component
AT89LS52-16AU
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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"title": "AT89LS52-16AU",
"brief": "Microchip Tech Pre-ordered MCUs, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"component": {
"mpn": "AT89LS52-16AU",
"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/14894384f8733e840cd5cd8a3aaba614.pdf",
"parts": {
"symbol": "at89ls52-16au.kicad_sym",
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"model_3d_step": "at89ls52-16au-etched.step",
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"lbr": "at89ls52-16au.lbr"
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"distributor_links": {
"lcsc": "C618939",
"digikey": "AT89LS52-16AU-ND",
"mouser": "556-A89LS52-16AU"
},
"distributor_check": {
"checked_at": "2026-10-31T09:25:39Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "AT89LS52-16AU-ND",
"status": "found",
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},
"pins": [
{
"number": "1",
"name": "P1.5",
"type": "bidirectional",
"description": "Port 1 bit 5 with internal pull-up; alternate function MOSI for In-System Programming."
},
{
"number": "2",
"name": "P1.6",
"type": "bidirectional",
"description": "Port 1 bit 6 with internal pull-up; alternate function MISO for In-System Programming."
},
{
"number": "3",
"name": "P1.7",
"type": "bidirectional",
"description": "Port 1 bit 7 with internal pull-up; alternate function SCK for In-System Programming."
},
{
"number": "4",
"name": "RST",
"type": "input",
"description": "Reset input; a high for two machine cycles while the oscillator is running resets the device, and the pin drives high for 98 oscillator periods after Watchdog timeout."
},
{
"number": "5",
"name": "P3.0",
"type": "bidirectional",
"description": "Port 3 bit 0 with internal pull-up; alternate function RXD (serial input port)."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "7",
"name": "P3.1",
"type": "bidirectional",
"description": "Port 3 bit 1 with internal pull-up; alternate function TXD (serial output port)."
},
{
"number": "8",
"name": "P3.2",
"type": "bidirectional",
"description": "Port 3 bit 2 with internal pull-up; alternate function INT0 (external interrupt 0)."
},
{
"number": "9",
"name": "P3.3",
"type": "bidirectional",
"description": "Port 3 bit 3 with internal pull-up; alternate function INT1 (external interrupt 1)."
},
{
"number": "10",
"name": "P3.4",
"type": "bidirectional",
"description": "Port 3 bit 4 with internal pull-up; alternate function T0 (timer 0 external input)."
},
{
"number": "11",
"name": "P3.5",
"type": "bidirectional",
"description": "Port 3 bit 5 with internal pull-up; alternate function T1 (timer 1 external input)."
},
{
"number": "12",
"name": "P3.6",
"type": "bidirectional",
"description": "Port 3 bit 6 with internal pull-up; alternate function WR (external data memory write strobe)."
},
{
"number": "13",
"name": "P3.7",
"type": "bidirectional",
"description": "Port 3 bit 7 with internal pull-up; alternate function RD (external data memory read strobe)."
},
{
"number": "14",
"name": "XTAL2",
"type": "output",
"description": "Oscillator amplifier output (crystal connection)."
},
{
"number": "15",
"name": "XTAL1",
"type": "input",
"description": "Oscillator amplifier and internal clock circuit input (crystal connection)."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "17",
"name": "GND",
"type": "power_in",
"description": "Ground (second GND pin on the TQFP package)."
},
{
"number": "18",
"name": "P2.0",
"type": "bidirectional",
"description": "Port 2 bit 0 with internal pull-up; emits address line A8 for external memory."
},
{
"number": "19",
"name": "P2.1",
"type": "bidirectional",
"description": "Port 2 bit 1 with internal pull-up; emits address line A9 for external memory."
},
{
"number": "20",
"name": "P2.2",
"type": "bidirectional",
"description": "Port 2 bit 2 with internal pull-up; emits address line A10 for external memory."
},
{
"number": "21",
"name": "P2.3",
"type": "bidirectional",
"description": "Port 2 bit 3 with internal pull-up; emits address line A11 for external memory."
},
{
"number": "22",
"name": "P2.4",
"type": "bidirectional",
"description": "Port 2 bit 4 with internal pull-up; emits address line A12 for external memory."
},
{
"number": "23",
"name": "P2.5",
"type": "bidirectional",
"description": "Port 2 bit 5 with internal pull-up; emits address line A13 for external memory."
},
{
"number": "24",
"name": "P2.6",
"type": "bidirectional",
"description": "Port 2 bit 6 with internal pull-up; emits address line A14 for external memory."
},
{
"number": "25",
"name": "P2.7",
"type": "bidirectional",
"description": "Port 2 bit 7 with internal pull-up; emits address line A15 for external memory."
},
{
"number": "26",
"name": "PSEN",
"type": "output",
"description": "Program Store Enable, the read strobe to external program memory."
},
{
"number": "27",
"name": "ALE/PROG",
"type": "output",
"description": "Address Latch Enable output pulse (1/6 oscillator frequency) latching the low address byte for external memory, and program pulse input (PROG) during Flash programming."
},
{
"number": "28",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "29",
"name": "EA/VPP",
"type": "input",
"description": "External Access enable / programming voltage input (VPP) for Flash programming."
},
{
"number": "30",
"name": "P0.7",
"type": "bidirectional",
"description": "Port 0 bit 7, open-drain bidirectional I/O; multiplexed address/data AD7 for external memory."
},
{
"number": "31",
"name": "P0.6",
"type": "bidirectional",
"description": "Port 0 bit 6, open-drain bidirectional I/O; multiplexed address/data AD6 for external memory."
},
{
"number": "32",
"name": "P0.5",
"type": "bidirectional",
"description": "Port 0 bit 5, open-drain bidirectional I/O; multiplexed address/data AD5 for external memory."
},
{
"number": "33",
"name": "P0.4",
"type": "bidirectional",
"description": "Port 0 bit 4, open-drain bidirectional I/O; multiplexed address/data AD4 for external memory."
},
{
"number": "34",
"name": "P0.3",
"type": "bidirectional",
"description": "Port 0 bit 3, open-drain bidirectional I/O; multiplexed address/data AD3 for external memory."
},
{
"number": "35",
"name": "P0.2",
"type": "bidirectional",
"description": "Port 0 bit 2, open-drain bidirectional I/O; multiplexed address/data AD2 for external memory."
},
{
"number": "36",
"name": "P0.1",
"type": "bidirectional",
"description": "Port 0 bit 1, open-drain bidirectional I/O; multiplexed address/data AD1 for external memory."
},
{
"number": "37",
"name": "P0.0",
"type": "bidirectional",
"description": "Port 0 bit 0, open-drain bidirectional I/O; multiplexed address/data AD0 for external memory."
},
{
"number": "38",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage; device operating range is 2.7 V to 4.0 V."
},
{
"number": "39",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "40",
"name": "P1.0",
"type": "bidirectional",
"description": "Port 1 bit 0 with internal pull-up; alternate function T2 (Timer/Counter 2 external count input), clock-out."
},
{
"number": "41",
"name": "P1.1",
"type": "bidirectional",
"description": "Port 1 bit 1 with internal pull-up; alternate function T2EX (Timer/Counter 2 capture/reload trigger and direction control)."
},
{
"number": "42",
"name": "P1.2",
"type": "bidirectional",
"description": "Port 1 bit 2 with internal pull-up."
},
{
"number": "43",
"name": "P1.3",
"type": "bidirectional",
"description": "Port 1 bit 3 with internal pull-up."
},
{
"number": "44",
"name": "P1.4",
"type": "bidirectional",
"description": "Port 1 bit 4 with internal pull-up."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
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"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The TQFP pin-number-to-name mapping was inferred from the order of the extracted figure text, becaus; Pin types for XTAL1, XTAL2, EA/VPP and ALE/PROG are inferred from their described functions. The dat",
"4/44 pins cited to the wrong page (name found elsewhere): ['13:P3.7@p5', '15:XTAL1@p2', '26:PSEN@p5', '27:ALE/PROG@p5']",
"1/44 pin names appear NOWHERE in the datasheet text: ['14:XTAL2@p2']"
],
"pages_sent": 9,
"cost_usd": 0.1412,
"at": "2026-10-31T09:25:17"
},
"datasheet": {
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"pages": 39,
"sha256": "e828a7b72fa7d152",
"source_tier": "mfr"
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"pins": {
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"described": 44,
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"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "TQFP-44(10x10)",
"Category": "Embedded Processors & Controllers",
"Pins": "44"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "e828a7b72fa7d15212bc61aea4b2cabb4e1bb962f0eacc9200e5edcd92139852",
"rows": [
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"name": "Input Low Voltage (Except EA)",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
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"conditions": "0.2 VCC-0.3 V as printed",
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{
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{
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{
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"min": null,
"typ": null,
"max": -150,
"conditions": "VIN = 2V, VCC = 5V ± 10%",
"source_page": 30,
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{
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"min": -10,
"typ": null,
"max": 10,
"conditions": "0.45 < VIN < VCC",
"source_page": 30,
"source": "datasheet"
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{
"name": "Reset Pulldown Resistor",
"symbol": "RRST",
"kind": "electrical",
"unit": "KΩ",
"min": 50,
"typ": null,
"max": 300,
"conditions": "",
"source_page": 30,
"source": "datasheet"
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{
"name": "Pin Capacitance",
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"kind": "electrical",
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"min": null,
"typ": null,
"max": 10,
"conditions": "Test Freq. = 1 MHz, TA = 25°C",
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{
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{
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{
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{
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{
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"conditions": "16 MHz oscillator",
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{
"name": "ALE Low to Valid Instruction In",
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