component
LAN8720AI-CP
Public Made by Adomby adom
Microchip Tech Ethernet Transceivers, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"slug": "lan8720ai-cp",
"title": "LAN8720AI-CP",
"brief": "Microchip Tech Ethernet Transceivers, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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],
"component": {
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"manufacturer": "Microchip Tech",
"package": "QFN-24-EP(4x4)",
"pin_count": 25,
"category": "Interface",
"subcategory": "Ethernet Transceivers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893401127665664",
"parts": {
"symbol": "lan8720ai-cp.kicad_sym",
"footprint": "lan8720ai-cp.kicad_mod",
"model_3d": "lan8720ai-cp-hero.glb",
"model_3d_plain": "lan8720ai-cp-etched.glb",
"model_3d_step": "lan8720ai-cp-etched.step",
"model_3d_step_plain": "lan8720ai-cp.step",
"lbr": "lan8720ai-cp.lbr"
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"distributor_check": {
"checked_at": "2026-10-18T11:32:04Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
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"mouser": {
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},
"pins": [
{
"number": "1",
"name": "VDD2A",
"type": "power_in",
"description": "+3.3V analog port power to Channel 2 and the internal regulator."
},
{
"number": "2",
"name": "LED2/nINTSEL",
"type": "bidirectional",
"description": "Link speed LED output (O12) that is active at 100Mbps, also the nINTSEL strap (internal pull-up) that selects nINT (floated or high to VDD2A) or REFCLKO (low to VSS) on pin 14."
},
{
"number": "3",
"name": "LED1/REGOFF",
"type": "bidirectional",
"description": "Link activity LED output (O12) that is active on valid link and blinks on activity, also the REGOFF strap (internal pull-down) where pulling high to VDD2A disables the internal 1.2V regulator."
},
{
"number": "4",
"name": "XTAL2",
"type": "output",
"description": "External crystal output; leave unconnected when a single-ended clock oscillator drives XTAL1/CLKIN."
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{
"number": "5",
"name": "XTAL1/CLKIN",
"type": "input",
"description": "External crystal input or single-ended clock oscillator input (50MHz REF_CLK in REF_CLK In mode)."
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{
"number": "6",
"name": "VDDCR",
"type": "power_in",
"description": "+1.2V digital core power supplied by the on-chip regulator unless REGOFF disables it, with 1uF and 470pF decoupling capacitors in parallel to ground."
},
{
"number": "7",
"name": "RXD1/MODE1",
"type": "bidirectional",
"description": "Receive data bit 1 output (VO8) that doubles as the MODE1 configuration strap (internal pull-up) setting the default PHY mode."
},
{
"number": "8",
"name": "RXD0/MODE0",
"type": "bidirectional",
"description": "Receive data bit 0 output (VO8) that doubles as the MODE0 configuration strap (internal pull-up) setting the default PHY mode."
},
{
"number": "9",
"name": "VDDIO",
"type": "power_in",
"description": "+1.6V to +3.6V variable I/O power."
},
{
"number": "10",
"name": "RXER/PHYAD0",
"type": "bidirectional",
"description": "Receive error output (VO8) that doubles as the PHYAD0 strap (internal pull-down) setting the SMI address to 0 or 1."
},
{
"number": "11",
"name": "CRS_DV/MODE2",
"type": "bidirectional",
"description": "Carrier sense/receive data valid output (VO8) that doubles as the MODE2 configuration strap (internal pull-up) setting the default PHY mode."
},
{
"number": "12",
"name": "MDIO",
"type": "bidirectional",
"description": "Serial Management Interface data input/output (VIS/VOD8)."
},
{
"number": "13",
"name": "MDC",
"type": "input",
"description": "Serial Management Interface clock input (VIS)."
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{
"number": "14",
"name": "nINT/REFCLKO",
"type": "output",
"description": "Active-low open-drain interrupt output (VOD8, internal pull-up, add external pull-up to VDDIO) or optional 50MHz reference clock output (VO8), selected by the nINTSEL strap."
},
{
"number": "15",
"name": "nRST",
"type": "input",
"description": "Active-low system reset input (VIS, internal pull-up)."
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{
"number": "16",
"name": "TXEN",
"type": "input",
"description": "Transmit enable input (VIS, internal pull-down) indicating valid transmission data is present on TXD[1:0]."
},
{
"number": "17",
"name": "TXD0",
"type": "input",
"description": "Transmit data bit 0 input (VIS) from the MAC."
},
{
"number": "18",
"name": "TXD1",
"type": "input",
"description": "Transmit data bit 1 input (VIS) from the MAC."
},
{
"number": "19",
"name": "VDD1A",
"type": "power_in",
"description": "+3.3V analog port power to Channel 1."
},
{
"number": "20",
"name": "TXN",
"type": "bidirectional",
"description": "Ethernet transmit/receive negative channel 1 (analog bidirectional)."
},
{
"number": "21",
"name": "TXP",
"type": "bidirectional",
"description": "Ethernet transmit/receive positive channel 1 (analog bidirectional)."
},
{
"number": "22",
"name": "RXN",
"type": "bidirectional",
"description": "Ethernet transmit/receive negative channel 2 (analog bidirectional)."
},
{
"number": "23",
"name": "RXP",
"type": "bidirectional",
"description": "Ethernet transmit/receive positive channel 2 (analog bidirectional)."
},
{
"number": "24",
"name": "RBIAS",
"type": "passive",
"description": "Analog reference input requiring a 12.1k ohm (1%) resistor to ground, nominal 1.2V and about 1mW dissipation."
},
{
"number": "25",
"name": "VSS",
"type": "power_in",
"description": "Exposed pad common ground, which must be connected to the ground plane with a via array."
}
],
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"factory_chain": {
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"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 pad (VSS, ground) on the bottom of the package must be connected to ground, per Figure 2; These pins are multiplexed with configuration straps (nINTSEL, REGOFF, MODE[2:0], PHYAD0). Each is l; VDDCR is supplied by the internal regulator by default but becomes an external 1.2V input in regulat",
"exposed pad 25 added from the footprint",
"6/25 pins cited to the wrong page (name found elsewhere): ['4:XTAL2@p10', '13:MDC@p9', '16:TXEN@p7', '17:TXD0@p7']"
],
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"cost_usd": 0.1075,
"at": "2026-10-18T11:30:14"
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"sha256": "fe56a1de03873781",
"source_tier": "lcsc"
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"pins": {
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"refuses_to_fabricate": true
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"Package": "QFN-24-EP(4x4)",
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"name": "Analog Port Supply Voltage",
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"name": "Supply Voltage (VDDIO, VDD1A, VDD2A)",
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{
"name": "Positive voltage on signal pins, with respect to ground",
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"name": "Negative voltage on signal pins, with respect to ground",
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"conditions": "Note 5-3; does not apply to RBIAS",
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{
"name": "Positive voltage on XTAL1/CLKIN, with respect to ground",
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{
"name": "Positive voltage on XTAL2, with respect to ground",
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"min": null,
"typ": null,
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"source_page": 52,
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{
"name": "Storage Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
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{
"name": "IEC61000-4-2 Contact Discharge ESD Performance",
"symbol": "",
"kind": "absolute_maximum",
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"min": -8,
"typ": null,
"max": 8,
"conditions": "Note 5-5 (independent 3rd party test)",
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{
"name": "IEC61000-4-2 Air-Gap Discharge ESD Performance",
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{
"name": "Latch-up Performance",
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{
"name": "IIH Input Leakage",
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{
"name": "ICLK Type Buffer (XTAL1 Input) Low Input Level",
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"min": -0.3,
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{
"name": "ICLK Type Buffer (XTAL1 Input) High Input Level",
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"min": 0.9,
"typ": null,
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{
"name": "O12 Type Buffers Low Output Level",
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"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "IOL = 12mA",
"source_page": 55,
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{
"name": "VO8 Type Buffers Low Output Level",
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"min": null,
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"conditions": "IOL = 8mA",
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{
"name": "VOD8 Type Buffer Low Output Level",
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"min": null,
"typ": null,
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{
"name": "Peak Differential Output Voltage High",
"symbol": "VPPH",
"kind": "electrical",
"unit": "mVpk",
"min": 950,
"typ": null,
"max": 1050,
"conditions": "Note 5-12",
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"source": "datasheet"
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{
"name": "Peak Differential Output Voltage Low",
"symbol": "VPPL",
"kind": "electrical",
"unit": "mVpk",
"min": -950,
"typ": null,
"max": -1050,
"conditions": "Note 5-12 (min/max as printed)",
"source_page": 56,
"source": "datasheet"
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{
"name": "Signal Amplitude Symmetry",
"symbol": "VSS",
"kind": "electrical",
"unit": "%",
"min": 98,
"typ": null,
"max": 102,
"conditions": "Note 5-12",
"source_page": 56,
"source": "datasheet"
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{
"name": "Signal Rise and Fall Time",
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"min": 3,
"typ": null,
"max": 5,
"conditions": "Note 5-12",
"source_page": 56,
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{
"name": "Rise and Fall Symmetry",
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"unit": "nS",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "Note 5-12",
"source_page": 56,
"source": "datasheet"
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{
"name": "Duty Cycle Distortion",
"symbol": "DCD",
"kind": "electrical",
"unit": "%",
"min": 35,
"typ": 50,
"max": 65,
"conditions": "Note 5-13",
"source_page": 56,
"source": "datasheet"
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{
"name": "Overshoot and Undershoot",
"symbol": "VOS",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": null,
"max": 5,
"conditions": "",
"source_page": 56,
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{
"name": "Jitter (100BASE-TX)",
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"typ": null,
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"conditions": "Note 5-14",
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{
"name": "Transmitter Peak Differential Output Voltage (10BASE-T)",
"symbol": "VOUT",
"kind": "electrical",
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"min": 2.2,
"typ": 2.5,
"max": 2.8,
"conditions": "Note 5-15: measured at line side of transformer, line replaced by 100 ohm resistor",
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},
{
"name": "Receiver Differential Squelch Threshold (10BASE-T)",
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"typ": 420,
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{
"name": "Power supply turn on time",
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"min": null,
"typ": null,
"max": 50,
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{
"name": "Power supply turn off time",
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"min": null,
"typ": null,
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"source_page": 58,
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{
"name": "Total Current, REF_CLK IN mode, 100BASE-TX w/ traffic",
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"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 49,
"conditions": "Max row; Note 5-8 (VDDIO=1.8V & internal regulator disabled)",
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"source": "datasheet"
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{
"name": "Total Current, REF_CLK IN mode, 10BASE-T w/ traffic",
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"kind": "electrical",
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"typ": null,
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"conditions": "Max row; Note 5-8 (VDDIO=1.8V & internal regulator disabled)",
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"source": "datasheet"
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