component
PI4IOE5V9539LEX
Public Made by Adomby adom
Diodes Incorporated I/O Expanders, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "pi4ioe5v9539lex",
"version": "0.1.0",
"type": "component",
"description": "Diodes Incorporated I/O Expanders, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"communication interface chip-uart-485-232",
"pi4ioe5v9539lex",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
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"pi4ioe5v9539lex-hero.overlay.json",
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],
"component": {
"mpn": "PI4IOE5V9539LEX",
"manufacturer": "Diodes Incorporated",
"package": "TSSOP-24",
"pin_count": 24,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "I/O Expanders",
"datasheet": "https://www.diodes.com/assets/Datasheets/PI4IOE5V9539LEX.pdf",
"parts": {
"symbol": "pi4ioe5v9539lex.kicad_sym",
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"model_3d_step_plain": "pi4ioe5v9539lex.step",
"lbr": "pi4ioe5v9539lex.lbr"
},
"distributor_links": {
"lcsc": "C2669684",
"digikey": "31-PI4IOE5V9539LEXTR-ND",
"mouser": "729-PI4IOE5V9539LEX"
},
"distributor_check": {
"checked_at": "2026-10-30T16:26:56Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "31-PI4IOE5V9539LEXTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "729-PI4IOE5V9539LEX",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "INT",
"type": "output",
"description": "Active-low open-drain interrupt output, activated when a port pin configured as an input changes state."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Address input 1, which together with A0 sets the fixed I2C-bus address (up to four devices on one bus)."
},
{
"number": "3",
"name": "RESET",
"type": "input",
"description": "Active-low reset input; driving it LOW resets the state machine and registers to defaults, with a minimum pulse width of 25 ns."
},
{
"number": "4",
"name": "IO0_0",
"type": "bidirectional",
"description": "Port 0 input/output 0, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "5",
"name": "IO0_1",
"type": "bidirectional",
"description": "Port 0 input/output 1, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "6",
"name": "IO0_2",
"type": "bidirectional",
"description": "Port 0 input/output 2, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "7",
"name": "IO0_3",
"type": "bidirectional",
"description": "Port 0 input/output 3, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "8",
"name": "IO0_4",
"type": "bidirectional",
"description": "Port 0 input/output 4, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "9",
"name": "IO0_5",
"type": "bidirectional",
"description": "Port 0 input/output 5, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "10",
"name": "IO0_6",
"type": "bidirectional",
"description": "Port 0 input/output 6, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "11",
"name": "IO0_7",
"type": "bidirectional",
"description": "Port 0 input/output 7, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "12",
"name": "GND",
"type": "power_in",
"description": "Ground, 0 V reference."
},
{
"number": "13",
"name": "IO1_0",
"type": "bidirectional",
"description": "Port 1 input/output 0, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "14",
"name": "IO1_1",
"type": "bidirectional",
"description": "Port 1 input/output 1, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "15",
"name": "IO1_2",
"type": "bidirectional",
"description": "Port 1 input/output 2, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "16",
"name": "IO1_3",
"type": "bidirectional",
"description": "Port 1 input/output 3, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "17",
"name": "IO1_4",
"type": "bidirectional",
"description": "Port 1 input/output 4, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "18",
"name": "IO1_5",
"type": "bidirectional",
"description": "Port 1 input/output 5, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "19",
"name": "IO1_6",
"type": "bidirectional",
"description": "Port 1 input/output 6, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "20",
"name": "IO1_7",
"type": "bidirectional",
"description": "Port 1 input/output 7, 5V tolerant (up to 5.5 V), configured as input at reset."
},
{
"number": "21",
"name": "A0",
"type": "input",
"description": "Address input 0, which together with A1 sets the fixed I2C-bus address."
},
{
"number": "22",
"name": "SCL",
"type": "input",
"description": "Serial clock line input, 0 to 400 kHz, with noise filter."
},
{
"number": "23",
"name": "SDA",
"type": "bidirectional",
"description": "Serial data line, open-drain, with noise filter on the input."
},
{
"number": "24",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2.3 V to 5.5 V."
}
],
"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: Pin 1 INT is described as 'Interrupt input (open-drain)' in Table 1 but its type is listed as O; tre"
],
"pages_sent": 17,
"cost_usd": 0.1112,
"at": "2026-10-30T16:26:44"
},
"datasheet": {
"url": "https://www.diodes.com/assets/Datasheets/PI4IOE5V9539LEX.pdf",
"pages": 17,
"sha256": "14b4073298db8e2b",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 24,
"described": 24,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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}