component
SN74HC540PWR
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, 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
markdownSN74HC540PWR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
SN74HC540PWR 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 | OE1 | input | Active-low output-enable input; when either OE1 or OE2 is high, all eight Y outputs are forced to the high-impedance state. |
| 2 | A1 | input | Buffer/driver data input 1; a low input produces a high on Y1 (inverted data) when enabled. |
| 3 | A2 | input | Buffer/driver data input 2; a low input produces a high on Y2 (inverted data) when enabled. |
| 4 | A3 | input | Buffer/driver data input 3; a low input produces a high on Y3 (inverted data) when enabled. |
| 5 | A4 | input | Buffer/driver data input 4; a low input produces a high on Y4 (inverted data) when enabled. |
| 6 | A5 | input | Buffer/driver data input 5; a low input produces a high on Y5 (inverted data) when enabled. |
| 7 | A6 | input | Buffer/driver data input 6; a low input produces a high on Y6 (inverted data) when enabled. |
| 8 | A7 | input | Buffer/driver data input 7; a low input produces a high on Y7 (inverted data) when enabled. |
| 9 | A8 | input | Buffer/driver data input 8; a low input produces a high on Y8 (inverted data) when enabled. |
| 10 | GND | power_in | Ground reference for the device; must be connected to 0 V. |
| 11 | Y8 | tri_state | 3-state inverted data output corresponding to A8; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 12 | Y7 | tri_state | 3-state inverted data output corresponding to A7; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 13 | Y6 | tri_state | 3-state inverted data output corresponding to A6; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 14 | Y5 | tri_state | 3-state inverted data output corresponding to A5; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 15 | Y4 | tri_state | 3-state inverted data output corresponding to A4; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 16 | Y3 | tri_state | 3-state inverted data output corresponding to A3; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 17 | Y2 | tri_state | 3-state inverted data output corresponding to A2; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 18 | Y1 | tri_state | 3-state inverted data output corresponding to A1; ±6-mA drive at 5 V, high-impedance when OE1 or OE2 is high. |
| 19 | OE2 | input | Active-low output-enable input; when either OE1 or OE2 is high, all eight Y outputs are forced to the high-impedance state. |
| 20 | VCC | power_in | Positive supply voltage input, recommended operating range 2 V to 6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC540PWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74hc540pwr-etched.step/sn74hc540pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc540pwr.step/sn74hc540pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (25 pp, sha256
ae0e4a4e25a26926, retrieved 2026-09-24, 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).