component
SN74ABT540DBR
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, SSOP-20-208mil. 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
markdownSN74ABT540DBR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SSOP-20-208mil
SN74ABT540DBR from Texas Instruments, in a SSOP-20-208mil. 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 | OE1 | input | Active-low output enable control input; when high, all outputs are high-impedance; input voltage 0 to VCC. |
| 2 | A1 | input | Data input 1; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 18. |
| 3 | A2 | input | Data input 2; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 17. |
| 4 | A3 | input | Data input 3; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 16. |
| 5 | A4 | input | Data input 4; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 15. |
| 6 | A5 | input | Data input 5; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 14. |
| 7 | A6 | input | Data input 6; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 13. |
| 8 | A7 | input | Data input 7; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 12. |
| 9 | A8 | input | Data input 8; VIH ≥ 2 V, VIL ≤ 0.8 V; inverted buffered output on pin 11. |
| 10 | GND | power_in | Ground power supply return. |
| 11 | Y8 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 12 | Y7 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 13 | Y6 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 14 | Y5 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 15 | Y4 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 16 | Y3 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 17 | Y2 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 18 | Y1 | tri_state | 3-state inverted output; VOH ≥ 2 V (IOH -24 mA), VOL ≤ 0.55 V (IOL 48 mA); high-impedance when OE1 or OE2 high. |
| 19 | OE2 | input | Active-low output enable control input; when high, all outputs are high-impedance; input voltage 0 to VCC. |
| 20 | VCC | power_in | Positive power supply voltage; recommended operating range 4.5-5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-20-208mil |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74ABT540DBR - Footprint:
Package_SO:SSOP-20_5.3x7.2mm_P0.65mm - 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files:
sn74abt540dbr-etched.step/sn74abt540dbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74abt540dbr.step/sn74abt540dbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (18 pp, sha256
13be7ff9fbec7951, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).