component
AT89LP51ED2-20AU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "at89lp51ed2-20au",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Pre-ordered MCUs, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"embedded processors & controllers",
"at89lp51ed2-20au",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
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"files": [
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"README.md",
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"at89lp51ed2-20au.step",
"at89lp51ed2-20au.lbr",
"docs/hero.png",
"docs/at89lp51ed2-20au-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
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"at89lp51ed2-20au-hero.overlay.json",
"at89lp51ed2-20au-etched.glb"
],
"component": {
"mpn": "AT89LP51ED2-20AU",
"manufacturer": "Microchip Tech",
"package": "TQFP-44(10x10)",
"pin_count": 44,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d4ed5de346a5f158df0a0e80958f5b3c.pdf",
"parts": {
"symbol": "at89lp51ed2-20au.kicad_sym",
"footprint": "at89lp51ed2-20au.kicad_mod",
"model_3d": "at89lp51ed2-20au-hero.glb",
"model_3d_plain": "at89lp51ed2-20au-etched.glb",
"model_3d_step": "at89lp51ed2-20au-etched.step",
"model_3d_step_plain": "at89lp51ed2-20au.step",
"lbr": "at89lp51ed2-20au.lbr"
},
"distributor_links": {
"lcsc": "C618931",
"digikey": "AT89LP51ED2-20AU-ND",
"mouser": "556-AT89LP51ED2-20AU"
},
"distributor_check": {
"checked_at": "2026-10-31T03:44:40Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "AT89LP51ED2-20AU-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-AT89LP51ED2-20AU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "P1.5",
"type": "bidirectional",
"description": "Port 1 bit 5 configurable I/O, with MISO (SPI master-in/slave-out), MOSI in remap mode (input during ISP), and CEX2 (PCA module 2 capture/compare)."
},
{
"number": "2",
"name": "P1.6",
"type": "bidirectional",
"description": "Port 1 bit 6 configurable I/O, with SCK (SPI clock), MISO in remap mode (output during ISP), and CEX3 (PCA module 3 capture/compare)."
},
{
"number": "3",
"name": "P1.7",
"type": "bidirectional",
"description": "Port 1 bit 7 configurable I/O, with MOSI (SPI master-out/slave-in), SCK in remap mode (input during ISP), and CEX4 (PCA module 4 capture/compare)."
},
{
"number": "4",
"name": "RST",
"type": "bidirectional",
"description": "External reset input with polarity set by the POL pin, can output a pulse on watchdog reset or POR, and doubles as DCL serial debug clock input when OCD is enabled."
},
{
"number": "5",
"name": "P3.0",
"type": "bidirectional",
"description": "Port 3 bit 0 configurable I/O, also RXD serial port receiver input."
},
{
"number": "6",
"name": "P4.1",
"type": "bidirectional",
"description": "Port 4 bit 1 configurable I/O, also SDA TWI bidirectional serial data line."
},
{
"number": "7",
"name": "P3.1",
"type": "bidirectional",
"description": "Port 3 bit 1 configurable I/O, also TXD serial port transmitter output."
},
{
"number": "8",
"name": "P3.2",
"type": "bidirectional",
"description": "Port 3 bit 2 configurable I/O, also INT0 external interrupt 0 or Timer 0 gate input."
},
{
"number": "9",
"name": "P3.3",
"type": "bidirectional",
"description": "Port 3 bit 3 configurable I/O, also INT1 external interrupt 1 or Timer 1 gate input."
},
{
"number": "10",
"name": "P3.4",
"type": "bidirectional",
"description": "Port 3 bit 4 configurable I/O, also T0 Timer/Counter 0 external input or output."
},
{
"number": "11",
"name": "P3.5",
"type": "bidirectional",
"description": "Port 3 bit 5 configurable I/O, also T1 Timer/Counter 1 external input or output."
},
{
"number": "12",
"name": "P3.6",
"type": "bidirectional",
"description": "Port 3 bit 6 configurable I/O, also WR external memory write strobe (active-low)."
},
{
"number": "13",
"name": "P3.7",
"type": "bidirectional",
"description": "Port 3 bit 7 configurable I/O, also RD external memory read strobe (active-low)."
},
{
"number": "14",
"name": "P4.7",
"type": "bidirectional",
"description": "Port 4 bit 7 configurable I/O, also XTAL2A oscillator A amplifier output; usable as a port pin if internal RC oscillator or external clock is selected."
},
{
"number": "15",
"name": "P4.6",
"type": "bidirectional",
"description": "Port 4 bit 6 configurable I/O, also XTAL1A oscillator A amplifier input and clock generation input; usable as a port pin if internal RC oscillator is selected."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "17",
"name": "P4.3",
"type": "bidirectional",
"description": "Port 4 bit 3 configurable I/O, also DDA bidirectional debug data line when OCD is enabled."
},
{
"number": "18",
"name": "P2.0",
"type": "bidirectional",
"description": "Port 2 bit 0 configurable I/O, also A8 external memory address bit 8."
},
{
"number": "19",
"name": "P2.1",
"type": "bidirectional",
"description": "Port 2 bit 1 configurable I/O, also A9 external memory address bit 9."
},
{
"number": "20",
"name": "P2.2",
"type": "bidirectional",
"description": "Port 2 bit 2 configurable I/O, with DA- DAC negative differential output and A10 external memory address bit 10."
},
{
"number": "21",
"name": "P2.3",
"type": "bidirectional",
"description": "Port 2 bit 3 configurable I/O, with DA+ DAC positive differential output and A11 external memory address bit 11."
},
{
"number": "22",
"name": "P2.4",
"type": "bidirectional",
"description": "Port 2 bit 4 configurable I/O, with AIN0 analog comparator input 0 and A12 external memory address bit 12."
},
{
"number": "23",
"name": "P2.5",
"type": "bidirectional",
"description": "Port 2 bit 5 configurable I/O, with AIN1 analog comparator input 1 and A13 external memory address bit 13."
},
{
"number": "24",
"name": "P2.6",
"type": "bidirectional",
"description": "Port 2 bit 6 configurable I/O, with AIN2 analog comparator input 2 and A14 external memory address bit 14."
},
{
"number": "25",
"name": "P2.7",
"type": "bidirectional",
"description": "Port 2 bit 7 configurable I/O, with AIN3 analog comparator input 3 and A15 external memory address bit 15."
},
{
"number": "26",
"name": "P4.5",
"type": "bidirectional",
"description": "Port 4 bit 5 configurable I/O, also PSEN external memory program store enable (active-low)."
},
{
"number": "27",
"name": "P4.4",
"type": "bidirectional",
"description": "Port 4 bit 4 configurable I/O, also ALE external memory address latch enable."
},
{
"number": "28",
"name": "P4.0",
"type": "bidirectional",
"description": "Port 4 bit 0 configurable I/O, also SCL TWI serial clock (output in master mode, input in slave mode)."
},
{
"number": "29",
"name": "POL",
"type": "input",
"description": "Reset polarity select: high makes RST active high with pull-down, low makes RST active low with pull-up."
},
{
"number": "30",
"name": "P0.7",
"type": "bidirectional",
"description": "Port 0 bit 7 configurable I/O, also AD7 external memory address/data bit 7."
},
{
"number": "31",
"name": "P0.6",
"type": "bidirectional",
"description": "Port 0 bit 6 configurable I/O, with AD6 external memory address/data bit 6 and ADC6 analog input."
},
{
"number": "32",
"name": "P0.5",
"type": "bidirectional",
"description": "Port 0 bit 5 configurable I/O, with AD5 external memory address/data bit 5 and ADC5 analog input."
},
{
"number": "33",
"name": "P0.4",
"type": "bidirectional",
"description": "Port 0 bit 4 configurable I/O, with AD4 external memory address/data bit 4 and ADC4 analog input."
},
{
"number": "34",
"name": "P0.3",
"type": "bidirectional",
"description": "Port 0 bit 3 configurable I/O, with AD3 external memory address/data bit 3 and ADC3 analog input."
},
{
"number": "35",
"name": "P0.2",
"type": "bidirectional",
"description": "Port 0 bit 2 configurable I/O, with AD2 external memory address/data bit 2 and ADC2 analog input."
},
{
"number": "36",
"name": "P0.1",
"type": "bidirectional",
"description": "Port 0 bit 1 configurable I/O, with AD1 external memory address/data bit 1 and ADC1 analog input."
},
{
"number": "37",
"name": "P0.0",
"type": "bidirectional",
"description": "Port 0 bit 0 configurable I/O, with AD0 external memory address/data bit 0 and ADC0 analog input."
},
{
"number": "38",
"name": "VDD",
"type": "power_in",
"description": "Supply voltage, 2.4V to 5.5V operating range."
},
{
"number": "39",
"name": "P4.2",
"type": "bidirectional",
"description": "Port 4 bit 2 configurable I/O, also XTAL2B low-frequency oscillator B amplifier output (AT89LP51ID2 only)."
},
{
"number": "40",
"name": "P1.0",
"type": "bidirectional",
"description": "Port 1 bit 0 configurable I/O, with T2 Timer 2 external input or clock output and XTAL1B low-frequency oscillator B input."
},
{
"number": "41",
"name": "P1.1",
"type": "bidirectional",
"description": "Port 1 bit 1 configurable I/O, with T2EX Timer 2 external capture/reload input and SS SPI slave-select."
},
{
"number": "42",
"name": "P1.2",
"type": "bidirectional",
"description": "Port 1 bit 2 configurable I/O (ECI per pinout figure)."
},
{
"number": "43",
"name": "P1.3",
"type": "bidirectional",
"description": "Port 1 bit 3 configurable I/O, also CEX0 PCA module 0 capture/compare external I/O."
},
{
"number": "44",
"name": "P1.4",
"type": "bidirectional",
"description": "Port 1 bit 4 configurable I/O, with SS SPI slave-select in remap mode (input for ISP) and CEX1 PCA module 1 capture/compare I/O."
}
],
"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: Package mapping: the ordering table lists AT89LP51ED2-20AU as 44A (TQFP), and the 44A drawing is 10x; Pin 3 has no entry in the VQFP column of Table 1-1 or the pin diagram in the extracted text, so it i; Table 1-1 has transcription errors that were corrected from the pin diagram. Pin 20 symbol is printe"
],
"pages_sent": 15,
"cost_usd": 0.1278,
"at": "2026-10-31T03:44:27"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/d4ed5de346a5f158df0a0e80958f5b3c.pdf",
"pages": 26,
"sha256": "3c04a18eb05a6e48",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 44,
"described": 44,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "at89lp51ed2-20au.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12.0,
12.0,
1.1
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "61ecec1147f835d2c9d165c450b1c8d53e65b038f6ca1dac3066a2dfb1bbbb85",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "at89lp51ed2-20au-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12.0,
12.0,
1.1
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "54b3f999ebbec4c47fa901348c369b61840a08f6bd2f0484307363db56520015",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}