component
LAN9221I-ABZJ
Public Made by Adomby adom
Microchip Tech Interface - Specialized, QFN-56-EP(8x8). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "lan9221i-abzj",
"title": "LAN9221I-ABZJ",
"brief": "Microchip Tech Interface - Specialized, QFN-56-EP(8x8). 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",
"lan9221i-abzj",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "LAN9221I-ABZJ",
"manufacturer": "Microchip Tech",
"package": "QFN-56-EP(8x8)",
"pin_count": 57,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "Interface - Specialized",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c1f68427dedfc2154226a824a897a27c.pdf",
"parts": {
"symbol": "lan9221i-abzj.kicad_sym",
"footprint": "lan9221i-abzj.kicad_mod",
"model_3d": "lan9221i-abzj-hero.glb",
"model_3d_plain": "lan9221i-abzj-etched.glb",
"model_3d_step": "lan9221i-abzj-etched.step",
"model_3d_step_plain": "lan9221i-abzj.step",
"lbr": "lan9221i-abzj.lbr"
},
"distributor_links": {
"lcsc": "C478092",
"digikey": "LAN9221I-ABZJ-ND",
"mouser": "886-LAN9221I-ABZJ"
},
"distributor_check": {
"checked_at": "2026-10-30T16:37:21Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "LAN9221I-ABZJ-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "886-LAN9221I-ABZJ",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VDD33REG",
"type": "power_in",
"description": "+3.3V power supply for the internal +1.8V core regulator."
},
{
"number": "2",
"name": "VDD18CORE",
"type": "power_out",
"description": "+1.8V output from the internal core regulator; must be connected together with pin 37 and each pin needs a 0.01uF decoupling capacitor, with a 4.7uF bulk capacitor (<2 Ohm ESR) in parallel on pin 2, and must not supply other external devices."
},
{
"number": "3",
"name": "GPIO0/nLED1",
"type": "bidirectional",
"description": "General purpose I/O 0, programmable as push-pull output, open-drain output or Schmitt-triggered input, also multiplexed as nLED1 which is driven low at 100Mb operation."
},
{
"number": "4",
"name": "GPIO1/nLED2",
"type": "bidirectional",
"description": "General purpose I/O 1, programmable as push-pull, open-drain or input, also multiplexed as nLED2 which is driven low when a valid link is detected and flashes for activity."
},
{
"number": "5",
"name": "GPIO2/nLED3",
"type": "bidirectional",
"description": "General purpose I/O 2, programmable as push-pull, open-drain or input, also multiplexed as nLED3 which is driven low when the link operates in full-duplex mode."
},
{
"number": "6",
"name": "A7",
"type": "input",
"description": "Bit 7 of the 7-bit host address port used to select internal CSRs and TX/RX FIFOs; ignored when FIFO_SEL is high."
},
{
"number": "7",
"name": "A6",
"type": "input",
"description": "Bit 6 of the 7-bit host address port used to select internal CSRs and TX/RX FIFOs; ignored when FIFO_SEL is high."
},
{
"number": "8",
"name": "A5",
"type": "input",
"description": "Bit 5 of the 7-bit host address port used to select internal CSRs and TX/RX FIFOs; ignored when FIFO_SEL is high."
},
{
"number": "9",
"name": "A4",
"type": "input",
"description": "Bit 4 of the 7-bit host address port used to select internal CSRs and TX/RX FIFOs; ignored when FIFO_SEL is high."
},
{
"number": "10",
"name": "A3",
"type": "input",
"description": "Bit 3 of the 7-bit host address port used to select internal CSRs and TX/RX FIFOs; ignored when FIFO_SEL is high."
},
{
"number": "11",
"name": "A2",
"type": "input",
"description": "Host address bit 2 of the 7-bit address port used to select internal CSRs and TX/RX FIFOs."
},
{
"number": "12",
"name": "A1",
"type": "input",
"description": "Host address bit 1 of the 7-bit address port used to select internal CSRs and TX/RX FIFOs."
},
{
"number": "13",
"name": "FIFO_SEL",
"type": "input",
"description": "When driven high, all accesses to the device go to the RX or TX data FIFOs and the upper address inputs A[7:3] are ignored."
},
{
"number": "14",
"name": "TEST",
"type": "input",
"description": "Reserved for internal test; must be connected to ground or pulled low with an external resistor when VDDVARIO is below 3.0V, and may be left unconnected at VDDVARIO = 3.3V."
},
{
"number": "15",
"name": "nRD",
"type": "input",
"description": "Active-low strobe indicating a host read cycle."
},
{
"number": "16",
"name": "nWR",
"type": "input",
"description": "Active-low strobe indicating a write cycle; qualified with nCS, it also wakes the device from a reduced power state."
},
{
"number": "17",
"name": "nCS",
"type": "input",
"description": "Active-low chip select qualifying read and write operations; qualified with nWR it also wakes the device from a reduced power state."
},
{
"number": "18",
"name": "VDDVARIO",
"type": "power_in",
"description": "Variable voltage I/O logic power supply pin, supporting I/O signalling from 1.8V to 3.3V."
},
{
"number": "19",
"name": "D15",
"type": "bidirectional",
"description": "Host data bus bit 15 of the 16-bit bi-directional data port."
},
{
"number": "20",
"name": "D14",
"type": "bidirectional",
"description": "Host data bus bit 14 of the 16-bit bi-directional data port."
},
{
"number": "21",
"name": "D13",
"type": "bidirectional",
"description": "Host data bus bit 13 of the 16-bit bi-directional data port."
},
{
"number": "22",
"name": "D12",
"type": "bidirectional",
"description": "Host data bus bit 12 of the 16-bit bi-directional data port."
},
{
"number": "23",
"name": "D11",
"type": "bidirectional",
"description": "Host data bus bit 11 of the 16-bit bi-directional data port."
},
{
"number": "24",
"name": "VDDVARIO",
"type": "power_in",
"description": "Variable voltage I/O logic power supply pin, supporting I/O signalling from 1.8V to 3.3V."
},
{
"number": "25",
"name": "D10",
"type": "bidirectional",
"description": "Host data bus bit 10 of the 16-bit bi-directional data port."
},
{
"number": "26",
"name": "D9",
"type": "bidirectional",
"description": "Host data bus bit 9 of the 16-bit bi-directional data port."
},
{
"number": "27",
"name": "D8",
"type": "bidirectional",
"description": "Host data bus bit 8 of the 16-bit bi-directional data port."
},
{
"number": "28",
"name": "D7",
"type": "bidirectional",
"description": "Host data bus bit 7 of the 16-bit bi-directional data port."
},
{
"number": "29",
"name": "D6",
"type": "bidirectional",
"description": "Host data bus bit 6 of the 16-bit bi-directional data port."
},
{
"number": "30",
"name": "VDDVARIO",
"type": "power_in",
"description": "Variable voltage I/O logic power supply pin, supporting I/O signalling from 1.8V to 3.3V."
},
{
"number": "31",
"name": "D5",
"type": "bidirectional",
"description": "Host data bus bit 5 of the 16-bit bi-directional data port."
},
{
"number": "32",
"name": "D4",
"type": "bidirectional",
"description": "Host data bus bit 4 of the 16-bit bi-directional data port."
},
{
"number": "33",
"name": "D3",
"type": "bidirectional",
"description": "Host data bus bit 3 of the 16-bit bi-directional data port."
},
{
"number": "34",
"name": "D2",
"type": "bidirectional",
"description": "Host data bus bit 2 of the 16-bit bi-directional data port."
},
{
"number": "35",
"name": "D1",
"type": "bidirectional",
"description": "Host data bus bit 1 of the 16-bit bi-directional data port."
},
{
"number": "36",
"name": "D0",
"type": "bidirectional",
"description": "Host data bus bit 0 of the 16-bit bi-directional data port."
},
{
"number": "37",
"name": "VDD18CORE",
"type": "power_out",
"description": "+1.8V output from the internal core regulator; must be connected together with pin 2 and each pin needs a 0.01uF decoupling capacitor, and must not supply other external devices."
},
{
"number": "38",
"name": "EEDIO/GPO3",
"type": "bidirectional",
"description": "Serial EEPROM data I/O (optional), or general purpose output GPO3, or a monitor of TX_EN/TX_CLK; it cannot function as a general purpose input."
},
{
"number": "39",
"name": "EECS",
"type": "output",
"description": "Serial EEPROM chip select; deasserted when pins 38 or 40 are configured as GPO or monitor signals so the EEPROM is never accessed unintentionally."
},
{
"number": "40",
"name": "EECLK/GPO4",
"type": "bidirectional",
"description": "Serial EEPROM clock, or general purpose output GPO4, or a monitor of RX_DV/RX_CLK; it must not be pulled low by an external resistor or driven low externally, and must be pulled up when VDDVARIO is below 3.0V."
},
{
"number": "41",
"name": "PME",
"type": "output",
"description": "Wakeup indicator asserted when a wake event is detected, with programmable polarity and buffer type; asserting PME does not by itself wake the device."
},
{
"number": "42",
"name": "nRESET",
"type": "input",
"description": "Active-low reset input that resets all logic and registers, pulled high by a weak internal pull-up, and must be reset on power-up."
},
{
"number": "43",
"name": "IRQ",
"type": "output",
"description": "Programmable interrupt request with programmable polarity, source and buffer type, configurable as open-drain for sharing."
},
{
"number": "44",
"name": "TPO-",
"type": "output",
"description": "Transmit negative output in normal connection; acts as receive negative input when HP Auto-MDIX detects or is set to a reversed connection."
},
{
"number": "45",
"name": "TPO+",
"type": "output",
"description": "Transmit positive output in normal connection; acts as receive positive input when HP Auto-MDIX detects or is set to a reversed connection."
},
{
"number": "46",
"name": "VDD33A",
"type": "power_in",
"description": "+3.3V analog power supply pin."
},
{
"number": "47",
"name": "TPI-",
"type": "input",
"description": "Receive negative input in normal connection; acts as transmit negative output when HP Auto-MDIX reverses the connection."
},
{
"number": "48",
"name": "TPI+",
"type": "input",
"description": "Receive positive input in normal connection; acts as transmit positive input when HP Auto-MDIX reverses the connection."
},
{
"number": "49",
"name": "VDD33A",
"type": "power_in",
"description": "+3.3V analog power supply pin."
},
{
"number": "50",
"name": "EXRES",
"type": "input",
"description": "PHY external bias resistor pin that must be connected to ground through a 12.4K ohm 1% resistor."
},
{
"number": "51",
"name": "VDD33A",
"type": "power_in",
"description": "+3.3V analog power supply pin."
},
{
"number": "52",
"name": "AMDIX_EN",
"type": "input",
"description": "Enables Auto-MDIX when pulled high or left unconnected and disables it when pulled low; must be pulled to a valid level by an external resistor when VDDVARIO is below 3.0V."
},
{
"number": "53",
"name": "VDD18A",
"type": "power_in",
"description": "+1.8V analog power supply pin that must be connected externally to VDD18CORE."
},
{
"number": "54",
"name": "XTAL2",
"type": "output",
"description": "External 25MHz crystal output; should be left unconnected when pin 55 is driven by a single-ended TTL oscillator."
},
{
"number": "55",
"name": "XTAL1/CLKIN",
"type": "input",
"description": "External 25MHz crystal input, which can alternatively be driven by a single-ended TTL oscillator (CLKIN)."
},
{
"number": "56",
"name": "VDDVARIO",
"type": "power_in",
"description": "Variable voltage I/O logic power supply pin, supporting I/O signalling from 1.8V to 3.3V."
},
{
"number": "57",
"name": "VSS",
"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 8x8 body size is not stated in the extracted text. The only package reference is '56-QFN' (Table; The ordering code LAN9221I-ABZJ does not appear in the extracted pages. The datasheet covers LAN9221; The exposed pad has no printed pin number. It is listed as 'EXPOSED PAD MUST BE CONNECTED TO VSS' an",
"exposed pad 57 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"1/57 pins cited to the wrong page (name found elsewhere): ['54:XTAL2@p11']"
],
"pages_sent": 27,
"cost_usd": 0.1546,
"at": "2026-10-30T16:37:00"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/c1f68427dedfc2154226a824a897a27c.pdf",
"pages": 141,
"sha256": "e55ed0f7c6ba0abd",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 57,
"described": 57,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "lan9221i-abzj.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
8,
8,
1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "54eb482f12c9d8b70c1bfc78306a1c34f412f3556e225cbd097840e5abdb7981",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "lan9221i-abzj-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
8,
8,
1
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "40d0c0b2fcd8d94c482e5e08bc2df7e9ae5c701f1fdd5795f88a0f76be6fe4d2",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-56-EP(8x8)",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "57"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "e55ed0f7c6ba0abd695cc2c0419a9297c84a96113f086cf3944d2e8ee0e6791e",
"rows": [
{
"name": "Supply Voltage (VDDVARIO, VDD33REG, VDD33A)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": 0,
"typ": null,
"max": 3.6,
"conditions": "Note 7-1",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Positive voltage on signal pins, with respect to ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "Note 7-2: does not apply to XTAL1/CLKIN, XTAL2, EXRES",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Negative voltage on signal pins, with respect to ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "Note 7-3: does not apply to EXRES",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Positive voltage on XTAL1/CLKIN, with respect to ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 4.6,
"conditions": "",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Positive voltage on XTAL2, with respect to ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 2.5,
"conditions": "",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 125,
"source": "datasheet"
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{
"name": "HBM ESD Performance",
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"kind": "absolute_maximum",
"unit": "kV",
"min": -5,
"typ": null,
"max": 5,
"conditions": "HBM; printed as +/-5kV",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Ambient Operating Temperature in Still Air (TA), industrial version",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Note 7-4: -40°C to +85°C for industrial version",
"source_page": 125,
"source": "datasheet"
},
{
"name": "Supply Voltage (VDDVARIO)",
"symbol": "VDDVARIO",
"kind": "recommended_operating",
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"max": 3.6,
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"source_page": 125,
"source": "datasheet"
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{
"name": "Ambient Operating Temperature in Still Air (TA), industrial version",
"symbol": "TA",
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"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
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