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SN74ABT543ADBR

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

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SN74ABT543ADBR

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

SN74ABT543ADBR from Texas Instruments, in a SSOP-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 Latch-enable input for the B-to-A latches; when CEBA and LEBA are low the B-to-A latches are transparent, and a low-to-high transition of LEBA puts them in storage mode.
2 OEBA input Output-enable input for the B-to-A path; with CEBA and OEBA both low the 3-state A outputs are active, 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-port data line 1 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
4 A2 bidirectional A-port data line 2 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
5 A3 bidirectional A-port data line 3 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
6 A4 bidirectional A-port data line 4 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
7 A5 bidirectional A-port data line 5 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
8 A6 bidirectional A-port data line 6 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
9 A7 bidirectional A-port data line 7 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
10 A8 bidirectional A-port data line 8 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
11 CEAB input Active-low A-to-B enable input that must be low to enter data from A or to output data from B.
12 GND power_in Ground reference pin for the device.
13 OEAB input Output-enable input for the A-to-B path; with CEAB and OEAB both low the 3-state B outputs are active and reflect the data at the A latch outputs.
14 LEAB input Latch-enable input for the A-to-B latches; when CEAB and LEAB are low the A-to-B latches are transparent, and a low-to-high transition of LEAB puts them in storage mode.
15 B8 bidirectional B-port data line 8 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
16 B7 bidirectional B-port data line 7 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
17 B6 bidirectional B-port data line 6 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
18 B5 bidirectional B-port data line 5 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
19 B4 bidirectional B-port data line 4 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
20 B3 bidirectional B-port data line 3 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
21 B2 bidirectional B-port data line 2 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
22 B1 bidirectional B-port data line 1 of the octal transceiver, with 3-state high-drive outputs rated for -32 mA IOH and 64 mA IOL.
23 CEBA input Active-low B-to-A enable input that must be low to enter data from B or to output data from A.
24 VCC power_in Supply voltage pin; the recommended supply range for the SN74ABT543A is 4.5 V to 5.5 V.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74ABT543ADBR
  • Footprint: Package_SO:SSOP-24_5.3x8.2mm_P0.65mm
  • 3D model: SSOP-24 (KiCad packages3D, STEP)
  • 3D model files: sn74abt543adbr-etched.step / sn74abt543adbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74abt543adbr.step / sn74abt543adbr.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 2026-10-09, 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