component
CD74HCT574QPWRG4Q1
Public Made by Adomby adom
Texas Instruments Flip Flops, TSSOP-20. 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
markdownCD74HCT574QPWRG4Q1
Texas Instruments · Flip Flops · TSSOP-20
CD74HCT574QPWRG4Q1 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 | OE | input | Output enable control; outputs in high-impedance state when high, active when low |
| 2 | D0 | input | Data input D0; captured on low-to-high clock transition |
| 3 | D1 | input | Data input D1; captured on low-to-high clock transition |
| 4 | D2 | input | Data input D2; captured on low-to-high clock transition |
| 5 | D3 | input | Data input D3; captured on low-to-high clock transition |
| 6 | D4 | input | Data input D4; captured on low-to-high clock transition |
| 7 | D5 | input | Data input D5; captured on low-to-high clock transition |
| 8 | D6 | input | Data input D6; captured on low-to-high clock transition |
| 9 | D7 | input | Data input D7; captured on low-to-high clock transition |
| 10 | GND | power_in | Ground reference (0V) |
| 11 | CP | input | Clock pulse input; edge-triggered on low-to-high transition |
| 12 | Q7 | tri_state | Data output Q7; 3-state output, high impedance when OE is high |
| 13 | Q6 | tri_state | Data output Q6; 3-state output, high impedance when OE is high |
| 14 | Q5 | tri_state | Data output Q5; 3-state output, high impedance when OE is high |
| 15 | Q4 | tri_state | Data output Q4; 3-state output, high impedance when OE is high |
| 16 | Q3 | tri_state | Data output Q3; 3-state output, high impedance when OE is high |
| 17 | Q2 | tri_state | Data output Q2; 3-state output, high impedance when OE is high |
| 18 | Q1 | tri_state | Data output Q1; 3-state output, high impedance when OE is high |
| 19 | Q0 | tri_state | Data output Q0; 3-state output, high impedance when OE is high |
| 20 | VCC | power_in | Power supply voltage; 4.5V to 5.5V operating range |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
CD74HCT574QPWRG4Q1 - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
cd74hct574qpwrg4q1-etched.step/cd74hct574qpwrg4q1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hct574qpwrg4q1.step/cd74hct574qpwrg4q1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (17 pp, sha256
724bb46750578974, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).