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SN74HCT273DWR

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Texas Instruments Flip Flops, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs sn74hct273dwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
viewers sn74hct273dwr: viewers · Ray 12d ago
package.json Publish 0.1.0 · Ray 12d ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 10d ago
README.md Initial commit: component/sn74hct273dwr · Ray 12d ago
sn74hct273dwr-etched.fit.json sn74hct273dwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
sn74hct273dwr-etched.glb sn74hct273dwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
sn74hct273dwr-etched.step sn74hct273dwr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
sn74hct273dwr.glb Publish 0.1.0 · Ray 12d ago
sn74hct273dwr.kicad_mod Publish 0.1.0 · Ray 12d ago
sn74hct273dwr.kicad_sym Publish 0.1.0 · Ray 12d ago
sn74hct273dwr.lbr Publish 0.1.0 · Ray 12d ago
sn74hct273dwr.step Publish 0.1.0 · Ray 12d ago

SN74HCT273DWR

Texas Instruments · Flip Flops · SOIC-20-300mil

SN74HCT273DWR from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CLR input Asynchronous clear input, active low; clears all flip-flop outputs to logic low.
2 1Q output Channel 1 Q output; provides the latched logic state from the D flip-flop.
3 1D input Channel 1 D input; data sampled at rising edge of CLK when CLR is high.
4 2D input Channel 2 D input; data sampled at rising edge of CLK when CLR is high.
5 2Q output Channel 2 Q output; provides the latched logic state from the D flip-flop.
6 3Q output Channel 3 Q output; provides the latched logic state from the D flip-flop.
7 3D input Channel 3 D input; data sampled at rising edge of CLK when CLR is high.
8 4D input Channel 4 D input; data sampled at rising edge of CLK when CLR is high.
9 4Q output Channel 4 Q output; provides the latched logic state from the D flip-flop.
10 GND power_in Ground; device power supply return path.
11 CLK input Clock input for all channels, rising edge triggered; samples all D inputs when CLR is high.
12 5Q output Channel 5 Q output; provides the latched logic state from the D flip-flop.
13 5D input Channel 5 D input; data sampled at rising edge of CLK when CLR is high.
14 6D input Channel 6 D input; data sampled at rising edge of CLK when CLR is high.
15 6Q output Channel 6 Q output; provides the latched logic state from the D flip-flop.
16 7Q output Channel 7 Q output; provides the latched logic state from the D flip-flop.
17 7D input Channel 7 D input; data sampled at rising edge of CLK when CLR is high.
18 8D input Channel 8 D input; data sampled at rising edge of CLK when CLR is high.
19 8Q output Channel 8 Q output; provides the latched logic state from the D flip-flop.
20 VCC power_in Positive power supply; operating range 4.5V to 5.5V per recommended operating conditions.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-300mil
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74HCT273DWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn74hct273dwr-etched.step / sn74hct273dwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hct273dwr.step / sn74hct273dwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 be4aa8926dc70c63, retrieved 2026-09-23, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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