component
KSZ9021RL
Public Made by Adomby adom
Microchip Tech Receivers & Transceivers, LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "ksz9021rl",
"title": "KSZ9021RL",
"brief": "Microchip Tech Receivers & Transceivers, LQFP-64(10x10). 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",
"logic ics",
"ksz9021rl",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "KSZ9021RL",
"manufacturer": "Microchip Tech",
"package": "LQFP-64(10x10)",
"pin_count": 64,
"category": "Logic ICs",
"subcategory": "Receivers & Transceivers",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b6cab378e9d4b54c5ad5e02f473023f6.pdf",
"parts": {
"symbol": "ksz9021rl.kicad_sym",
"footprint": "ksz9021rl.kicad_mod",
"model_3d": "ksz9021rl-hero.glb",
"model_3d_plain": "ksz9021rl-etched.glb",
"model_3d_step": "ksz9021rl-etched.step",
"model_3d_step_plain": "ksz9021rl.step",
"lbr": "ksz9021rl.lbr"
},
"distributor_links": {
"lcsc": "C634221",
"digikey": "576-3439-ND",
"mouser": "998-KSZ9021RL"
},
"distributor_check": {
"checked_at": "2026-10-30T18:18:04Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "576-3439-ND",
"status": "found",
"lifecycle": "Obsolete"
},
"mouser": {
"pn": "998-KSZ9021RL",
"status": "found",
"lifecycle": "Obsolete"
}
},
"pins": [
{
"number": "1",
"name": "TXRXP_A",
"type": "bidirectional",
"description": "Media Dependent Interface[0] positive differential signal, used as TX+ or RX+ in 10/100 modes (MDI or MDI-X) and as BI_DA+ or BI_DB+ in 1000Base-T mode."
},
{
"number": "2",
"name": "TXRXM_A",
"type": "bidirectional",
"description": "Media Dependent Interface[0] negative differential signal, used as TX- or RX- in 10/100 modes (MDI or MDI-X) and as BI_DA- or BI_DB- in 1000Base-T mode."
},
{
"number": "3",
"name": "AGNDH",
"type": "power_in",
"description": "Analog ground."
},
{
"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": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "7",
"name": "TXRXP_B",
"type": "bidirectional",
"description": "Media Dependent Interface[1] positive differential signal, used as RX+ or TX+ in 10/100 modes (MDI or MDI-X) and as BI_DB+ or BI_DA+ in 1000Base-T mode."
},
{
"number": "8",
"name": "TXRXM_B",
"type": "bidirectional",
"description": "Media Dependent Interface[1] negative differential signal, used as RX- or TX- in 10/100 modes (MDI or MDI-X) and as BI_DB- or BI_DA- in 1000Base-T mode."
},
{
"number": "9",
"name": "AGNDH",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "10",
"name": "TXRXP_C",
"type": "bidirectional",
"description": "Media Dependent Interface[2] positive differential signal, used in 1000Base-T mode (BI_DC+ or BI_DD+); not used in 10/100 modes."
},
{
"number": "11",
"name": "TXRXM_C",
"type": "bidirectional",
"description": "Media Dependent Interface[2] negative differential signal, used in 1000Base-T mode (BI_DC- or BI_DD-); not used in 10/100 modes."
},
{
"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 differential signal, used in 1000Base-T mode (BI_DD+ or BI_DC+); not used in 10/100 modes."
},
{
"number": "15",
"name": "TXRXM_D",
"type": "bidirectional",
"description": "Media Dependent Interface[3] negative differential signal, used in 1000Base-T mode (BI_DD- or BI_DC-); not used in 10/100 modes."
},
{
"number": "16",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "17",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "18",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "19",
"name": "LED2 / PHYAD1",
"type": "bidirectional",
"description": "Programmable LED2 output (function set by LED_MODE strap on pin 55); its pull-up/pull-down is latched as PHYAD[1] at power-up/reset."
},
{
"number": "20",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V/2.5V digital VDD."
},
{
"number": "21",
"name": "LED1 / PHYAD0",
"type": "bidirectional",
"description": "Programmable LED1 output (function set by LED_MODE strap on pin 55); its pull-up/pull-down is latched as PHYAD[0] at power-up/reset."
},
{
"number": "22",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "23",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "24",
"name": "TXD0",
"type": "input",
"description": "RGMII TD0 transmit data bit 0 input from the MAC."
},
{
"number": "25",
"name": "TXD1",
"type": "input",
"description": "RGMII TD1 transmit data bit 1 input from the MAC."
},
{
"number": "26",
"name": "TXD2",
"type": "input",
"description": "RGMII TD2 transmit data bit 2 input from the MAC."
},
{
"number": "27",
"name": "TXD3",
"type": "input",
"description": "RGMII TD3 transmit data bit 3 input from the MAC."
},
{
"number": "28",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "29",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "30",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V/2.5V digital VDD."
},
{
"number": "31",
"name": "TX_ER",
"type": "input",
"description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
},
{
"number": "32",
"name": "GTX_CLK",
"type": "input",
"description": "RGMII TXC transmit reference clock input from the MAC (125MHz for 1000Mbps, 25MHz for 100Mbps, 2.5MHz for 10Mbps)."
},
{
"number": "33",
"name": "TX_EN",
"type": "input",
"description": "RGMII TX_CTL transmit control input from the MAC."
},
{
"number": "34",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "35",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "36",
"name": "RXD3 / MODE3",
"type": "bidirectional",
"description": "RGMII RD3 receive data bit 3 output; its pull-up/pull-down is latched as MODE3 strap at power-up/reset."
},
{
"number": "37",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V/2.5V digital VDD."
},
{
"number": "38",
"name": "RXD2 / MODE2",
"type": "bidirectional",
"description": "RGMII RD2 receive data bit 2 output; its pull-up/pull-down is latched as MODE2 strap at power-up/reset."
},
{
"number": "39",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "40",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "41",
"name": "RXD1 / MODE1",
"type": "bidirectional",
"description": "RGMII RD1 receive data bit 1 output; its pull-up/pull-down is latched as MODE1 strap at power-up/reset."
},
{
"number": "42",
"name": "RXD0 / MODE0",
"type": "bidirectional",
"description": "RGMII RD0 receive data bit 0 output; its pull-up/pull-down is latched as MODE0 strap at power-up/reset."
},
{
"number": "43",
"name": "RX_DV / CLK125_EN",
"type": "bidirectional",
"description": "RGMII RX_CTL receive control output; latched as CLK125_NDO output enable at power-up/reset (pull-up enables, pull-down disables the 125MHz clock)."
},
{
"number": "44",
"name": "DVDDH",
"type": "power_in",
"description": "3.3V/2.5V digital VDD."
},
{
"number": "45",
"name": "RX_ER",
"type": "output",
"description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
},
{
"number": "46",
"name": "RX_CLK / PHYAD2",
"type": "bidirectional",
"description": "RGMII RXC receive reference clock output (125MHz, 25MHz or 2.5MHz); its pull-up/pull-down is latched as PHYAD[2] at power-up/reset."
},
{
"number": "47",
"name": "CRS",
"type": "output",
"description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
},
{
"number": "48",
"name": "MDC",
"type": "input",
"description": "Management Data Clock input, the reference clock for MDIO (pin 49); input has internal pull-up."
},
{
"number": "49",
"name": "MDIO",
"type": "bidirectional",
"description": "Management Data Input/Output, synchronous to MDC (pin 48); requires an external pull-up of 1.0k to 4.7k to 3.3V/2.5V digital VDD."
},
{
"number": "50",
"name": "COL",
"type": "output",
"description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
},
{
"number": "51",
"name": "INT_N",
"type": "output",
"description": "Programmable interrupt output, active low by default (register 1Fh bit 14 selects active high); requires an external pull-up of 1.0k to 4.7k to 3.3V/2.5V digital VDD."
},
{
"number": "52",
"name": "DVDDL",
"type": "power_in",
"description": "1.2V digital VDD."
},
{
"number": "53",
"name": "VSS",
"type": "power_in",
"description": "Digital ground."
},
{
"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; its pull-up/pull-down is latched as LED_MODE at power-up/reset (pull-up = single LED mode, pull-down = tri-color dual LED mode)."
},
{
"number": "56",
"name": "RESET_N",
"type": "input",
"description": "Active-low chip reset; hardware strap configurations are latched on the rising edge (de-assertion) of RESET_N; input has internal pull-up."
},
{
"number": "57",
"name": "LDO_O",
"type": "output",
"description": "On-chip 1.2V LDO controller output that drives the gate of an external P-channel MOSFET for the core; can be left floating if 1.2V is supplied by the system."
},
{
"number": "58",
"name": "AVDDL_PLL",
"type": "power_in",
"description": "1.2V analog VDD for the PLL."
},
{
"number": "59",
"name": "XO",
"type": "output",
"description": "25MHz crystal feedback; a no connect if an oscillator or external clock source is used."
},
{
"number": "60",
"name": "XI",
"type": "input",
"description": "Crystal, oscillator or external clock input, 25MHz ±50ppm tolerance."
},
{
"number": "61",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
},
{
"number": "62",
"name": "ISET",
"type": "bidirectional",
"description": "Sets the transmit output level; connect a 4.99K 1% resistor to ground on this pin."
},
{
"number": "63",
"name": "AGNDH_BG",
"type": "power_in",
"description": "Analog ground for the bandgap reference."
},
{
"number": "64",
"name": "AVDDH",
"type": "power_in",
"description": "3.3V analog VDD."
}
],
"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 64-pin E-LQFP (10mm x 10mm) is the package the KSZ9021RL is sold in (page 1 and page 4), so the ; The exposed pad is not a numbered lead. It is printed as 'E-PAD' in the datasheet table, so it is li; Pins 31, 45, 47 and 50 are not used in RGMII mode and the datasheet says to leave them as no connect",
"dropped thermal pad ['EP'] absent from footprint",
"1/64 pin names appear NOWHERE in the datasheet text: ['59:XO@p11']"
],
"pages_sent": 36,
"cost_usd": 0.1634,
"at": "2026-10-30T18:17:52"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/b6cab378e9d4b54c5ad5e02f473023f6.pdf",
"pages": 67,
"sha256": "6361a105df1c9bc1",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 64,
"described": 64,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ksz9021rl.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12,
12,
1.5
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "b0c827bc5c05552175d28affe44a5bd2ab45c9c36efff6ff07a74cc449b13db4",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ksz9021rl-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12,
12,
1.5
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "d3efc786dbaa86ec19644c0029ac26eb3fcc753667ba75f93aa7b091795dfb5b",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "LQFP-64(10x10)",
"Category": "Logic ICs",
"Pins": "64"
},
"appearance": {
"housing": {
"quote": "• Priority 6: 10Base-T, half-duplex This is known as parallel detection, and allows the KSZ9021RL/RN to establish a link by listening for a fixed signal protocol in the absence of auto-negotiation ad",
"page": 27,
"doc": "ds.pdf",
"material": "abs"
},
"version": 1,
"datasheet_sha256": "6361a105df1c9bc120fbbd97bdd8adeeb2aaad9c22c6c3b4773f0a49d549c1fa"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "6361a105df1c9bc120fbbd97bdd8adeeb2aaad9c22c6c3b4773f0a49d549c1fa",
"rows": [
{
"name": "Supply Voltage (DVDDL, AVDDL, AVDDL_PLL)",
"symbol": "DVDDL, AVDDL, AVDDL_PLL",
"kind": "recommended_operating",
"unit": "V",
"min": 1.14,
"typ": null,
"max": 1.26,
"conditions": "",
"source_page": 50,
"source": "datasheet"
},
{
"name": "Supply Voltage (AVDDH)",
"symbol": "AVDDH",
"kind": "recommended_operating",
"unit": "V",
"min": 3.135,
"typ": null,
"max": 3.465,
"conditions": "",
"source_page": 50,
"source": "datasheet"
},
{
"name": "Supply Voltage (DVDDH @ 3.3V)",
"symbol": "DVDDH",
"kind": "recommended_operating",
"unit": "V",
"min": 3.135,
"typ": null,
"max": 3.465,
"conditions": "",
"source_page": 50,
"source": "datasheet"
},
{
"name": "Supply Voltage (DVDDH @ 2.5V)",
"symbol": "DVDDH",
"kind": "recommended_operating",
"unit": "V",
"min": 2.375,
"typ": null,
"max": 2.625,
"conditions": "",
"source_page": 50,
"source": "datasheet"
},
{
"name": "Ambient Temperature (TA Commercial: KSZ9021RL/RN)",
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"unit": "°C",
"min": 0,
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"max": 70,
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"source": "datasheet"
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{
"name": "Supply Voltage (DVDDL, AVDDL, AVDDL_PLL)",
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"min": -0.5,
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"max": 1.8,
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"source": "datasheet"
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{
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"symbol": "AVDDH",
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{
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"symbol": "DVDDH",
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{
"name": "Input Voltage (all inputs)",
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},
{
"name": "Storage Temperature (Ts)",
"symbol": "Ts",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 50,
"source": "datasheet"
},
{
"name": "Input High Voltage (TTL Inputs)",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
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