component
NUC123LD4AE0
Public Made by Adomby adom
Nuvoton Tech Microcontroller Units (MCUs/MPUs/SOCs), LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "nuc123ld4ae0",
"title": "NUC123LD4AE0",
"brief": "Nuvoton Tech Microcontroller Units (MCUs/MPUs/SOCs), LQFP-48(7x7). 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",
"single chip microcomputer-microcontroller",
"nuc123ld4ae0",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "NUC123LD4AE0",
"manufacturer": "Nuvoton Tech",
"package": "LQFP-48(7x7)",
"pin_count": 48,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/82b297f7a63d68e4dc5dc43b8878f216.pdf",
"parts": {
"symbol": "nuc123ld4ae0.kicad_sym",
"footprint": "nuc123ld4ae0.kicad_mod",
"model_3d": "nuc123ld4ae0-hero.glb",
"model_3d_plain": "nuc123ld4ae0-etched.glb",
"model_3d_step": "nuc123ld4ae0-etched.step",
"model_3d_step_plain": "nuc123ld4ae0.step",
"lbr": "nuc123ld4ae0.lbr"
},
"distributor_links": {
"lcsc": "C2640124",
"digikey": "NUC123LD4AE0-ND",
"mouser": "503-NUC123LD4AE0"
},
"distributor_check": {
"checked_at": "2026-10-23T12:28:04Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "NUC123LD4AE0-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "503-NUC123LD4AE0",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PVSS",
"type": "power_in",
"description": "PLL ground."
},
{
"number": "2",
"name": "PB.8",
"type": "bidirectional",
"description": "Digital GPIO pin, or TM0 Timer0 event counter input / toggle output."
},
{
"number": "3",
"name": "PB.14",
"type": "bidirectional",
"description": "Digital GPIO pin, or INT0 external interrupt 0 input."
},
{
"number": "4",
"name": "PA.11",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_CLK, SPI2_MOSI0 or I2C1_SCL."
},
{
"number": "5",
"name": "PA.10",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_MISO0, SPI2_MISO0 or I2C1_SDA."
},
{
"number": "6",
"name": "PB.4",
"type": "bidirectional",
"description": "Digital GPIO pin, or UART1_RXD input, SPI2_SS0 or SPI1_SS1."
},
{
"number": "7",
"name": "PB.5",
"type": "bidirectional",
"description": "Digital GPIO pin, or UART1_TXD output or SPI2_CLK."
},
{
"number": "8",
"name": "PB.6",
"type": "bidirectional",
"description": "Digital GPIO pin, or UART1_nRTS output or SPI2_MOSI0."
},
{
"number": "9",
"name": "PB.7",
"type": "bidirectional",
"description": "Digital GPIO pin, or UART1_nCTS input or SPI2_MISO0."
},
{
"number": "10",
"name": "LDO_CAP",
"type": "power_out",
"description": "LDO output pin."
},
{
"number": "11",
"name": "VDD",
"type": "power_in",
"description": "Power supply for I/O ports and LDO source for internal PLL and digital function; voltage range 2.5V ~ 5V."
},
{
"number": "12",
"name": "VSS",
"type": "power_in",
"description": "Ground."
},
{
"number": "13",
"name": "USB_VBUS",
"type": "power_in",
"description": "USB power supply from USB host or hub."
},
{
"number": "14",
"name": "USB_VDD33_CAP",
"type": "power_out",
"description": "USB internal power regulator output 3.3V decoupling pin."
},
{
"number": "15",
"name": "USB_D-",
"type": "bidirectional",
"description": "USB differential signal D-."
},
{
"number": "16",
"name": "USB_D+",
"type": "bidirectional",
"description": "USB differential signal D+."
},
{
"number": "17",
"name": "PC.5",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_MOSI1 or UART0_TXD output."
},
{
"number": "18",
"name": "PC.4",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_MISO1 or UART0_RXD input."
},
{
"number": "19",
"name": "PC.3",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_MOSI0 or I2S_DO data output."
},
{
"number": "20",
"name": "PC.2",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_MISO0 or I2S_DI data input."
},
{
"number": "21",
"name": "PC.1",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_CLK or I2S_BCLK bit clock."
},
{
"number": "22",
"name": "PC.0",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_SS0 or I2S_LRCLK left/right channel clock."
},
{
"number": "23",
"name": "PB.10",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI0_SS1 or TM2 Timer2 event counter input / toggle output."
},
{
"number": "24",
"name": "PB.9",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_SS1, TM1 Timer1 event counter input / toggle output, or PWM1 (NUC123xxxAEx only)."
},
{
"number": "25",
"name": "PC.13",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_MOSI1, PWM3 or CLKO frequency divider output."
},
{
"number": "26",
"name": "PC.12",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_MISO1, PWM2 or I2S_MCLK master clock output."
},
{
"number": "27",
"name": "PC.11",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_MOSI0."
},
{
"number": "28",
"name": "PC.10",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_MISO0."
},
{
"number": "29",
"name": "PC.9",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_CLK."
},
{
"number": "30",
"name": "PC.8",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI1_SS0 or PWM0 (NUC123xxxAEx only)."
},
{
"number": "31",
"name": "PA.15",
"type": "bidirectional",
"description": "Digital GPIO pin, or PWM3, I2S_MCLK master clock output or CLKO frequency divider output."
},
{
"number": "32",
"name": "PA.14",
"type": "bidirectional",
"description": "Digital GPIO pin, or PWM2 output / capture input."
},
{
"number": "33",
"name": "PA.13",
"type": "bidirectional",
"description": "Digital GPIO pin, or PWM1 output / capture input."
},
{
"number": "34",
"name": "PA.12",
"type": "bidirectional",
"description": "Digital GPIO pin, or PWM0 output / capture input."
},
{
"number": "35",
"name": "ICE_DAT",
"type": "bidirectional",
"description": "Serial wired debugger data pin; a 100 kΩ pull-up resistor is recommended."
},
{
"number": "36",
"name": "ICE_CLK",
"type": "input",
"description": "Serial wired debugger clock input pin; a 100 kΩ pull-up resistor is recommended."
},
{
"number": "37",
"name": "AVDD",
"type": "power_in",
"description": "Power supply for internal analog circuit."
},
{
"number": "38",
"name": "PD.0",
"type": "bidirectional",
"description": "Digital GPIO pin, or ADC0 analog input or SPI2_SS0."
},
{
"number": "39",
"name": "PD.1",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI2_CLK, SPI0_SS1 or ADC1 analog input."
},
{
"number": "40",
"name": "PD.2",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI2_MISO0, SPI0_MISO1 or ADC2 analog input."
},
{
"number": "41",
"name": "PD.3",
"type": "bidirectional",
"description": "Digital GPIO pin, or SPI2_MOSI0, SPI0_MOSI1 or ADC3 analog input."
},
{
"number": "42",
"name": "PD.4",
"type": "bidirectional",
"description": "Digital GPIO pin, or ADC4 analog input or SPI2_MISO1."
},
{
"number": "43",
"name": "PD.5",
"type": "bidirectional",
"description": "Digital GPIO pin, or ADC5 analog input or SPI2_MOSI1."
},
{
"number": "44",
"name": "PF.0",
"type": "bidirectional",
"description": "Digital GPIO pin, or XT1_OUT external 4~24 MHz high speed crystal output."
},
{
"number": "45",
"name": "PF.1",
"type": "bidirectional",
"description": "Digital GPIO pin, or XT1_IN external 4~24 MHz high speed crystal input."
},
{
"number": "46",
"name": "nRESET",
"type": "input",
"description": "External reset input, low active, resets chip to initial state, with internal pull-up; a 10 kΩ pull-up resistor and 10 μF capacitor are recommended."
},
{
"number": "47",
"name": "PF.2",
"type": "bidirectional",
"description": "Digital GPIO pin, or ADC6 analog input, I2C0_SDA or PS2_DAT."
},
{
"number": "48",
"name": "PF.3",
"type": "bidirectional",
"description": "Digital GPIO pin, or ADC7 analog input, I2C0_SCL or PS2_CLK."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pin numbers 5 (PA.10) is marked with an asterisk in the table; the footnote meaning is not in the pr; The datasheet shows only a pin diagram for NUC123LxxANx (page 17); the AEx LQFP48 diagram page was n; LDO_CAP and USB_VDD33_CAP are listed as power/regulator output pins; the type power_out is an interp"
],
"pages_sent": 16,
"cost_usd": 0.2058,
"at": "2026-10-23T12:27:39"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/82b297f7a63d68e4dc5dc43b8878f216.pdf",
"pages": 100,
"sha256": "4155f3be31484ab1",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 48,
"described": 48,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "nuc123ld4ae0.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
9,
9,
1.5
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "9dea352d93177c2904afd7d7b68ea8855ce1ab691f69f8b3e13655600514b6bf",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "nuc123ld4ae0-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
9,
9,
1.5
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "1b8301dc398ba138c37a1c415f604268c537e1e76269c8092f125bb0041b2c59",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Nuvoton Tech",
"Package": "LQFP-48(7x7)",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "48"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "4155f3be31484ab19933712c954bb12bd75aeb1967db7d0ff4200ad8aed0f666",
"rows": [
{
"name": "DC Power Supply",
"symbol": "VDD-VSS",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Oscillator Frequency",
"symbol": "1/tCLCL",
"kind": "absolute_maximum",
"unit": "MHz",
"min": 4,
"typ": null,
"max": 24,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Operating Temperature",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 105,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "TST",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current into VDD",
"symbol": "IDD",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 120,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current out of VSS",
"symbol": "ISS",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 120,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current sunk by a I/O pin",
"symbol": "IIO",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 35,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current sourced by a I/O pin",
"symbol": "IIO",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 35,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current sunk by total I/O pins",
"symbol": "IIO",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Maximum Current sourced by total I/O pins",
"symbol": "IIO",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 82,
"source": "datasheet"
},
{
"name": "Operation voltage",
"symbol": "VDD",
"kind": "recommended_operating",
"unit": "V",
"min": 2.5,
"typ": null,
"max": 5.5,
"conditions": "VDD = 2.5V ~ 5.5V up to 72 MHz",
"source_page": 83,
"source": "datasheet"
},
{
"name": "VDD rise rate to ensure internal operation correctly",
"symbol": "VRISE",
"kind": "recommended_operating",
"unit": "V/ms",
"min": 0.05,
"typ": null,
"max": null,
"conditions": "",
"source_page": 83,
"source": "datasheet"
},
{
"name": "Power ground",
"symbol": "VSS/AVSS",
"kind": "recommended_operating",
"unit": "V",
"min": -0.3,
"typ": null,
"max": null,
"conditions": "",
"source_page": 83,
"source": "datasheet"
},
{
"name": "LDO output voltage",
"symbol": "VLDO",
"kind": "electrical",
"unit": "V",
"min": 1.62,
"typ": 1.8,
"max": 1.98,
"conditions": "VDD > 2.5V",
"source_page": 83,
"source": "datasheet"
},
{
"name": "Analog operating voltage",
"symbol": "AVDD",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": null,
"conditions": "max is VDD",
"source_page": 83,
"source": "datasheet"
},
{
"name": "Source Current quasi-bidirectional",
"symbol": "ISR11",
"kind": "electrical",
"unit": "μA",
"min": -300,
"typ": -370,
"max": -450,
"conditions": "VDD = 4.5V, VS = 2.4V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Source Current quasi-bidirectional",
"symbol": "ISR12",
"kind": "electrical",
"unit": "μA",
"min": -50,
"typ": -70,
"max": -90,
"conditions": "VDD = 2.7V, VS = 2.2V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Source Current push-pull",
"symbol": "ISR21",
"kind": "electrical",
"unit": "mA",
"min": -24,
"typ": -28,
"max": -32,
"conditions": "VDD = 4.5V, VS = 2.4V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Source Current push-pull",
"symbol": "ISR22",
"kind": "electrical",
"unit": "mA",
"min": -4,
"typ": -6,
"max": -8,
"conditions": "VDD = 2.7V, VS = 2.2V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Sink Current quasi-bidirectional and push-pull",
"symbol": "ISK1",
"kind": "electrical",
"unit": "mA",
"min": 10,
"typ": 16,
"max": 20,
"conditions": "VDD = 4.5V, VS = 0.45V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Sink Current quasi-bidirectional and push-pull",
"symbol": "ISK1",
"kind": "electrical",
"unit": "mA",
"min": 7,
"typ": 10,
"max": 13,
"conditions": "VDD = 2.7V, VS = 0.45V",
"source_page": 86,
"source": "datasheet"
},
{
"name": "Brown-out voltage",
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