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CY74FCT821CTSOCT

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Texas Instruments Flip Flops, SOIC-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CY74FCT821CTSOCT

Texas Instruments · Flip Flops · SOIC-24-300mil

CY74FCT821CTSOCT from Texas Instruments, in a SOIC-24-300mil. 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 OE input Output control: when OE is high the Y outputs are in the high-impedance state, and when OE is low the true register data is present at the Y outputs.
2 D0 input D flip-flop data input for bit 0.
3 D1 input D flip-flop data input for bit 1.
4 D2 input D flip-flop data input for bit 2.
5 D3 input D flip-flop data input for bit 3.
6 D4 input D flip-flop data input for bit 4.
7 D5 input D flip-flop data input for bit 5.
8 D6 input D flip-flop data input for bit 6.
9 D7 input D flip-flop data input for bit 7.
10 D8 input D flip-flop data input for bit 8.
11 D9 input D flip-flop data input for bit 9.
12 GND power_in Device ground; all absolute maximum voltage ratings are referenced to ground (-0.5 V to 7 V for supply, input and output voltages).
13 CP input Clock pulse for the register; data is entered into the register on the low-to-high clock transition.
14 Y9 tri_state Register 3-state output for bit 9.
15 Y8 tri_state Register 3-state output for bit 8.
16 Y7 tri_state Register 3-state output for bit 7.
17 Y6 tri_state Register 3-state output for bit 6.
18 Y5 tri_state Register 3-state output for bit 5.
19 Y4 tri_state Register 3-state output for bit 4.
20 Y3 tri_state Register 3-state output for bit 3.
21 Y2 tri_state Register 3-state output for bit 2.
22 Y1 tri_state Register 3-state output for bit 1.
23 Y0 tri_state Register 3-state output for bit 0.
24 VCC power_in Supply voltage, recommended operating range 4.75 V to 5.25 V (nominal 5 V).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-24-300mil
Category Logic
Pins 24

CAD (KiCad official)

  • Symbol: CY74FCT821CTSOCT
  • Footprint: Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm
  • 3D model: SOIC-24-300mil (KiCad packages3D, STEP)
  • 3D model files: cy74fct821ctsoct-etched.step / cy74fct821ctsoct-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cy74fct821ctsoct.step / cy74fct821ctsoct.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (14 pp, sha256 5826866e972c5a41, retrieved 2026-10-10, 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