component
KSZ8091RNBCA
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": "ksz8091rnbca",
"title": "KSZ8091RNBCA",
"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",
"interface ics",
"ksz8091rnbca",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "KSZ8091RNBCA",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Interface ICs",
"subcategory": "Ethernet ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e508b208ca514ff0aeab9e29f1b0f53a.pdf",
"parts": {
"symbol": "ksz8091rnbca.kicad_sym",
"footprint": "ksz8091rnbca.kicad_mod",
"model_3d": "ksz8091rnbca-hero.glb",
"model_3d_plain": "ksz8091rnbca-etched.glb",
"model_3d_step": "ksz8091rnbca-etched.step",
"model_3d_step_plain": "ksz8091rnbca.step",
"lbr": "ksz8091rnbca.lbr"
},
"distributor_links": {
"lcsc": "C144312",
"digikey": "576-4357-ND",
"mouser": "998-KSZ8091RNBCA"
},
"distributor_check": {
"checked_at": "2026-10-26T18:31:31Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "576-4357-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "998-KSZ8091RNBCA",
"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 KSZ8091RNB; 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 in 25 MHz mode, 50 MHz ±50 ppm oscillator/external clock in 50 MHz mode."
},
{
"number": "10",
"name": "REXT",
"type": "passive",
"description": "Sets PHY transmit output current; connect a 6.49 kΩ resistor to ground."
},
{
"number": "11",
"name": "MDIO",
"type": "bidirectional",
"description": "Management interface 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 clock input with internal pull-up, synchronous to MDIO."
},
{
"number": "13",
"name": "PHYAD0",
"type": "bidirectional",
"description": "Pull-up/pull-down value is latched as PHYADDR[0] at de-assertion of reset (internal pull-up during reset)."
},
{
"number": "14",
"name": "PHYAD1",
"type": "bidirectional",
"description": "Pull-up/pull-down value is latched as PHYADDR[1] at de-assertion of reset (internal pull-down during reset)."
},
{
"number": "15",
"name": "RXD1/PHYAD2",
"type": "bidirectional",
"description": "RMII Receive Data output[1]; latched as PHYADDR[2] at de-assertion of reset (internal pull-down)."
},
{
"number": "16",
"name": "RXD0/DUPLEX",
"type": "bidirectional",
"description": "RMII Receive Data output[0]; latched as DUPLEX at de-assertion of reset (internal pull-up, default half-duplex)."
},
{
"number": "17",
"name": "VDDIO",
"type": "power_in",
"description": "3.3V, 2.5V, or 1.8V digital VDD."
},
{
"number": "18",
"name": "CRS_DV/CONFIG2",
"type": "bidirectional",
"description": "RMII Carrier Sense/Receive Data Valid output; latched as CONFIG2 at de-assertion of reset (internal pull-down)."
},
{
"number": "19",
"name": "REF_CLK/B-CAST_OFF",
"type": "bidirectional",
"description": "Outputs the 50 MHz RMII reference clock in 25 MHz mode (no connect in 50 MHz mode); latched as B-CAST_OFF at de-assertion of reset (internal pull-down)."
},
{
"number": "20",
"name": "RXER/ISO",
"type": "bidirectional",
"description": "RMII Receive Error output; latched as ISOLATE at de-assertion of reset (internal pull-down)."
},
{
"number": "21",
"name": "INTRP/PME_N2/NAND_Tree#",
"type": "bidirectional",
"description": "Programmable interrupt (Reg 1Bh) or PME_N output, weak pull-up open-drain requiring external 1.0 kΩ pull-up to VDDIO; latched as NAND Tree# at de-assertion of reset."
},
{
"number": "22",
"name": "PME_EN",
"type": "bidirectional",
"description": "Latched as PME_EN at de-assertion of reset (internal pull-down, default disabled)."
},
{
"number": "23",
"name": "TXEN",
"type": "input",
"description": "RMII Transmit Enable input."
},
{
"number": "24",
"name": "TXD0",
"type": "input",
"description": "RMII Transmit Data input[0]."
},
{
"number": "25",
"name": "TXD1",
"type": "input",
"description": "RMII Transmit Data input[1]."
},
{
"number": "26",
"name": "NC",
"type": "unconnected",
"description": "No connect; pin is not bonded and can be left floating."
},
{
"number": "27",
"name": "NC",
"type": "unconnected",
"description": "No connect; pin is not bonded and can be left floating."
},
{
"number": "28",
"name": "CONFIG0",
"type": "bidirectional",
"description": "Latched as CONFIG0 at de-assertion of reset (internal pull-down)."
},
{
"number": "29",
"name": "CONFIG1",
"type": "bidirectional",
"description": "Latched as CONFIG1 at de-assertion of reset (internal pull-down); also NAND tree output."
},
{
"number": "30",
"name": "LED0/PME_N1/NWAYEN",
"type": "bidirectional",
"description": "Programmable LED0 output or PME_N output (weak pull-up open-drain, external 1.0 kΩ pull-up to VDDIO); latched as auto-negotiation enable at de-assertion of reset."
},
{
"number": "31",
"name": "LED1/SPEED",
"type": "bidirectional",
"description": "Programmable LED1 output; latched as SPEED (Register 0h bit 13) at de-assertion of reset (internal pull-up)."
},
{
"number": "32",
"name": "RST#",
"type": "input",
"description": "Chip reset, active low, with internal pull-up."
},
{
"number": "33",
"name": "PADDLE",
"type": "power_in",
"description": "Exposed paddle on bottom of chip; ground."
}
],
"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 gives the exposed paddle no pin number, only 'PADDLE'. I used '33' as a placeholder.; The datasheet gives no electrical type for these pins. I chose the KiCad types from the signal descr; The datasheet text has inconsistent RMII back-to-back strap values: Table 2-4 gives CONFIG[2:0]=110,",
"2/33 pins cited to the wrong page (name found elsewhere): ['8:XO@p10', '33:PADDLE@p13']"
],
"pages_sent": 36,
"cost_usd": 0.351,
"at": "2026-10-26T18:31:16"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/e508b208ca514ff0aeab9e29f1b0f53a.pdf",
"pages": 80,
"sha256": "861764ca6f1a2d5c",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ksz8091rnbca.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
0.875
],
"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": "ksz8091rnbca-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
0.875
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "801cead46f624803b28b71370610177590aec31206c0caeb26b21dea82c1ae17",
"checked": "2026-10-26",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Interface ICs",
"Pins": "33"
},
"appearance": {
"housing": {
"quote": "1 = RXC clock is stoppable for 100BASE-TX",
"page": 52,
"doc": "ds.pdf",
"material": "ppa"
},
"version": 1,
"datasheet_sha256": "861764ca6f1a2d5c1c0b1b89690dba63b3e15f593d4ceb461b9d7cfb0b4d4793"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "861764ca6f1a2d5c1c0b1b89690dba63b3e15f593d4ceb461b9d7cfb0b4d4793",
"rows": [
{
"name": "Supply Voltage VDD_1.2",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 1.8,
"conditions": "VDD_1.2",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Supply Voltage VDDIO, VDDA_3.3",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 5,
"conditions": "VDDIO, VDDA_3.3",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Input Voltage (all inputs)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 5,
"conditions": "all inputs",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Output Voltage (all outputs)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 5,
"conditions": "all outputs",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Lead Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "soldering, 10s",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Supply Voltage 3.3V",
"symbol": "VDDIO_3.3, VDDA_3.3",
"kind": "recommended_operating",
"unit": "V",
"min": 3.135,
"typ": null,
"max": 3.465,
"conditions": "VDDIO_3.3, VDDA_3.3",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Supply Voltage VDDIO 2.5V",
"symbol": "VDDIO_2.5",
"kind": "recommended_operating",
"unit": "V",
"min": 2.375,
"typ": null,
"max": 2.625,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Supply Voltage VDDIO 1.8V",
"symbol": "VDDIO_1.8",
"kind": "recommended_operating",
"unit": "V",
"min": 1.71,
"typ": null,
"max": 1.89,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Ambient Temperature Commercial",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": 0,
"typ": null,
"max": 70,
"conditions": "Commercial",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Ambient Temperature Industrial",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Industrial",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Maximum Junction Temperature",
"symbol": "TJ max",
"kind": "recommended_operating",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Thermal Resistance",
"symbol": "ΘJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 45.87,
"max": null,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Thermal Resistance",
"symbol": "ΘJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 15.85,
"max": null,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"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"
},
{
"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"
},
{
"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,
"max": 0.7,
"conditions": "VDDIO = 2.5V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Input Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "VDDIO = 1.8V",
"source_page": 58,
"source": "datasheet"
},
{
"name": "Input Current",
"symbol": "|IIN|",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 10,
"conditions": "VIN = GND ~ VDDIO",
"source_page": 58,
"source": "datasheet"
},
{
"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"
},
{
"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"
},
{
"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"
},
{
"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,
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