component
SN74HC574DWR
Public Made by Adomby adom
Texas Instruments Flip Flops, SOIC-20-300mil. Datasheet-verified pinout, 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
markdownSN74HC574DWR
Texas Instruments · Flip Flops · SOIC-20-300mil
SN74HC574DWR from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ~{OE} | input | Active-low output enable; when high, all eight Q outputs are forced to the high-impedance state regardless of CLK or D inputs. |
| 2 | 1D | input | Data input for flip-flop 1; state is captured on the low-to-high transition of CLK. |
| 3 | 2D | input | Data input for flip-flop 2; state is captured on the low-to-high transition of CLK. |
| 4 | 3D | input | Data input for flip-flop 3; state is captured on the low-to-high transition of CLK. |
| 5 | 4D | input | Data input for flip-flop 4; state is captured on the low-to-high transition of CLK. |
| 6 | 5D | input | Data input for flip-flop 5; state is captured on the low-to-high transition of CLK. |
| 7 | 6D | input | Data input for flip-flop 6; state is captured on the low-to-high transition of CLK. |
| 8 | 7D | input | Data input for flip-flop 7; state is captured on the low-to-high transition of CLK. |
| 9 | 8D | input | Data input for flip-flop 8; state is captured on the low-to-high transition of CLK. |
| 10 | GND | power_in | Ground reference (0 V); continuous current per VCC or GND pin must not exceed ±70 mA. |
| 11 | CLK | input | Clock input; all eight flip-flops capture their D inputs on the low-to-high transition; minimum pulse width 16 ns at VCC = 4.5 V. |
| 12 | 8Q | tri_state | 3-state in-phase output of flip-flop 8; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 13 | 7Q | tri_state | 3-state in-phase output of flip-flop 7; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 14 | 6Q | tri_state | 3-state in-phase output of flip-flop 6; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 15 | 5Q | tri_state | 3-state in-phase output of flip-flop 5; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 16 | 4Q | tri_state | 3-state in-phase output of flip-flop 4; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 17 | 3Q | tri_state | 3-state in-phase output of flip-flop 3; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 18 | 2Q | tri_state | 3-state in-phase output of flip-flop 2; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 19 | 1Q | tri_state | 3-state in-phase output of flip-flop 1; high-impedance when OE is high; IOH = −6 mA / IOL = 6 mA at VCC = 4.5 V. |
| 20 | VCC | power_in | Positive supply voltage; recommended operating range 2 V to 6 V; decouple with 0.1 µF ceramic capacitor placed as close to the pin as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC574DWR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
sn74hc574dwr-etched.step/sn74hc574dwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc574dwr.step/sn74hc574dwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
fbd2028a87b8d5b8, retrieved 2026-09-22, 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 0.2, primaryclaude-sonnet-4-6(text+vision), consensusclaude-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).