component
PCA9538PW
Public Made by Adomby adom
NXP Semicon I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "pca9538pw",
"version": "0.1.0",
"type": "component",
"description": "NXP Semicon I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"interface ics",
"pca9538pw",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"pca9538pw.kicad_sym",
"pca9538pw.kicad_mod",
"pca9538pw.glb",
"pca9538pw.step",
"pca9538pw.lbr",
"docs/hero.png",
"docs/pca9538pw-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"pca9538pw-hero.glb",
"pca9538pw-hero.overlay.json",
"pca9538pw-etched.glb"
],
"component": {
"mpn": "PCA9538PW",
"manufacturer": "NXP Semicon",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Interface ICs",
"subcategory": "I/O Expanders",
"datasheet": "https://www.nxp.com/docs/en/data-sheet/PCA9538PW.pdf",
"parts": {
"symbol": "pca9538pw.kicad_sym",
"footprint": "pca9538pw.kicad_mod",
"model_3d": "pca9538pw-hero.glb",
"model_3d_plain": "pca9538pw-etched.glb",
"model_3d_step": "pca9538pw-etched.step",
"model_3d_step_plain": "pca9538pw.step",
"lbr": "pca9538pw.lbr"
},
"distributor_links": {
"lcsc": "C2669741",
"mouser": "771-PCA9538PW"
},
"distributor_check": {
"checked_at": "2026-11-02T16:59:39Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": "771-PCA9538PW",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "A0",
"type": "input",
"description": "Address input 0 sets one of the fixed hardware-selectable bits of the I2C-bus target address (1 1 1 0 0 A1 A0)."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Address input 1 sets one of the fixed hardware-selectable bits of the I2C-bus target address (1 1 1 0 0 A1 A0)."
},
{
"number": "3",
"name": "RESET",
"type": "input",
"description": "Active LOW reset input that holds the registers and I2C-bus state machine in their default state while held LOW for at least tw(rst), and requires a pullup resistor to VDD if unused."
},
{
"number": "4",
"name": "IO0",
"type": "bidirectional",
"description": "Input/output 0 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "5",
"name": "IO1",
"type": "bidirectional",
"description": "Input/output 1 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "6",
"name": "IO2",
"type": "bidirectional",
"description": "Input/output 2 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "7",
"name": "IO3",
"type": "bidirectional",
"description": "Input/output 3 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "8",
"name": "VSS",
"type": "power_in",
"description": "Supply ground; it must be connected to the supply ground for proper device operation."
},
{
"number": "9",
"name": "IO4",
"type": "bidirectional",
"description": "Input/output 4 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "10",
"name": "IO5",
"type": "bidirectional",
"description": "Input/output 5 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "11",
"name": "IO6",
"type": "bidirectional",
"description": "Input/output 6 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "12",
"name": "IO7",
"type": "bidirectional",
"description": "Input/output 7 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
},
{
"number": "13",
"name": "INT",
"type": "output",
"description": "Open-drain active LOW interrupt output that is activated when any input state differs from its Input Port register state."
},
{
"number": "14",
"name": "SCL",
"type": "input",
"description": "Serial clock line for the I2C-bus/SMBus interface, supporting 0 Hz to 400 kHz clock frequency with a noise filter on its input."
},
{
"number": "15",
"name": "SDA",
"type": "bidirectional",
"description": "Serial data line for the I2C-bus/SMBus interface, with a noise filter on its input."
},
{
"number": "16",
"name": "VDD",
"type": "power_in",
"description": "Supply voltage with an operating range of 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9538PW/Q900)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [],
"pages_sent": 14,
"cost_usd": 0.0178,
"at": "2026-11-02T16:59:25"
},
"datasheet": {
"url": "https://www.nxp.com/docs/en/data-sheet/PCA9538PW.pdf",
"pages": 37,
"sha256": "fcc5a3c0acdca85d",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 16,
"described": 16,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "pca9538pw.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
5.0,
1.1
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "pca9538pw-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
5.0,
1.1
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "4f37dd7fd1af6fe29c5dc0134a1a633888d044eab80b8fa958819f479cb57d5a",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}