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CD74HC173PWR

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Texas Instruments Flip Flops, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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CD74HC173PWR

Texas Instruments · Flip Flops · TSSOP-16

CD74HC173PWR from Texas Instruments, in a TSSOP-16. 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 ~OE1 input Active-low output enable 1; when HIGH, all Q outputs are forced to the high-impedance (three-state) condition regardless of flip-flop state.
2 ~OE2 input Active-low output enable 2; when HIGH, all Q outputs are forced to the high-impedance (three-state) condition regardless of flip-flop state.
3 Q0 tri_state Three-state buffered output of flip-flop 0; VOH ≥ 3.84 V and VOL ≤ 0.33 V at IOH = -6 mA / IOL = 6 mA, VCC = 4.5 V, 85 °C; high-impedance when OE1 or OE2 is HIGH.
4 Q1 tri_state Three-state buffered output of flip-flop 1; VOH ≥ 3.84 V and VOL ≤ 0.33 V at IOH = -6 mA / IOL = 6 mA, VCC = 4.5 V, 85 °C; high-impedance when OE1 or OE2 is HIGH.
5 Q2 tri_state Three-state buffered output of flip-flop 2; VOH ≥ 3.84 V and VOL ≤ 0.33 V at IOH = -6 mA / IOL = 6 mA, VCC = 4.5 V, 85 °C; high-impedance when OE1 or OE2 is HIGH.
6 Q3 tri_state Three-state buffered output of flip-flop 3; VOH ≥ 3.84 V and VOL ≤ 0.33 V at IOH = -6 mA / IOL = 6 mA, VCC = 4.5 V, 85 °C; high-impedance when OE1 or OE2 is HIGH.
7 CP input Clock input (shared by all four flip-flops); data is captured on the positive-going edge; minimum clock pulse width 16 ns at VCC = 4.5 V, 85 °C.
8 GND power_in Ground supply reference; continuous current through GND pin must not exceed ±70 mA absolute maximum.
9 E1 input Data enable input 1; when HIGH, the Q output is fed back to the D input, forcing the flip-flop to retain its current state on the next clock edge.
10 E2 input Data enable input 2; when HIGH, the Q output is fed back to the D input, forcing the flip-flop to retain its current state on the next clock edge.
11 D3 input Data input for flip-flop 3; sampled on the positive-going clock edge when E1 = LOW and E2 = LOW and MR = LOW; VIH ≥ 3.15 V, VIL ≤ 1.35 V at VCC = 4.5 V.
12 D2 input Data input for flip-flop 2; sampled on the positive-going clock edge when E1 = LOW and E2 = LOW and MR = LOW; VIH ≥ 3.15 V, VIL ≤ 1.35 V at VCC = 4.5 V.
13 D1 input Data input for flip-flop 1; sampled on the positive-going clock edge when E1 = LOW and E2 = LOW and MR = LOW; VIH ≥ 3.15 V, VIL ≤ 1.35 V at VCC = 4.5 V.
14 D0 input Data input for flip-flop 0; sampled on the positive-going clock edge when E1 = LOW and E2 = LOW and MR = LOW; VIH ≥ 3.15 V, VIL ≤ 1.35 V at VCC = 4.5 V.
15 MR input Master reset, active HIGH and asynchronous; forces all Q outputs LOW independent of clock, E1, E2, and D inputs; tpd (MR to output) max 44 ns at VCC = 4.5 V, 85 °C.
16 VCC power_in Positive supply voltage; HC types 2 V to 6 V, HCT types 4.5 V to 5.5 V; absolute maximum 7 V; decouple with 0.1 µF ceramic capacitor placed as close to pin as possible.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-16
Category Logic
Pins 16

CAD (KiCad official)

  • Symbol: CD74HC173PWR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: cd74hc173pwr-etched.step / cd74hc173pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cd74hc173pwr.step / cd74hc173pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 8e3cd2654a5626b0, retrieved 2026-09-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-sonnet-4-6 (text+vision), consensus claude-opus-4-7 (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