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SN74HC574N
Public Made by Adomby adom
Texas Instruments Flip Flops, DIP-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
markdownSN74HC574N
Texas Instruments · Flip Flops · DIP-20
SN74HC574N from Texas Instruments, in a DIP-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 | Active-low buffered output-enable input; when low the eight Q outputs reflect the stored data, when high the outputs are forced to the high-impedance state without affecting internal flip-flop operation. |
| 2 | 1D | input | Data input to flip-flop 1, latched into the flip-flop on the low-to-high transition of CLK. |
| 3 | 2D | input | Data input to flip-flop 2, latched into the flip-flop on the low-to-high transition of CLK. |
| 4 | 3D | input | Data input to flip-flop 3, latched into the flip-flop on the low-to-high transition of CLK. |
| 5 | 4D | input | Data input to flip-flop 4, latched into the flip-flop on the low-to-high transition of CLK. |
| 6 | 5D | input | Data input to flip-flop 5, latched into the flip-flop on the low-to-high transition of CLK. |
| 7 | 6D | input | Data input to flip-flop 6, latched into the flip-flop on the low-to-high transition of CLK. |
| 8 | 7D | input | Data input to flip-flop 7, latched into the flip-flop on the low-to-high transition of CLK. |
| 9 | 8D | input | Data input to flip-flop 8, latched into the flip-flop on the low-to-high transition of CLK. |
| 10 | GND | power_in | Ground (0 V) supply reference for the device. |
| 11 | CLK | input | Clock input common to all eight flip-flops; data on the D inputs is entered on the low-to-high (rising-edge) transition of this pin. |
| 12 | 8Q | tri_state | Three-state output of flip-flop 8, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 13 | 7Q | tri_state | Three-state output of flip-flop 7, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 14 | 6Q | tri_state | Three-state output of flip-flop 6, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 15 | 5Q | tri_state | Three-state output of flip-flop 5, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 16 | 4Q | tri_state | Three-state output of flip-flop 4, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 17 | 3Q | tri_state | Three-state output of flip-flop 3, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 18 | 2Q | tri_state | Three-state output of flip-flop 2, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 19 | 1Q | tri_state | Three-state output of flip-flop 1, capable of ±6 mA drive at VCC = 5 V and high-impedance when OE is high. |
| 20 | VCC | power_in | Positive supply voltage input, recommended operating range 2 V to 6 V (absolute maximum -0.5 V to 7 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | DIP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC574N - Footprint:
Package_DIP:DIP-20_W7.62mm - 3D model: DIP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74hc574n-etched.step/sn74hc574n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc574n.step/sn74hc574n.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 2026-09-24, 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-5(text+vision), consensusclaude-opus-4-8(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).