component
PCA9539DW
Public Made by Adomby adom
Texas Instruments I/O Expanders, SOIC-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "pca9539dw",
"title": "PCA9539DW",
"brief": "Texas Instruments I/O Expanders, SOIC-24-300mil. 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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"interface",
"pca9539dw",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "PCA9539DW",
"manufacturer": "Texas Instruments",
"package": "SOIC-24-300mil",
"pin_count": 24,
"category": "Interface",
"subcategory": "I/O Expanders",
"datasheet": "https://www.ti.com/cn/lit/gpn/pca9539",
"parts": {
"symbol": "pca9539dw.kicad_sym",
"footprint": "pca9539dw.kicad_mod",
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"model_3d_step": "pca9539dw-etched.step",
"model_3d_step_plain": "pca9539dw.step",
"lbr": "pca9539dw.lbr"
},
"distributor_links": {
"lcsc": 1542521,
"digikey": "296-33499-5-ND",
"mouser": "595-PCA9539DW"
},
"distributor_check": {
"checked_at": "2026-10-03T08:07:49Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-33499-5-ND",
"status": "found",
"lifecycle": "Active"
},
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"pn": "595-PCA9539DW",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "INT",
"type": "output",
"description": "Open-drain active-low interrupt output that must be connected to VCC through a pullup resistor."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Address input that must be connected directly to VCC or ground."
},
{
"number": "3",
"name": "RESET",
"type": "input",
"description": "Active-low reset input; connect to VCC through a pullup resistor if no active connection is used, and keep its voltage at or below VCC."
},
{
"number": "4",
"name": "P00",
"type": "bidirectional",
"description": "Port 0 bit 0 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "5",
"name": "P01",
"type": "bidirectional",
"description": "Port 0 bit 1 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "6",
"name": "P02",
"type": "bidirectional",
"description": "Port 0 bit 2 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "7",
"name": "P03",
"type": "bidirectional",
"description": "Port 0 bit 3 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "8",
"name": "P04",
"type": "bidirectional",
"description": "Port 0 bit 4 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "9",
"name": "P05",
"type": "bidirectional",
"description": "Port 0 bit 5 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "10",
"name": "P06",
"type": "bidirectional",
"description": "Port 0 bit 6 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "11",
"name": "P07",
"type": "bidirectional",
"description": "Port 0 bit 7 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "12",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "13",
"name": "P10",
"type": "bidirectional",
"description": "Port 1 bit 0 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "14",
"name": "P11",
"type": "bidirectional",
"description": "Port 1 bit 1 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "15",
"name": "P12",
"type": "bidirectional",
"description": "Port 1 bit 2 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "16",
"name": "P13",
"type": "bidirectional",
"description": "Port 1 bit 3 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "17",
"name": "P14",
"type": "bidirectional",
"description": "Port 1 bit 4 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "18",
"name": "P15",
"type": "bidirectional",
"description": "Port 1 bit 5 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "19",
"name": "P16",
"type": "bidirectional",
"description": "Port 1 bit 6 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "20",
"name": "P17",
"type": "bidirectional",
"description": "Port 1 bit 7 input/output with push-pull design structure; inputs tolerate up to 5.5 V."
},
{
"number": "21",
"name": "A0",
"type": "input",
"description": "Address input that must be connected directly to VCC or ground."
},
{
"number": "22",
"name": "SCL",
"type": "input",
"description": "I2C serial clock bus input that must be connected to VCC through a pullup resistor."
},
{
"number": "23",
"name": "SDA",
"type": "bidirectional",
"description": "I2C serial data bus that must be connected to VCC through a pullup resistor."
},
{
"number": "24",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2.3 V to 5.5 V operating range."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-4-5-20251001",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: SCL and SDA are I2C open-drain bus signals. Classified as 'bidirectional' to reflect their role in b; INT is an open-drain interrupt output (page 17). Classified as 'tri_state' to reflect the open-drain"
],
"pages_sent": 12,
"cost_usd": 0.1798,
"at": "2026-10-03T08:07:17"
},
"datasheet": {
"url": "https://www.ti.com/cn/lit/gpn/pca9539",
"pages": 48,
"sha256": "efe5c16c360b8432",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 24,
"described": 24,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
}
},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "SOIC-24-300mil",
"Category": "Interface",
"Pins": "24"
}
},
"variants": [],
"sections": [
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"discovery_triggers": [
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],
"discovery_pitch": "PCA9539DW (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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