component
STC12H1K16-36I-DIP20
Public Made by Adomby adom
STC Micro Microcontrollers (MCU/MPU/SOC), DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "stc12h1k16-36i-dip20",
"title": "STC12H1K16-36I-DIP20",
"brief": "STC Micro Microcontrollers (MCU/MPU/SOC), DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"stc12h1k16-36i-dip20",
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"component": {
"mpn": "STC12H1K16-36I-DIP20",
"manufacturer": "STC Micro",
"package": "DIP-20",
"pin_count": 20,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603394806823870464",
"parts": {
"symbol": "stc12h1k16-36i-dip20.kicad_sym",
"footprint": "stc12h1k16-36i-dip20.kicad_mod",
"model_3d": "stc12h1k16-36i-dip20-hero.glb",
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"lbr": "stc12h1k16-36i-dip20.lbr"
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"distributor_links": {
"lcsc": "C22472725"
},
"distributor_check": {
"checked_at": "2026-10-16T10:33:16Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "P5.4/RST/MCLKO",
"type": "bidirectional",
"description": "Standard bidirectional I/O P5.4 that can be configured as the active-low reset input RST or as the MCLKO master-clock output; when used as a plain I/O its internal 4K pull-up stays on for about 6.5 ms after power-up."
},
{
"number": "2",
"name": "P3.0/RxD/INT4",
"type": "bidirectional",
"description": "Standard I/O P3.0 serving as UART1 receive (RxD) and external interrupt INT4; P3.0, P3.1 and P3.2 must not all be low at power-on unless USB software download is intended, otherwise the chip enters USB download mode."
},
{
"number": "3",
"name": "P3.1/TxD",
"type": "bidirectional",
"description": "Standard I/O P3.1 serving as UART1 transmit (TxD); it is the ISP/emulation download pin and is weakly pulled up (quasi-bidirectional) after power-on."
},
{
"number": "4",
"name": "P5.6 (RxD2_2/MCLKO_2/XTALO)",
"type": "bidirectional",
"description": "Standard I/O P5.6 that can be used as UART2 receive (RxD2_2), master-clock output (MCLKO_2) or external crystal output XTALO."
},
{
"number": "5",
"name": "P5.7 (TxD2_2/XTALI)",
"type": "bidirectional",
"description": "Standard I/O P5.7 that can be used as UART2 transmit (TxD2_2) or the external crystal/external clock input XTALI."
},
{
"number": "6",
"name": "P3.2 (INT0/SCLK_4/SCL_4)",
"type": "bidirectional",
"description": "Standard I/O P3.2 serving as external interrupt 0 (INT0), SPI clock (SCLK_4) or I2C clock (SCL_4); it is one of the USB-download boot-select pins together with P3.0 and P3.1."
},
{
"number": "7",
"name": "P3.3 (INT1/MISO_4/SDA_4)",
"type": "bidirectional",
"description": "Standard I/O P3.3 serving as external interrupt 1 (INT1), SPI master-in/slave-out (MISO_4) or I2C data (SDA_4)."
},
{
"number": "8",
"name": "P3.4 (T0/T1CLKO/MOSI_4/ECI)",
"type": "bidirectional",
"description": "Standard I/O P3.4 serving as Timer 0 external count input (T0), Timer 1 clock output (T1CLKO), SPI master-out/slave-in (MOSI_4), PCA external input (ECI) or PWM external trigger input (PWMETI)."
},
{
"number": "9",
"name": "P3.5/T1/T0CLKO/RxD_2/SS_4/PWM6/CCP1",
"type": "bidirectional",
"description": "Standard I/O P3.5 serving as Timer 1 external count input (T1), Timer 0 clock output (T0CLKO), UART1 receive alternate (RxD_2), SPI slave select (SS_4), PWM6 or PCA module 1 (CCP1)."
},
{
"number": "10",
"name": "Gnd/AGnd",
"type": "power_in",
"description": "Ground pin; the same pin serves as the ADC analog ground (AGnd), and the datasheet asks that the ADC analog ground be tied directly to the system ground with a short, thick trace."
},
{
"number": "11",
"name": "P3.7/ADC14/TxD_2/PWM5/CCP0",
"type": "bidirectional",
"description": "Standard I/O P3.7 that can be used as ADC input channel 14, UART1 transmit alternate (TxD_2), PWM5 or PCA module 0 (CCP0)."
},
{
"number": "12",
"name": "P1.0/ADC0/RxD2/T3CLKO/PWM1P",
"type": "bidirectional",
"description": "Standard I/O P1.0 that can be used as ADC input channel 0, UART2 receive (RxD2), Timer 3 clock output (T3CLKO) or PWM1 positive output/capture (PWM1P)."
},
{
"number": "13",
"name": "P1.1/ADC1/TxD2/T4CLKO/PWM1N",
"type": "bidirectional",
"description": "Standard I/O P1.1 that can be used as ADC input channel 1, UART2 transmit (TxD2), Timer 4 clock output (T4CLKO) or PWM1 negative output/capture (PWM1N)."
},
{
"number": "14",
"name": "P1.2/ADC2/T2/PWM2P",
"type": "bidirectional",
"description": "Standard I/O P1.2 that can be used as ADC input channel 2, Timer 2 external count input (T2) or PWM2 positive output/capture (PWM2P)."
},
{
"number": "15",
"name": "P1.3/ADC3/T2CLKO/PWM2N",
"type": "bidirectional",
"description": "Standard I/O P1.3 that can be used as ADC input channel 3, Timer 2 clock output (T2CLKO) or PWM2 negative output/capture (PWM2N)."
},
{
"number": "16",
"name": "P1.4/ADC4/SS/PWM3P",
"type": "bidirectional",
"description": "Standard I/O P1.4 that can be used as ADC input channel 4, SPI slave select (SS) or PWM3 positive output/capture (PWM3P)."
},
{
"number": "17",
"name": "P1.5/ADC5/MOSI/PWM3N",
"type": "bidirectional",
"description": "Standard I/O P1.5 that can be used as ADC input channel 5, SPI master-out/slave-in (MOSI) or PWM3 negative output/capture (PWM3N)."
},
{
"number": "18",
"name": "P1.6/ADC6/RxD_3/MISO/SDA/PWM4P",
"type": "bidirectional",
"description": "Standard I/O P1.6 that can be used as ADC input channel 6, UART1 receive alternate (RxD_3), SPI master-in/slave-out (MISO), I2C data (SDA) or PWM4 positive output/capture (PWM4P); it is also a wake-up source from power-down."
},
{
"number": "19",
"name": "P1.7/ADC7/TxD_3/SCLK/SCL/PWM4N",
"type": "bidirectional",
"description": "Standard I/O P1.7 that can be used as ADC input channel 7, UART1 transmit alternate (TxD_3), SPI clock (SCLK), I2C clock (SCL) or PWM4 negative output/capture (PWM4N)."
},
{
"number": "20",
"name": "Vcc/AVcc/ADC_VRef+",
"type": "power_in",
"description": "Supply pin for the MCU (working voltage 1.9V to 5.5V), which also powers the ADC (AVcc) and serves as the ADC external reference input ADC_VRef+, which must be connected to an external reference of 2.4 V to MCU-VCC and must not float."
}
],
"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 DIP-20 pinout is taken from the figure for the TSSOP20/SOP20/DIP20 variant on the STC12H1K08 dra; Pin numbers were read from the DIP20/TSSOP20 drawing; the extracted pin-function table columns are g; Pin 20 is shared by Vcc, AVcc and ADC_VRef+ and is typed as power_in; the ADC_VRef+ function is an i"
],
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"at": "2026-10-16T10:32:56"
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"pages": 1019,
"sha256": "77659dc2f42f051a",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
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"checked": "2026-10-16",
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"metadata": {
"specs": {
"Manufacturer": "STC Micro",
"Package": "DIP-20",
"Category": "Embedded Processors & Controllers",
"Pins": "20"
},
"appearance": {
"housing": {
"quote": "Accumulator contents and the contents of a sixteen-bit base register, which may be either the Data Pointer or the PC. In the latter case, the PC is incremented to the address of the following",
"page": 393,
"doc": "ds.pdf",
"material": "PC"
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"name": "Input low voltage (normal I/O), Schmitt trigger on",
"symbol": "VIL1",
"kind": "electrical",
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"typ": null,
"max": 0.99,
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"name": "Input low voltage (normal I/O), Schmitt trigger off",
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"source_page": 899,
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{
"name": "Input high voltage (normal I/O), Schmitt trigger on",
"symbol": "VIH1",
"kind": "electrical",
"unit": "V",
"min": 1.18,
"typ": null,
"max": null,
"conditions": "Schmitt trigger on; VSS=0V, VDD=3.3V, 25°C",
"source_page": 899,
"source": "datasheet"
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{
"name": "Input high voltage (normal I/O), Schmitt trigger off",
"symbol": "VIH1",
"kind": "electrical",
"unit": "V",
"min": 1.09,
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{
"name": "Input high voltage (reset pin)",
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"conditions": "VSS=0V, VDD=3.3V, 25°C",
"source_page": 899,
"source": "datasheet"
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{
"name": "Logic 0 input current",
"symbol": "IIL",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": null,
"max": 50,
"conditions": "Port voltage 0V; VSS=0V, VDD=3.3V, 25°C",
"source_page": 899,
"source": "datasheet"
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{
"name": "Logic 1 to 0 transition current",
"symbol": "ITL",
"kind": "electrical",
"unit": "uA",
"min": 100,
"typ": 270,
"max": 600,
"conditions": "Port voltage 2.0V; VSS=0V, VDD=3.3V, 25°C",
"source_page": 899,
"source": "datasheet"
},
{
"name": "I/O port pull-up resistance",
"symbol": "RPU",
"kind": "electrical",
"unit": "KΩ",
"min": 5.8,
"typ": 5.9,
"max": 6,
"conditions": "VSS=0V, VDD=3.3V, 25°C",
"source_page": 899,
"source": "datasheet"
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{
"name": "Storage temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 898,
"source": "datasheet"
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{
"name": "Operating temperature",
"symbol": "",
"kind": "recommended_operating",
"unit": "℃",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 898,
"source": "datasheet"
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{
"name": "Operating voltage",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 1.9,
"typ": null,
"max": 5.5,
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{
"name": "VDD to GND voltage",
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{
"name": "I/O port voltage to GND",
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"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
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"conditions": "Maximum printed as VDD+0.3 V (expression, not a number)",
"source_page": 898,
"source": "datasheet"
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}
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