OEAB input A-to-B output enable; with CEAB and OEAB both low, the 3-state B outputs are active, and OE should be tied to VCC through a pullup resistor to keep outputs high-impedance during power up or power down.
14 LEAB input A-to-B latch enable; when LEAB and CEAB are low the A-to-B latches are transparent, and a low-to-high transition of LEAB puts the A latches in storage mode.
15 B8 bidirectional B-side 3-state data port, bit 8, which drives the B outputs when CEAB and OEAB are both low.
16 B7 bidirectional B-side 3-state data port, bit 7, which drives the B outputs when CEAB and OEAB are both low.
17 B6 bidirectional B-side 3-state data port, bit 6, which drives the B outputs when CEAB and OEAB are both low.
18 B5 bidirectional B-side 3-state data port, bit 5, which drives the B outputs when CEAB and OEAB are both low.
19 B4 bidirectional B-side 3-state data port, bit 4, which drives the B outputs when CEAB and OEAB are both low.
20 B3 bidirectional B-side 3-state data port, bit 3, which drives the B outputs when CEAB and OEAB are both low.
21 B2 bidirectional B-side 3-state data port, bit 2, which drives the B outputs when CEAB and OEAB are both low.
22 B1 bidirectional B-side 3-state data port, bit 1, which drives the B outputs when CEAB and OEAB are both low.
23 CEBA input B-to-A enable; must be low to enter data from B or to output data from A.
24 VCC power_in Supply voltage, recommended operating range 4.5 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-24
Category Logic
Pins 24

CAD (KiCad official)

  • Symbol: SN74ABT543ADWR
  • Footprint: Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm
  • 3D model: SOIC-24 (KiCad packages3D, STEP)
  • 3D model files: sn74abt543adwr-etched.step / sn74abt543adwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74abt543adwr.step / sn74abt543adwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (20 pp, sha256 cd4defbd194ff8d2, retrieved 2026-10-11, tier: lcsc)
  • 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