component
SN74HC540PW
Public Made by Adomby adom
Texas Instruments Inverters, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "sn74hc540pw",
"title": "SN74HC540PW",
"brief": "Texas Instruments Inverters, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
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"logic",
"sn74hc540pw",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "SN74HC540PW",
"manufacturer": "Texas Instruments",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Logic",
"subcategory": "Inverters",
"datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc540.pdf",
"parts": {
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"footprint": "sn74hc540pw.kicad_mod",
"model_3d": "sn74hc540pw-hero.glb",
"model_3d_plain": "sn74hc540pw.glb",
"model_3d_step": "sn74hc540pw-etched.step",
"model_3d_step_plain": "sn74hc540pw.step",
"lbr": "sn74hc540pw.lbr"
},
"distributor_links": {
"lcsc": "C2870650",
"digikey": "296-33940-5-ND",
"mouser": "595-SN74HC540PW"
},
"distributor_check": {
"checked_at": "2026-10-10T23:36:34Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-33940-5-ND",
"status": "found",
"lifecycle": "Obsolete"
},
"mouser": {
"pn": "595-SN74HC540PW",
"status": "found",
"lifecycle": "End of Life"
}
},
"pins": [
{
"number": "1",
"name": "OE1",
"type": "input",
"description": "Active-low output-enable 1; if either OE1 or OE2 is high, all eight outputs are in the high-impedance state."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Data input 1, inverted at output Y1; unused inputs must be held at VCC or GND."
},
{
"number": "3",
"name": "A2",
"type": "input",
"description": "Data input 2, inverted at output Y2; unused inputs must be held at VCC or GND."
},
{
"number": "4",
"name": "A3",
"type": "input",
"description": "Data input 3, inverted at output Y3; unused inputs must be held at VCC or GND."
},
{
"number": "5",
"name": "A4",
"type": "input",
"description": "Data input 4, inverted at output Y4; unused inputs must be held at VCC or GND."
},
{
"number": "6",
"name": "A5",
"type": "input",
"description": "Data input 5, inverted at output Y5; unused inputs must be held at VCC or GND."
},
{
"number": "7",
"name": "A6",
"type": "input",
"description": "Data input 6, inverted at output Y6; unused inputs must be held at VCC or GND."
},
{
"number": "8",
"name": "A7",
"type": "input",
"description": "Data input 7, inverted at output Y7; unused inputs must be held at VCC or GND."
},
{
"number": "9",
"name": "A8",
"type": "input",
"description": "Data input 8, inverted at output Y8; unused inputs must be held at VCC or GND."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "11",
"name": "Y8",
"type": "tri_state",
"description": "3-state inverted output for A8 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "12",
"name": "Y7",
"type": "tri_state",
"description": "3-state inverted output for A7 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "13",
"name": "Y6",
"type": "tri_state",
"description": "3-state inverted output for A6 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "14",
"name": "Y5",
"type": "tri_state",
"description": "3-state inverted output for A5 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "15",
"name": "Y4",
"type": "tri_state",
"description": "3-state inverted output for A4 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "16",
"name": "Y3",
"type": "tri_state",
"description": "3-state inverted output for A3 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "17",
"name": "Y2",
"type": "tri_state",
"description": "3-state inverted output for A2 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "18",
"name": "Y1",
"type": "tri_state",
"description": "3-state inverted output for A1 with ±6-mA drive at 5 V; high-impedance when OE1 or OE2 is high."
},
{
"number": "19",
"name": "OE2",
"type": "input",
"description": "Active-low output-enable 2; if either OE1 or OE2 is high, all eight outputs are in the high-impedance state."
},
{
"number": "20",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2 V to 6 V recommended, with a 0.1-μF bypass capacitor placed close to the pin."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The addendum lists SN74HC540PW as Obsolete; SN74HC540PWR and PWT are the variants listed as Active o",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 25,
"cost_usd": 0.4057,
"at": "2026-10-10T23:36:16"
},
"datasheet": {
"url": "https://www.ti.com/lit/ds/symlink/sn74hc540.pdf",
"pages": 25,
"sha256": "ae0e4a4e25a26926",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"file": "sn74hc540pw.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
"checked": "2026-10-10",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "sn74hc540pw-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "ec6ae1714a9573120a287a71d6746d4e8c9fbc4717e00ac557dc808803362e26",
"checked": "2026-10-10",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "TSSOP-20",
"Category": "Logic",
"Pins": "20"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"sn74hc540pw"
],
"discovery_pitch": "SN74HC540PW (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
},
"files": [
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"sn74hc540pw.kicad_mod",
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"sn74hc540pw.step",
"sn74hc540pw.lbr",
"docs/hero.png",
"docs/sn74hc540pw-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"sn74hc540pw-hero.glb",
"sn74hc540pw-hero.overlay.json"
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"visibility": {
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}
}