component
KSZ9021GN
Public Made by Adomby adom
Microchip Tech Ethernet Transceivers, QFN-64-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": "ksz9021gn",
"title": "KSZ9021GN",
"brief": "Microchip Tech Ethernet Transceivers, QFN-64-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",
"interface",
"ksz9021gn",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "KSZ9021GN",
"manufacturer": "Microchip Tech",
"package": "QFN-64-EP(8x8)",
"pin_count": 65,
"category": "Interface",
"subcategory": "Ethernet Transceivers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588883941881761792",
"parts": {
"symbol": "ksz9021gn.kicad_sym",
"footprint": "ksz9021gn.kicad_mod",
"model_3d": "ksz9021gn-hero.glb",
"model_3d_plain": "ksz9021gn-etched.glb",
"model_3d_step": "ksz9021gn-etched.step",
"model_3d_step_plain": "ksz9021gn.step",
"lbr": "ksz9021gn.lbr"
},
"distributor_links": {
"lcsc": "C220829"
},
"distributor_check": {
"checked_at": "2026-10-18T18:18:03Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "2",
"name": "TXRXP_A",
"type": "bidirectional",
"description": "Media Dependent Interface[0], positive signal of differential pair; BI_DA+ (MDI) or BI_DB+ (MDI-X) in 1000Base-T, TX+/RX+ in 10/100."
},
{
"number": "3",
"name": "TXRXM_A",
"type": "bidirectional",
"description": "Media Dependent Interface[0], negative signal of differential pair; BI_DA- (MDI) or BI_DB- (MDI-X) in 1000Base-T, TX-/RX- in 10/100."
},
{
"number": "4",
"name": "AVDDL",
"type": "power_in",
"description": "1.2V analog VDD."
},
{
"number": "5",
"name": "AVDDL",
"type": "power_in",
"description": "1.2V analog VDD."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "7",
"name": "TXRXP_B",
"type": "bidirectional",
"description": "Media Dependent Interface[1], positive signal of differential pair; BI_DB+ (MDI) or BI_DA+ (MDI-X) in 1000Base-T, RX+/TX+ in 10/100."
},
{
"number": "8",
"name": "TXRXM_B",
"type": "bidirectional",
"description": "Media Dependent Interface[1], negative signal of differential pair; BI_DB- (MDI) or BI_DA- (MDI-X) in 1000Base-T, RX-/TX- in 10/100."
},
{
"number": "9",
"name": "AGNDH",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "10",
"name": "TXRXP_C",
"type": "bidirectional",
"description": "Media Dependent Interface[2], positive signal of differential pair; BI_DC+ (MDI) or BI_DD+ (MDI-X) in 1000Base-T, not used in 10/100."
},
{
"number": "11",
"name": "TXRXM_C",
"type": "bidirectional",
"description": "Media Dependent Interface[2], negative signal of differential pair; BI_DC- (MDI) or BI_DD- (MDI-X) in 1000Base-T, not used in 10/100."
},
{
"number": "12",
"name": "AVDDL",
"type": "power_in",
"description": "1.2V analog VDD."
},
{
"number": "13",
"name": "AVDDL",
"type": "power_in",
"description": "1.2V analog VDD."
},
{
"number": "14",
"name": "TXRXP_D",
"type": "bidirectional",
"description": "Media Dependent Interface[3], positive signal of differential pair; BI_DD+ (MDI) or BI_DC+ (MDI-X) in 1000Base-T, not used in 10/100."
},
{
"number": "15",
"name": "TXRXM_D",
"type": "bidirectional",
"description": "Media Dependent Interface[3], negative signal of differential pair; BI_DD- (MDI) or BI_DC- (MDI-X) in 1000Base-T, not used in 10/100."
},
{
"number": "16",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "17",
"name": "LED2/PHYAD1",
"type": "bidirectional",
"description": "Programmable LED2 output, and PHYAD[1] strap latched during power-up/reset."
},
{
"number": "18",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V or 2.5V digital VDD."
},
{
"number": "19",
"name": "LED1/PHYAD0",
"type": "bidirectional",
"description": "Programmable LED1 output, and PHYAD[0] strap latched during power-up/reset."
},
{
"number": "20",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "21",
"name": "TXD0",
"type": "input",
"description": "GMII/MII transmit data 0 input."
},
{
"number": "22",
"name": "TXD1",
"type": "input",
"description": "GMII/MII transmit data 1 input."
},
{
"number": "23",
"name": "TXD2",
"type": "input",
"description": "GMII/MII transmit data 2 input."
},
{
"number": "24",
"name": "TXD3",
"type": "input",
"description": "GMII/MII transmit data 3 input."
},
{
"number": "25",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "26",
"name": "TXD4",
"type": "input",
"description": "GMII transmit data 4 input; not used in MII mode and can be driven high or low."
},
{
"number": "27",
"name": "TXD5",
"type": "input",
"description": "GMII transmit data 5 input; not used in MII mode and can be driven high or low."
},
{
"number": "28",
"name": "TXD6",
"type": "input",
"description": "GMII transmit data 6 input; not used in MII mode and can be driven high or low."
},
{
"number": "29",
"name": "TXD7",
"type": "input",
"description": "GMII transmit data 7 input; not used in MII mode and can be driven high or low."
},
{
"number": "30",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V or 2.5V digital VDD."
},
{
"number": "31",
"name": "TX_ER",
"type": "input",
"description": "GMII/MII transmit error input; tie low if the MAC does not provide TX_ER."
},
{
"number": "32",
"name": "GTX_CLK",
"type": "input",
"description": "GMII transmit reference clock input (125MHz for 1000Mbps), sourced by the MAC."
},
{
"number": "33",
"name": "TX_EN",
"type": "input",
"description": "GMII/MII transmit enable input."
},
{
"number": "34",
"name": "RXD7",
"type": "output",
"description": "GMII receive data 7 output; not used in MII mode and driven low."
},
{
"number": "35",
"name": "RXD6",
"type": "output",
"description": "GMII receive data 6 output; not used in MII mode and driven low."
},
{
"number": "36",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "37",
"name": "RXD5",
"type": "output",
"description": "GMII receive data 5 output; not used in MII mode and driven low."
},
{
"number": "38",
"name": "RXD4",
"type": "output",
"description": "GMII receive data 4 output; not used in MII mode and driven low."
},
{
"number": "39",
"name": "RXD3/MODE3",
"type": "bidirectional",
"description": "GMII/MII receive data 3 output, and MODE3 strap latched during power-up/reset."
},
{
"number": "40",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V or 2.5V digital VDD."
},
{
"number": "41",
"name": "RXD2/MODE2",
"type": "bidirectional",
"description": "GMII/MII receive data 2 output, and MODE2 strap latched during power-up/reset."
},
{
"number": "42",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "43",
"name": "RXD1/MODE1",
"type": "bidirectional",
"description": "GMII/MII receive data 1 output, and MODE1 strap latched during power-up/reset."
},
{
"number": "44",
"name": "RXD0/MODE0",
"type": "bidirectional",
"description": "GMII/MII receive data 0 output, and MODE0 strap latched during power-up/reset."
},
{
"number": "45",
"name": "RX_DV/CLK125_EN",
"type": "bidirectional",
"description": "GMII/MII receive data valid output, and CLK125_EN strap (pull-up enables 125MHz clock output) latched during power-up/reset."
},
{
"number": "46",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V or 2.5V digital VDD."
},
{
"number": "47",
"name": "RX_ER",
"type": "output",
"description": "GMII/MII receive error output."
},
{
"number": "48",
"name": "RX_CLK/PHYAD2",
"type": "bidirectional",
"description": "GMII/MII receive reference clock output, and PHYAD[2] strap latched during power-up/reset."
},
{
"number": "49",
"name": "CRS",
"type": "output",
"description": "GMII/MII carrier sense output."
},
{
"number": "50",
"name": "MDC",
"type": "input",
"description": "Management data clock input (internal pull-up), reference clock for MDIO."
},
{
"number": "51",
"name": "MDIO",
"type": "bidirectional",
"description": "Management data input/output (internal pull-up), synchronous to MDC; requires external pull-up to DVDDH of 1.0KΩ to 4.7KΩ."
},
{
"number": "52",
"name": "COL",
"type": "output",
"description": "GMII/MII collision detected output."
},
{
"number": "53",
"name": "INT_N",
"type": "output",
"description": "Programmable interrupt output; requires external pull-up to DVDDH of 1.0KΩ to 4.7KΩ when active low."
},
{
"number": "54",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "55",
"name": "CLK125_NDO/LED_MODE",
"type": "bidirectional",
"description": "125MHz reference clock output for the MAC, and LED_MODE strap latched during power-up/reset (pull-up = Single LED, pull-down = Tri-color Dual LED)."
},
{
"number": "56",
"name": "RESET_N",
"type": "input",
"description": "Chip reset, active low (internal pull-up); strap-ins are latched at the rising edge."
},
{
"number": "57",
"name": "TX_CLK",
"type": "output",
"description": "MII transmit reference clock output."
},
{
"number": "58",
"name": "LDO_O",
"type": "output",
"description": "On-chip 1.2V LDO controller output driving the gate of a P-channel MOSFET; can be left floating if 1.2V is provided by the system."
},
{
"number": "59",
"name": "AVDDL_PLL",
"type": "power_in",
"description": "1.2V analog VDD for PLL."
},
{
"number": "60",
"name": "XO",
"type": "output",
"description": "25MHz crystal feedback; no connect if oscillator or external clock source is used."
},
{
"number": "61",
"name": "XI",
"type": "input",
"description": "Crystal/oscillator/external clock input, 25MHz +/-50ppm tolerance."
},
{
"number": "62",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "63",
"name": "ISET",
"type": "bidirectional",
"description": "Sets transmit output level; connect a 4.99KΩ 1% resistor to ground."
},
{
"number": "64",
"name": "AGNDH",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "65",
"name": "P_GND",
"type": "power_in",
"description": "Exposed paddle on bottom of chip; connect to ground."
}
],
"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 exposed paddle is not given a numeric pin number in the datasheet; it is listed as PADDLE / P_GN; The Pin Configuration figure on page 8 (64-Pin QFN top view) has no text in the extract, so physical; Multiplexed pins (LED2/PHYAD1, LED1/PHYAD0, RXD3-RXD0/MODE, RX_DV/CLK125_EN, RX_CLK/PHYAD2, CLK125_N",
"exposed pad 65 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"1/65 pin names appear NOWHERE in the datasheet text: ['60:XO@p13']"
],
"pages_sent": 24,
"cost_usd": 0.1273,
"at": "2026-10-18T18:17:44"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588883941881761792",
"pages": 53,
"sha256": "2bb1c5d71e42069d",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 65,
"described": 65,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ksz9021gn.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
8,
8,
0.87
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "553641350988a3d949874ef3cbbe3efa6e239859177963f45ba4e900f4c74ccf",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ksz9021gn-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
8,
8,
0.87
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "6029a245fd75fb57309c12fccb2b7de2eb7e38041c146e280cceb7684e0b7fc0",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-64-EP(8x8)",
"Category": "Interface",
"Pins": "65"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "2bb1c5d71e42069dd23cfbef47ab19e00dcc73c2146a4ec37642a14db63bfc32",
"rows": [
{
"name": "Absolute maximum supply voltage (DVDDL, AVDDL, AVDDL_PLL)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VDD+10%",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Absolute maximum supply voltage (AVDDH)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VDD+10%",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Absolute maximum supply voltage (DVDDH)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VDD+10%",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Absolute maximum input voltage (all inputs)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VDD+10%",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Absolute maximum output voltage (all outputs)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VDD+10%",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Lead temperature (soldering)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "soldering, 10 sec",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "Ts",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Supply voltage DVDDL, AVDDL, AVDDL_PLL",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 1.14,
"typ": null,
"max": 1.26,
"conditions": "",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Supply voltage AVDDH",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3.135,
"typ": null,
"max": 3.465,
"conditions": "",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Supply voltage DVDDH @ 3.3V",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3.135,
"typ": null,
"max": 3.465,
"conditions": "DVDDH @ 3.3V",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Supply voltage DVDDH @ 2.5V",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.375,
"typ": null,
"max": 2.625,
"conditions": "DVDDH @ 2.5V",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Ambient temperature TA (commercial, KSZ9021GN)",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": 0,
"typ": null,
"max": 70,
"conditions": "commercial KSZ9021GN",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Maximum junction temperature",
"symbol": "TJ",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "TJ max",
"source_page": 41,
"source": "datasheet"
},
{
"name": "Peak differential output voltage (100Base-TX)",
"symbol": "VO",
"kind": "electrical",
"unit": "V",
"min": 0.95,
"typ": null,
"max": 1.05,
"conditions": "100Ω termination across differential output",
"source_page": 42,
"source": "datasheet"
},
{
"name": "Input current",
"symbol": "IIN",
"kind": "electrical",
"unit": "µA",
"min": -10,
"typ": null,
"max": 10,
"conditions": "VIN = GND ~ VDDIO",
"source_page": 42,
"source": "datasheet"
},
{
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