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SN74ABT273DBR

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Texas Instruments Flip Flops, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74ABT273DBR

Texas Instruments · Flip Flops · SSOP-20-208mil

SN74ABT273DBR from Texas Instruments, in a SSOP-20-208mil. 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 CLR input Active-low direct clear; when low, all Q outputs are forced low regardless of CLK or D.
2 1Q output Q output of flip-flop 1; high-drive output rated for -32 mA IOH and 64 mA IOL.
3 1D input Data input of flip-flop 1; must meet setup and hold times relative to the positive-going CLK edge.
4 2D input Data input of flip-flop 2; must meet setup and hold times relative to the positive-going CLK edge.
5 2Q output Q output of flip-flop 2; high-drive output rated for -32 mA IOH and 64 mA IOL.
6 3Q output Q output of flip-flop 3; high-drive output rated for -32 mA IOH and 64 mA IOL.
7 3D input Data input of flip-flop 3; must meet setup and hold times relative to the positive-going CLK edge.
8 4D input Data input of flip-flop 4; must meet setup and hold times relative to the positive-going CLK edge.
9 4Q output Q output of flip-flop 4; high-drive output rated for -32 mA IOH and 64 mA IOL.
10 GND power_in Ground reference for the device.
11 CLK input Clock input; D is transferred to Q on the positive-going edge and has no effect while CLK is high or low.
12 5Q output Q output of flip-flop 5; high-drive output rated for -32 mA IOH and 64 mA IOL.
13 5D input Data input of flip-flop 5; must meet setup and hold times relative to the positive-going CLK edge.
14 6D input Data input of flip-flop 6; must meet setup and hold times relative to the positive-going CLK edge.
15 6Q output Q output of flip-flop 6; high-drive output rated for -32 mA IOH and 64 mA IOL.
16 7Q output Q output of flip-flop 7; high-drive output rated for -32 mA IOH and 64 mA IOL.
17 7D input Data input of flip-flop 7; must meet setup and hold times relative to the positive-going CLK edge.
18 8D input Data input of flip-flop 8; must meet setup and hold times relative to the positive-going CLK edge.
19 8Q output Q output of flip-flop 8; high-drive output rated for -32 mA IOH and 64 mA IOL.
20 VCC power_in Supply voltage; recommended operating range 4.5 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-20-208mil
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74ABT273DBR
  • Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
  • 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
  • 3D model files: sn74abt273dbr-etched.step / sn74abt273dbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74abt273dbr.step / sn74abt273dbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (26 pp, sha256 60de3f9efa6292e1, 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