component
SN74HC574PWR
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
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownSN74HC574PWR
Texas Instruments · Flip Flops · TSSOP-20
SN74HC574PWR from Texas Instruments, in a TSSOP-20. 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 input; when high, forces all eight Q outputs to the high-impedance state without affecting internal flip-flop data. |
| 2 | 1D | input | Data input for flip-flop 1, latched into Q1 on the low-to-high transition of CLK. |
| 3 | 2D | input | Data input for flip-flop 2, latched into Q2 on the low-to-high transition of CLK. |
| 4 | 3D | input | Data input for flip-flop 3, latched into Q3 on the low-to-high transition of CLK. |
| 5 | 4D | input | Data input for flip-flop 4, latched into Q4 on the low-to-high transition of CLK. |
| 6 | 5D | input | Data input for flip-flop 5, latched into Q5 on the low-to-high transition of CLK. |
| 7 | 6D | input | Data input for flip-flop 6, latched into Q6 on the low-to-high transition of CLK. |
| 8 | 7D | input | Data input for flip-flop 7, latched into Q7 on the low-to-high transition of CLK. |
| 9 | 8D | input | Data input for flip-flop 8, latched into Q8 on the low-to-high transition of CLK. |
| 10 | GND | power_in | Ground reference (0 V) supply pin. |
| 11 | CLK | input | Clock input; data on Dn inputs is entered into the corresponding flip-flop on the low-to-high (rising) transition of this input. |
| 12 | 8Q | tri_state | 3-state noninverting output of flip-flop 8, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 13 | 7Q | tri_state | 3-state noninverting output of flip-flop 7, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 14 | 6Q | tri_state | 3-state noninverting output of flip-flop 6, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 15 | 5Q | tri_state | 3-state noninverting output of flip-flop 5, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 16 | 4Q | tri_state | 3-state noninverting output of flip-flop 4, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 17 | 3Q | tri_state | 3-state noninverting output of flip-flop 3, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 18 | 2Q | tri_state | 3-state noninverting output of flip-flop 2, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 19 | 1Q | tri_state | 3-state noninverting output of flip-flop 1, capable of ±6-mA drive at 5 V and driven to high impedance when OE is high. |
| 20 | VCC | power_in | Positive supply voltage pin, specified over a wide operating range of 2 V to 6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC574PWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74hc574pwr-etched.step/sn74hc574pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc574pwr.step/sn74hc574pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
41dc3007ca8c8f8e, retrieved 2026-09-23, tier: manufacturer) - 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).