component
MCP23S18T-E
Public Made by Adomby adom
Microchip Tech I/O Expanders, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "mcp23s18t-e",
"title": "MCP23S18T-E",
"brief": "Microchip Tech I/O Expanders, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"communication interface chip-uart-485-232",
"mcp23s18t-e",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "MCP23S18T-E",
"manufacturer": "Microchip Tech",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "I/O Expanders",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/25798ad5d8f74a5ab0390b5f200b7718.pdf",
"parts": {
"symbol": "mcp23s18t-e.kicad_sym",
"footprint": "mcp23s18t-e.kicad_mod",
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"model_3d_plain": "mcp23s18t-e-etched.glb",
"model_3d_step": "mcp23s18t-e-etched.step",
"model_3d_step_plain": "mcp23s18t-e.step",
"lbr": "mcp23s18t-e.lbr"
},
"distributor_links": {
"lcsc": "C629443"
},
"distributor_check": {
"checked_at": "2026-10-27T01:28:53Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "VSS",
"type": "power_in",
"description": "Ground (high current capable)."
},
{
"number": "2",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "3",
"name": "GPB0",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "4",
"name": "GPB1",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "5",
"name": "GPB2",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "6",
"name": "GPB3",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "7",
"name": "GPB4",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "8",
"name": "GPB5",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "9",
"name": "GPB6",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "10",
"name": "GPB7",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "11",
"name": "VDD",
"type": "power_in",
"description": "Power supply (high current capable), 1.8 V to 5.5 V operating voltage."
},
{
"number": "12",
"name": "CS",
"type": "input",
"description": "SPI chip select input."
},
{
"number": "13",
"name": "SCK",
"type": "input",
"description": "SPI serial clock input, up to 10 MHz."
},
{
"number": "14",
"name": "SI",
"type": "input",
"description": "SPI serial data input."
},
{
"number": "15",
"name": "SO",
"type": "output",
"description": "SPI serial data output."
},
{
"number": "16",
"name": "RESET",
"type": "input",
"description": "Hardware reset input that must be externally biased."
},
{
"number": "17",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "18",
"name": "INTB",
"type": "output",
"description": "Interrupt output for port B, configurable as active high, active low, or open drain."
},
{
"number": "19",
"name": "INTA",
"type": "output",
"description": "Interrupt output for port A, configurable as active high, active low, or open drain."
},
{
"number": "20",
"name": "GPA0",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "21",
"name": "GPA1",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "22",
"name": "GPA2",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "23",
"name": "GPA3",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "24",
"name": "GPA4",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "25",
"name": "GPA5",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "26",
"name": "GPA6",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "27",
"name": "GPA7",
"type": "bidirectional",
"description": "Bidirectional I/O pin with 5.5 V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
},
{
"number": "28",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
}
],
"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",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet excerpt does not include the ordering information page or the SOIC package drawing. Th"
],
"pages_sent": 9,
"cost_usd": 0.1166,
"at": "2026-10-27T01:28:22"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/25798ad5d8f74a5ab0390b5f200b7718.pdf",
"pages": 56,
"sha256": "4d2e8ba17e366e46",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
"models_3d": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
10.3,
17.9,
2.75
],
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"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "b889a13dbe9ec59e79fa9f1b5118b00bfa54f9582392335ff3365b64afc264b1",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "mcp23s18t-e-etched.step",
"role": "eda",
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"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "8947785c20378f86f3b89ae317d5b2004d13d8b84a9f2d6f6492e566ad05afd7",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "SOIC-28-300mil",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "28"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"mcp23s18t-e"
],
"discovery_pitch": "MCP23S18T-E (Microchip Tech) 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"
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"files": [
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"viewers/symbol.html",
"viewers/footprint.html",
"mcp23s18t-e-hero.glb",
"mcp23s18t-e-hero.overlay.json",
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"visibility": {
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}
}