component
KSZ8091MNXIA-TR
Public Made by Adomby adom
Microchip Tech Ethernet ICs, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "ksz8091mnxia-tr",
"title": "KSZ8091MNXIA-TR",
"brief": "Microchip Tech Ethernet ICs, QFN-32-EP(5x5). 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",
"ksz8091mnxia-tr",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "KSZ8091MNXIA-TR",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "Ethernet ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d114de401a20a1f9cb8e07f83bc6853b.pdf",
"parts": {
"symbol": "ksz8091mnxia-tr.kicad_sym",
"footprint": "ksz8091mnxia-tr.kicad_mod",
"model_3d": "ksz8091mnxia-tr-hero.glb",
"model_3d_plain": "ksz8091mnxia-tr-etched.glb",
"model_3d_step": "ksz8091mnxia-tr-etched.step",
"model_3d_step_plain": "ksz8091mnxia-tr.step",
"lbr": "ksz8091mnxia-tr.lbr"
},
"distributor_links": {
"lcsc": "C631646",
"digikey": "KSZ8091MNXIA-TR-ND",
"mouser": "998-KSZ8091MNXIA-TR"
},
"distributor_check": {
"checked_at": "2026-10-26T18:32:13Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "KSZ8091MNXIA-TR-ND",
"status": "found",
"lifecycle": "Active"
},
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"pn": "998-KSZ8091MNXIA-TR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "2",
"name": "VDD_1.2",
"type": "power_out",
"description": "1.2V core VDD supplied by the KSZ8091MNX itself; decouple with 2.2 µF and 0.1 µF capacitors to ground."
},
{
"number": "3",
"name": "VDDA_3.3",
"type": "power_in",
"description": "3.3V analog VDD; connect to the board 3.3V supply through a ferrite bead and decouple with 22 µF and 0.1 µF capacitors to ground."
},
{
"number": "4",
"name": "RXM",
"type": "bidirectional",
"description": "Physical receive or transmit signal (- differential)."
},
{
"number": "5",
"name": "RXP",
"type": "bidirectional",
"description": "Physical receive or transmit signal (+ differential)."
},
{
"number": "6",
"name": "TXM",
"type": "bidirectional",
"description": "Physical transmit or receive signal (- differential)."
},
{
"number": "7",
"name": "TXP",
"type": "bidirectional",
"description": "Physical transmit or receive signal (+ differential)."
},
{
"number": "8",
"name": "XO",
"type": "output",
"description": "Crystal feedback for 25 MHz crystal; no connect if an oscillator or external clock source is used."
},
{
"number": "9",
"name": "XI",
"type": "input",
"description": "Crystal/oscillator/external clock input, 25 MHz ±50 ppm."
},
{
"number": "10",
"name": "REXT",
"type": "input",
"description": "Sets PHY transmit output current; connect a 6.49 kΩ resistor to ground."
},
{
"number": "11",
"name": "MDIO",
"type": "bidirectional",
"description": "Management interface (MII) data I/O with weak pull-up, open-drain, requires an external 1.0 kΩ pull-up resistor."
},
{
"number": "12",
"name": "MDC",
"type": "input",
"description": "Management interface (MII) clock input with internal pull-up, synchronous to MDIO."
},
{
"number": "13",
"name": "RXD3/PHYAD0",
"type": "bidirectional",
"description": "MII receive data output [3]; at reset de-assertion the strap value is latched as PHYADDR[0] (internal pull-up)."
},
{
"number": "14",
"name": "RXD2/PHYAD1",
"type": "bidirectional",
"description": "MII receive data output [2]; at reset de-assertion the strap value is latched as PHYADDR[1] (internal pull-down)."
},
{
"number": "15",
"name": "RXD1/PHYAD2",
"type": "bidirectional",
"description": "MII receive data output [1]; at reset de-assertion the strap value is latched as PHYADDR[2] (internal pull-down)."
},
{
"number": "16",
"name": "RXD0/DUPLEX",
"type": "bidirectional",
"description": "MII receive data output [0]; at reset de-assertion the strap value is latched as DUPLEX (internal pull-up, default half-duplex)."
},
{
"number": "17",
"name": "VDDIO",
"type": "power_in",
"description": "3.3V, 2.5V, or 1.8V digital VDD; decouple with 22 µF and 0.1 µF capacitors to ground."
},
{
"number": "18",
"name": "RXDV/CONFIG2",
"type": "bidirectional",
"description": "MII receive data valid output; at reset de-assertion the strap value is latched as CONFIG2 (internal pull-down)."
},
{
"number": "19",
"name": "RXC/B-CAST_OFF",
"type": "bidirectional",
"description": "MII receive clock output; at reset de-assertion the strap value is latched as B-CAST_OFF (internal pull-down)."
},
{
"number": "20",
"name": "RXER/ISO",
"type": "bidirectional",
"description": "MII receive error output; at reset de-assertion the strap value is latched as ISOLATE (internal pull-down)."
},
{
"number": "21",
"name": "INTRP/PME_N2/NAND_TREE#",
"type": "bidirectional",
"description": "Programmable open-drain interrupt or PME_N (option 2) output with weak pull-up, requiring an external 1.0 kΩ pull-up to VDDIO; latched as NAND Tree# at reset de-assertion."
},
{
"number": "22",
"name": "TXC/PME_EN",
"type": "bidirectional",
"description": "MII transmit clock output (no connection in MII back-to-back mode); at reset de-assertion the strap value is latched as PME_EN (internal pull-down)."
},
{
"number": "23",
"name": "TXEN",
"type": "input",
"description": "MII transmit enable input."
},
{
"number": "24",
"name": "TXD0",
"type": "input",
"description": "MII transmit data input [0]."
},
{
"number": "25",
"name": "TXD1",
"type": "input",
"description": "MII transmit data input [1]."
},
{
"number": "26",
"name": "TXD2",
"type": "input",
"description": "MII transmit data input [2]."
},
{
"number": "27",
"name": "TXD3",
"type": "input",
"description": "MII transmit data input [3]."
},
{
"number": "28",
"name": "COL/CONFIG0",
"type": "bidirectional",
"description": "MII collision detect output; at reset de-assertion the strap value is latched as CONFIG0 (internal pull-down)."
},
{
"number": "29",
"name": "CRS/CONFIG1",
"type": "bidirectional",
"description": "MII carrier sense output; at reset de-assertion the strap value is latched as CONFIG1 (internal pull-down)."
},
{
"number": "30",
"name": "LED0/PME_N1/NWAYEN",
"type": "bidirectional",
"description": "Programmable LED0 or PME_N (option 1, open-drain, requires external 1.0 kΩ pull-up to VDDIO) output; latched as auto-negotiation enable at reset de-assertion (internal pull-up)."
},
{
"number": "31",
"name": "TXER",
"type": "input",
"description": "MII transmit error input with internal pull-down; can be left unconnected in non-EEE mode and should be pulled high for NAND Tree testing."
},
{
"number": "32",
"name": "RST#",
"type": "input",
"description": "Chip reset, active low, with internal pull-up."
},
{
"number": "33",
"name": "PADDLE",
"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-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Exposed pad is labeled 'PADDLE' in the datasheet with no numeric pin number; kept as printed (many l; MNX (MII) variant selected from the MPN (KSZ8091MNXIA-TR); the datasheet also covers the RNB variant; Pin types for strap-in/IO multiplexed pins (Ipu/O, Ipd/O, Ipu/Opu) mapped to bidirectional; VDD_1.2 ",
"1/33 pins cited to the wrong page (name found elsewhere): ['8:XO@p6']"
],
"pages_sent": 36,
"cost_usd": 0.3463,
"at": "2026-10-26T18:31:55"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/d114de401a20a1f9cb8e07f83bc6853b.pdf",
"pages": 80,
"sha256": "a7e3aab56aae2ff4",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-26",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ksz8091mnxia-tr-etched.step",
"role": "eda",
"up": "Z",
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"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"footprint_binding": "identity",
"sha256": "69430d472edaa31a70e44ed0464d476470f9c4e042b0cd3ece84c933b0fac4df",
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]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "33"
},
"appearance": {
"housing": {
"quote": "1 = RXC clock is stoppable for 100BASE-TX",
"page": 52,
"doc": "ds.pdf",
"material": "ppa"
},
"version": 1,
"datasheet_sha256": "a7e3aab56aae2ff49d9b0aa1ea07e278b98cabd7e83bd29e1b99518239012547"
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"characteristics": {
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"source": "datasheet",
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"rows": [
{
"name": "Input High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Input High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": null,
"max": null,
"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Input High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 1.3,
"typ": null,
"max": null,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Input Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.8,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Input Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
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"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
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{
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"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Input Current",
"symbol": "|IIN|",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 10,
"conditions": "VIN = GND ~ VDDIO",
"source_page": 58,
"source": "datasheet"
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{
"name": "Output High Voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.4,
"typ": null,
"max": null,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Output High Voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Output High Voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 1.5,
"typ": null,
"max": null,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Output Low Voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
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{
"name": "Output Low Voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.3,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Output Tri-State Leakage",
"symbol": "|IOZ|",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 10,
"conditions": "",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Up Resistance",
"symbol": "pu",
"kind": "electrical",
"unit": "kΩ",
"min": 30,
"typ": 45,
"max": 73,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Up Resistance",
"symbol": "pu",
"kind": "electrical",
"unit": "kΩ",
"min": 39,
"typ": 61,
"max": 102,
"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Up Resistance",
"symbol": "pu",
"kind": "electrical",
"unit": "kΩ",
"min": 48,
"typ": 99,
"max": 178,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Down Resistance",
"symbol": "pd",
"kind": "electrical",
"unit": "kΩ",
"min": 26,
"typ": 43,
"max": 79,
"conditions": "VDDIO = 3.3V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Down Resistance",
"symbol": "pd",
"kind": "electrical",
"unit": "kΩ",
"min": 34,
"typ": 59,
"max": 113,
"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Internal Pull-Down Resistance",
"symbol": "pd",
"kind": "electrical",
"unit": "kΩ",
"min": 53,
"typ": 99,
"max": 200,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Peak Differential Output Voltage",
"symbol": "VO",
"kind": "electrical",
"unit": "V",
"min": 0.95,
"typ": null,
"max": 1.05,
"conditions": "100Ω termination across differential output",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Output Voltage Imbalance",
"symbol": "VIMB",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": null,
"max": 2,
"conditions": "100Ω termination across differential output",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Rise/Fall Time",
"symbol": "tr/tf",
"kind": "electrical",
"unit": "ns",
"min": 3,
"typ": null,
"max": 5,
"conditions": "",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Rise/Fall Time Imbalance",
"symbol": "",
"kind": "electrical",
"unit": "ns",
"min": 0,
"typ": null,
"max": 0.5,
"conditions": "",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Duty Cycle Distortion",
"symbol": "",
"kind": "electrical",
"unit": "ns",
"min": -0.25,
"typ": null,
"max": 0.25,
"conditions": "",
"source_page": 58,
"source": "datasheet"
},
{
"name": "100BASE-TX Overshoot",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": null,
"max": 5,
"conditions": "",
"source_page": 58,
"source": "datasheet"
},
{
"name": "10BASE-T Peak Differential Output Voltage",
"symbol": "VP",
"kind": "electrical",
"unit": "V",
"min": 2.2,
"typ": null,
"max": 2.8,
"conditions": "100Ω termination across differential output",
"source_page": 59,
"source": "datasheet"
},
{
"name": "10BASE-T Jitter Added",
"symbol": "",
"kind": "electrical",
"unit": "ns",
"min": null,
"typ": null,
"max": 3.5,
"conditions": "Peak-to-peak",
"source_page": 59,
"source": "datasheet"
},
{
"name": "Supply Voltage VDD_1.2",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 1.8,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Supply Voltage VDDIO, VDDA_3.3",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
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