component
PI4IOE5V9555ZDEX
Public Made by Adomby adom
Diodes Incorporated I/O Expanders, TQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "PI4IOE5V9555ZDEX",
"brief": "Diodes Incorporated I/O Expanders, TQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"communication interface chip-uart-485-232",
"pi4ioe5v9555zdex",
"factory-2.0.0",
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"component": {
"mpn": "PI4IOE5V9555ZDEX",
"manufacturer": "Diodes Incorporated",
"package": "TQFN-24-EP(4x4)",
"pin_count": 25,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "I/O Expanders",
"datasheet": "https://www.diodes.com/assets/Datasheets/PI4IOE5V9555ZDEX.pdf",
"parts": {
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"distributor_links": {
"lcsc": "C2669695",
"digikey": "31-PI4IOE5V9555ZDEXTR-ND",
"mouser": "729-PI4IOE5V9555ZDEX"
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"pn": "31-PI4IOE5V9555ZDEXTR-ND",
"status": "found",
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"pn": "729-PI4IOE5V9555ZDEX",
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},
"pins": [
{
"number": "1",
"name": "IO0_0",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 0, configured as input or output via Configuration Port 0 (C0.0); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "2",
"name": "IO0_1",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 1, configured as input or output via Configuration Port 0 (C0.1); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "3",
"name": "IO0_2",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 2, configured as input or output via Configuration Port 0 (C0.2); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "4",
"name": "IO0_3",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 3, configured as input or output via Configuration Port 0 (C0.3); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "5",
"name": "IO0_4",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 4, configured as input or output via Configuration Port 0 (C0.4); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "6",
"name": "IO0_5",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 5, configured as input or output via Configuration Port 0 (C0.5); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "7",
"name": "IO0_6",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 6, configured as input or output via Configuration Port 0 (C0.6); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "8",
"name": "IO0_7",
"type": "bidirectional",
"description": "Port 0 general-purpose I/O bit 7, configured as input or output via Configuration Port 0 (C0.7); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "9",
"name": "GND",
"type": "power_in",
"description": "Ground reference; all device voltages are specified with respect to GND = 0V."
},
{
"number": "10",
"name": "IO1_0",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 0, configured as input or output via Configuration Port 1 (C1.0); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "11",
"name": "IO1_1",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 1, configured as input or output via Configuration Port 1 (C1.1); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "12",
"name": "IO1_2",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 2, configured as input or output via Configuration Port 1 (C1.2); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "13",
"name": "IO1_3",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 3, configured as input or output via Configuration Port 1 (C1.3); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "14",
"name": "IO1_4",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 4, configured as input or output via Configuration Port 1 (C1.4); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "15",
"name": "IO1_5",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 5, configured as input or output via Configuration Port 1 (C1.5); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "16",
"name": "IO1_6",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 6, configured as input or output via Configuration Port 1 (C1.6); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "17",
"name": "IO1_7",
"type": "bidirectional",
"description": "Port 1 general-purpose I/O bit 7, configured as input or output via Configuration Port 1 (C1.7); inputs may be driven up to 5.5V and each I/O must be externally limited to 25mA."
},
{
"number": "18",
"name": "A0",
"type": "input",
"description": "I2C device address select input bit 0 that selects one of eight preset addresses; VIL max 0.81V and VIH min 1.8V, tolerant up to 5.5V."
},
{
"number": "19",
"name": "SCL",
"type": "input",
"description": "I2C serial clock input, 0 to 400 kHz in Fast Mode; VIH min 0.7VCC and VIL max 0.3VCC."
},
{
"number": "20",
"name": "SDA",
"type": "bidirectional",
"description": "I2C serial data line, open-drain; VIH min 0.7VCC, VIL max 0.3VCC, and IOL min 3mA at VOL = 0.4V."
},
{
"number": "21",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2.3V to 5.5V; the device resets when VCC is lowered to 0.2V for at least 20µs."
},
{
"number": "22",
"name": "INT",
"type": "output",
"description": "Active-LOW open-drain interrupt output, asserted when an input-configured port pin changes state; IOL min 3mA at VOL = 0.4V."
},
{
"number": "23",
"name": "A1",
"type": "input",
"description": "I2C device address select input bit 1 that selects one of eight preset addresses; VIL max 0.81V and VIH min 1.8V, tolerant up to 5.5V."
},
{
"number": "24",
"name": "A2",
"type": "input",
"description": "I2C device address select input bit 2 that selects one of eight preset addresses; VIL max 0.81V and VIH min 1.8V, tolerant up to 5.5V."
},
{
"number": "25",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"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": [
"extractor flagged: The requested package is TQFN-24-EP(4x4), but the datasheet describes the TQFN 4x4-24 package (ZD) w; Pin types were taken as KiCad classes. The datasheet prints IO0_x/IO1_x and SDA as type 'I' or 'Open; INT is printed as type 'O' (output) in the table but its description says 'Interrupt Input (Open-Dra",
"exposed pad 25 added from the footprint"
],
"pages_sent": 15,
"cost_usd": 0.0736,
"at": "2026-10-29T02:27:35"
},
"datasheet": {
"url": "https://www.diodes.com/assets/Datasheets/PI4IOE5V9555ZDEX.pdf",
"pages": 15,
"sha256": "02db35904a0052ce",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 25,
"described": 25,
"cites_pages": true,
"refuses_to_fabricate": true
}
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"seat": "z = 0",
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"zmin_mm": 0,
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"footprint_binding": "identity",
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"checked": "2026-10-29",
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{
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"sha256": "9c31d6e768cfc68643d6d764125749aefc3c063802701e4b4930085cf8c25983",
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},
"metadata": {
"specs": {
"Manufacturer": "Diodes Incorporated",
"Package": "TQFN-24-EP(4x4)",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "25"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "02db35904a0052ce60529845deb2224d27604a21f88e9a132fdcf08bce9e2e87",
"rows": [
{
"name": "Power Supply (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Voltage on an I/O pin (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "Printed as GND-0.5V to +6.0V; min not numeric",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input Current (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "Printed as ±20mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Output Current on an I/O pin (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": -50,
"typ": null,
"max": 50,
"conditions": "Printed as ±50mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply Current (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 160,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Ground Supply Current (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 3,
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{
"name": "Total Power Dissipation (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Operation Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Printed as -40°C ~ 85°C",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "Printed as -65°C ~ 150°C",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Maximum Junction Temperature",
"symbol": "Tj(max)",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply Voltage",
"symbol": "VCC",
"kind": "electrical",
"unit": "V",
"min": 2.3,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply Current",
"symbol": "ICC",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 135,
"max": 200,
"conditions": "Operating mode; VCC = 5.5V; no load; fSCL = 100kHz",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Standby Current (VI = GND)",
"symbol": "Istb",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 1.1,
"max": 1.5,
"conditions": "Standby mode; VCC = 5.5V; no load; VI = GND; fSCL = 0kHz; I/O = inputs",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Standby Current (VI = VCC)",
"symbol": "Istb",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 0.25,
"max": 1,
"conditions": "Standby mode; VCC = 5.5V; no load; VI = VCC; fSCL = 0kHz; I/O = inputs",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power-On Reset Voltage",
"symbol": "VPOR",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 1.16,
"max": 1.41,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low Level Input Voltage (SCL, SDA)",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "Printed max is +0.3VCC (not numeric)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High Level Input Voltage (SCL, SDA)",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 5.5,
"conditions": "Printed min is 0.7VCC (not numeric)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low Level Output Current (SDA)",
"symbol": "IOL",
"kind": "electrical",
"unit": "mA",
"min": 3,
"typ": null,
"max": null,
"conditions": "VOL = 0.4V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Leakage Current (SCL, SDA)",
"symbol": "IL",
"kind": "electrical",
"unit": "μA",
"min": -1,
"typ": null,
"max": 1,
"conditions": "VI = VCC = GND",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input Capacitance (SCL, SDA)",
"symbol": "Ci",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 6,
"max": 10,
"conditions": "VI = GND",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low Level Input Voltage (I/O)",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.81,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Input Voltage (I/O)",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Low Level Output Current (I/O)",
"symbol": "IOL",
"kind": "electrical",
"unit": "mA",
"min": 8,
"typ": 20,
"max": null,
"conditions": "VCC = 2.3V to 5.5V; VOL = 0.5V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Low Level Output Current (I/O)",
"symbol": "IOL",
"kind": "electrical",
"unit": "mA",
"min": 10,
"typ": 24,
"max": null,
"conditions": "VCC = 2.3V to 5.5V; VOL = 0.7V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Output Voltage (I/O)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": null,
"max": null,
"conditions": "IOH = -8mA; VCC = 2.3V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Output Voltage (I/O)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 1.7,
"typ": null,
"max": null,
"conditions": "IOH = -10mA; VCC = 2.3V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Output Voltage (I/O)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.6,
"typ": null,
"max": null,
"conditions": "IOH = -8mA; VCC = 3.0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Output Voltage (I/O)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.5,
"typ": null,
"max": null,
"conditions": "IOH = -10mA; VCC = 3.0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High Level Output Voltage (I/O)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.1,
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