component
KSZ8041NL-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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"title": "KSZ8041NL-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",
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"component": {
"mpn": "KSZ8041NL-TR",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Interface ICs",
"subcategory": "Ethernet ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/51fba74e2e284844b995d85c4ba47f16.pdf",
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{
"number": "1",
"name": "GND",
"type": "power_in",
"description": "Ground pin."
},
{
"number": "2",
"name": "VDDPLL_1.8",
"type": "power_in",
"description": "1.8V analog VDD for the PLL, decoupled with 10uF and 0.1uF capacitors to ground."
},
{
"number": "3",
"name": "VDDA_3.3",
"type": "power_in",
"description": "3.3V analog VDD, connected to the board's 3.3V supply through a ferrite bead."
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{
"number": "4",
"name": "RX-",
"type": "bidirectional",
"description": "Physical receive or transmit signal, negative differential."
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{
"number": "5",
"name": "RX+",
"type": "bidirectional",
"description": "Physical receive or transmit signal, positive differential."
},
{
"number": "6",
"name": "TX-",
"type": "bidirectional",
"description": "Physical transmit or receive signal, negative differential."
},
{
"number": "7",
"name": "TX+",
"type": "bidirectional",
"description": "Physical transmit or receive signal, positive differential."
},
{
"number": "8",
"name": "XO",
"type": "output",
"description": "Crystal feedback output, used only in MII mode with a 25 MHz crystal and left unconnected for an oscillator, external clock, or RMII mode."
},
{
"number": "9",
"name": "XI / REFCLK",
"type": "input",
"description": "Crystal, oscillator, or external clock input: 25MHz +/-50ppm in MII mode, or 50MHz +/-50ppm (oscillator or external clock only) in RMII mode."
},
{
"number": "10",
"name": "REXT",
"type": "bidirectional",
"description": "Sets the physical transmit output current; pull down to ground with a 6.49KΩ resistor."
},
{
"number": "11",
"name": "MDIO",
"type": "bidirectional",
"description": "Management Interface (MII) data I/O, requiring an external 4.7KΩ pull-up resistor."
},
{
"number": "12",
"name": "MDC",
"type": "input",
"description": "Management Interface (MII) clock input, synchronous to the MDIO data interface."
},
{
"number": "13",
"name": "RXD3 / PHYAD0",
"type": "bidirectional",
"description": "MII mode receive data output bit 3, and the pull-up/pull-down value is latched as PHYADDR[0] at power-up/reset."
},
{
"number": "14",
"name": "RXD2 / PHYAD1",
"type": "bidirectional",
"description": "MII mode receive data output bit 2, and the pull-up/pull-down value is latched as PHYADDR[1] at power-up/reset."
},
{
"number": "15",
"name": "RXD1 / RXD[1] / PHYAD2",
"type": "bidirectional",
"description": "MII mode receive data output bit 1 or RMII mode receive data output bit 1, and the pull-up/pull-down value is latched as PHYADDR[2] at power-up/reset."
},
{
"number": "16",
"name": "RXD0 / RXD[0] / DUPLEX",
"type": "bidirectional",
"description": "MII mode receive data output bit 0 or RMII mode receive data output bit 0, and the strap is latched as DUPLEX (register 0h bit 8) at power-up/reset, with pull-up defaulting to full duplex."
},
{
"number": "17",
"name": "VDDIO_3.3",
"type": "power_in",
"description": "3.3V digital VDD, connected to the board's 3.3V supply."
},
{
"number": "18",
"name": "RXDV / CRSDV / CONFIG2",
"type": "bidirectional",
"description": "Receive data valid output in MII mode or carrier sense/receive data valid output in RMII mode, with the CONFIG2 strap latched at power-up/reset."
},
{
"number": "19",
"name": "RXC",
"type": "output",
"description": "MII mode receive clock output."
},
{
"number": "20",
"name": "RXER / RX_ER / ISO",
"type": "bidirectional",
"description": "Receive error output in MII or RMII mode, with the ISO strap latched into register 0h bit 10 at power-up/reset (pull-up enables isolate)."
},
{
"number": "21",
"name": "INTRP",
"type": "output",
"description": "Programmable interrupt output with internal pull-up, active low by default and selectable active high via register 1Fh bit 9."
},
{
"number": "22",
"name": "TXC",
"type": "output",
"description": "MII mode transmit clock output."
},
{
"number": "23",
"name": "TXEN / TX_EN",
"type": "input",
"description": "Transmit enable input in MII mode (TXEN) or RMII mode (TX_EN)."
},
{
"number": "24",
"name": "TXD0 / TXD[0]",
"type": "input",
"description": "MII mode transmit data input bit 0 or RMII mode transmit data input bit 0."
},
{
"number": "25",
"name": "TXD1 / TXD[1]",
"type": "input",
"description": "MII mode transmit data input bit 1 or RMII mode transmit data input bit 1."
},
{
"number": "26",
"name": "TXD2",
"type": "input",
"description": "MII mode transmit data input bit 2, synchronous to TXCLK."
},
{
"number": "27",
"name": "TXD3",
"type": "input",
"description": "MII mode transmit data input bit 3, synchronous to TXCLK."
},
{
"number": "28",
"name": "COL / CONFIG0",
"type": "bidirectional",
"description": "MII mode collision detect output, with the CONFIG0 strap latched at power-up/reset."
},
{
"number": "29",
"name": "CRS / CONFIG1",
"type": "bidirectional",
"description": "MII mode carrier sense output, with the CONFIG1 strap latched at power-up/reset."
},
{
"number": "30",
"name": "LED0 / NWAYEN",
"type": "bidirectional",
"description": "Programmable LED0 output (register 1Eh bits [15:14]), with the strap latched as auto-negotiation enable (register 0h bit 12) at power-up/reset."
},
{
"number": "31",
"name": "LED1 / SPEED",
"type": "bidirectional",
"description": "Programmable LED1 output (register 1Eh bits [15:14]), with the strap latched as speed select (register 0h bit 13) at power-up/reset, where pull-up selects 100Mbps."
},
{
"number": "32",
"name": "RST#",
"type": "input",
"description": "Chip reset input, active low."
},
{
"number": "33",
"name": "EP",
"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-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 MPN suffix '-TR' (tape and reel) is not listed in the datasheet. The ordering information only l; The datasheet calls the package a 32-pin lead-free MLF (QFN per JEDEC) with 5mm x 5mm body. The hint; The exposed paddle is printed as 'PADDLE GND' with no pin number, so it is listed with number 'PADDL",
"exposed pad 33 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"1/33 pins cited to the wrong page (name found elsewhere): ['8:XO@p9']"
],
"pages_sent": 23,
"cost_usd": 0.0967,
"at": "2026-11-05T10:34:08"
},
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"sha256": "ffd72edb4b1abd53",
"source_tier": "lcsc"
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"described": 33,
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"Package": "QFN-32-EP(5x5)",
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"name": "Supply Voltage (VDDIO_3.3, VDDA_3.3)",
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{
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"conditions": "Ethernet cable disconnected (reg. 1F.10 = 1)",
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{
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"conditions": "100Ω termination across differential output",
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{
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