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CD74HC688PWR

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Texas Instruments Digital Comparators, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CD74HC688PWR

Texas Instruments · Digital Comparators · TSSOP-20

CD74HC688PWR from Texas Instruments, in a TSSOP-20. 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 E input Active-low enable input; when high, Y is forced high regardless of A and B, and when low Y is low if A = B.
2 A0 input Word A data input bit 0, compared against B0.
3 B0 input Word B data input bit 0, compared against A0.
4 A1 input Word A data input bit 1, compared against B1.
5 B1 input Word B data input bit 1, compared against A1.
6 A2 input Word A data input bit 2, compared against B2.
7 B2 input Word B data input bit 2, compared against A2.
8 A3 input Word A data input bit 3, compared against B3.
9 B3 input Word B data input bit 3, compared against A3.
10 GND power_in Ground supply pin.
11 A4 input Word A data input bit 4, compared against B4.
12 B4 input Word B data input bit 4, compared against A4.
13 A5 input Word A data input bit 5, compared against B5.
14 B5 input Word B data input bit 5, compared against A5.
15 A6 input Word A data input bit 6, compared against B6.
16 B6 input Word B data input bit 6, compared against A6.
17 A7 input Word A data input bit 7, compared against B7.
18 B7 input Word B data input bit 7, compared against A7.
19 Y output Comparator output; low when A = B with E low, high otherwise, and usable as the enable input of a cascaded device.
20 VCC power_in Positive supply pin; 2 V to 6 V for HC types, with a 0.1-µF bypass capacitor recommended.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: CD74HC688PWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: cd74hc688pwr-etched.step / cd74hc688pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cd74hc688pwr.step / cd74hc688pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 054eb5c519094630, retrieved 2026-10-12, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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