component
CD74HC574M
Public Made by Adomby adom
Texas Instruments Flip Flops, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCD74HC574M
Texas Instruments · Flip Flops · SOIC-20-300mil
CD74HC574M from Texas Instruments, in a SOIC-20-300mil. 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 | Active-low output enable; when HIGH the Q outputs are in the high-impedance state, independent of register operation. |
| 2 | D0 | input | Data input 0, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 3 | D1 | input | Data input 1, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 4 | D2 | input | Data input 2, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 5 | D3 | input | Data input 3, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 6 | D4 | input | Data input 4, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 7 | D5 | input | Data input 5, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 8 | D6 | input | Data input 6, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 9 | D7 | input | Data input 7, latched into the flip-flop on the LOW-to-HIGH transition of CP. |
| 10 | GND | power_in | Ground reference pin. |
| 11 | CP | input | Clock input; data is entered into the registers on the LOW-to-HIGH transition. |
| 12 | Q7 | tri_state | 3-state output 7 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 13 | Q6 | tri_state | 3-state output 6 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 14 | Q5 | tri_state | 3-state output 5 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 15 | Q4 | tri_state | 3-state output 4 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 16 | Q3 | tri_state | 3-state output 3 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 17 | Q2 | tri_state | 3-state output 2 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 18 | Q1 | tri_state | 3-state output 1 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 19 | Q0 | tri_state | 3-state output 0 of the flip-flop, high-impedance when OE is HIGH, able to drive 15 LSTTL loads. |
| 20 | VCC | power_in | Supply voltage, 2 V to 6 V for HC types, with a 0.1-uF bypass capacitor recommended close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
CD74HC574M - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
cd74hc574m-etched.step/cd74hc574m-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hc574m.step/cd74hc574m.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (27 pp, sha256
9958d4197189930d, retrieved 2026-10-08, 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 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).