component
CH32F203CBT6
Public Made by Adomby adom
WCH Jiangsu Qin Heng Microcontrollers (MCU/MPU/SOC), 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": "ch32f203cbt6",
"title": "CH32F203CBT6",
"brief": "WCH Jiangsu Qin Heng Microcontrollers (MCU/MPU/SOC), 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",
"embedded processors & controllers",
"ch32f203cbt6",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "CH32F203CBT6",
"manufacturer": "WCH Jiangsu Qin Heng",
"package": "LQFP-48(7x7)",
"pin_count": 48,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8567438510215741440",
"parts": {
"symbol": "ch32f203cbt6.kicad_sym",
"footprint": "ch32f203cbt6.kicad_mod",
"model_3d": "ch32f203cbt6-hero.glb",
"model_3d_plain": "ch32f203cbt6-etched.glb",
"model_3d_step": "ch32f203cbt6-etched.step",
"model_3d_step_plain": "ch32f203cbt6.step",
"lbr": "ch32f203cbt6.lbr"
},
"distributor_links": {
"lcsc": "C5155973"
},
"distributor_check": {
"checked_at": "2026-10-19T06:15:46Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "VBAT",
"type": "power_in",
"description": "Backup supply of 1.8-3.6V that independently powers the RTC, the external low-frequency oscillator and the backup registers when VDD is turned off."
},
{
"number": "2",
"name": "PC13/TAMPER-RTC",
"type": "bidirectional",
"description": "GPIO powered through the power switch, which can only absorb 3mA; when used as an output only one of PC13-PC15 may be an output at a time, only in 2MHz mode, with a maximum load of 30pF and no current-source use."
},
{
"number": "3",
"name": "PC14/OSC32_IN",
"type": "bidirectional",
"description": "GPIO powered through the backup power switch (3mA limit shared with PC13/PC15, 2MHz output mode, 30pF max load) that doubles as the 32.768 kHz low-speed oscillator input OSC32_IN."
},
{
"number": "4",
"name": "PC15/OSC32_OUT",
"type": "bidirectional",
"description": "GPIO powered through the backup power switch (3mA limit shared with PC13/PC14, 2MHz output mode, 30pF max load) that doubles as the low-speed oscillator output OSC32_OUT."
},
{
"number": "5",
"name": "OSC_IN/PD0",
"type": "input",
"description": "High-speed external oscillator input (3-25MHz) that is OSC_IN by default after reset and can be reconfigured as PD0 by software."
},
{
"number": "6",
"name": "OSC_OUT/PD1",
"type": "output",
"description": "High-speed external oscillator output that is OSC_OUT by default after reset and can be reconfigured as PD1 by software."
},
{
"number": "7",
"name": "NRST",
"type": "input",
"description": "External reset input on NRST; an external reset on this pin also exits Stop and Standby modes."
},
{
"number": "8",
"name": "VSSA",
"type": "power_in",
"description": "Analog ground for the analog circuitry (ADC, DAC, temperature sensor, PLL and high-frequency RC oscillator)."
},
{
"number": "9",
"name": "VDDA",
"type": "power_in",
"description": "Analog supply of 2.4-3.6V for the high-frequency RC oscillator, ADC, temperature sensor, DAC and PLL, which must equal VI/O and be at least 2.4V when the ADC is used."
},
{
"number": "10",
"name": "PA0/WKUP/ADC0",
"type": "bidirectional",
"description": "GPIO with WKUP wake-up function (rising edge on WKUP wakes from Standby), ADC_IN0 analog input, and timer and USART2_CTS alternate functions."
},
{
"number": "11",
"name": "PA1/ADC1",
"type": "bidirectional",
"description": "GPIO with ADC_IN1 analog input and alternate functions including USART2_RTS, TIM5_CH2 and TIM2_CH2."
},
{
"number": "12",
"name": "PA2/ADC2",
"type": "bidirectional",
"description": "GPIO with ADC_IN2 analog input and alternate functions including USART2_TX, TIM5_CH3, TIM2_CH3 and TIM9_CH1."
},
{
"number": "13",
"name": "PA3/ADC3",
"type": "bidirectional",
"description": "GPIO with ADC_IN3 analog input and alternate functions including USART2_RX, TIM5_CH4, TIM2_CH4 and TIM9_CH2."
},
{
"number": "14",
"name": "PA4/ADC4/DAC0",
"type": "bidirectional",
"description": "GPIO with ADC_IN4 analog input and DAC_OUT1 analog output, plus alternate functions including SPI1_NSS, USART2_CK, SPI3_NSS and I2S3_WS."
},
{
"number": "15",
"name": "PA5/ADC5/DAC1",
"type": "bidirectional",
"description": "GPIO with ADC_IN5 analog input and DAC_OUT2 analog output, plus alternate functions including SPI1_SCK and DVP_VSYNC."
},
{
"number": "16",
"name": "PA6/ADC6",
"type": "bidirectional",
"description": "GPIO with ADC_IN6 analog input, plus alternate functions including SPI1_MISO, TIM8_BKIN, TIM3_CH1 and DVP_PCLK."
},
{
"number": "17",
"name": "PA7/ADC7",
"type": "bidirectional",
"description": "GPIO with ADC_IN7 analog input, plus alternate functions including SPI1_MOSI, TIM8_CH1N, TIM3_CH2 and ETH_MII_RX_DV."
},
{
"number": "18",
"name": "PB0/ADC8",
"type": "bidirectional",
"description": "GPIO with ADC_IN8 analog input, plus alternate functions including TIM3_CH3, TIM8_CH2N, OPA1_CH1P and ETH_MII_RXD2."
},
{
"number": "19",
"name": "PB1/ADC9",
"type": "bidirectional",
"description": "GPIO with ADC_IN9 analog input, plus alternate functions including TIM3_CH4, TIM8_CH3N, OPA4_CH0N and ETH_MII_RXD3."
},
{
"number": "20",
"name": "PB2/BOOT1",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO that also serves as the BOOT1 boot-mode input, and is pulled down internally when used as BOOT1 on devices without this pin."
},
{
"number": "21",
"name": "PB10",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with I2C2_SCL, USART3_TX, OPA2_CH0N, ETH_MII_RX_ER and TIM2_CH3/TIM10_BKIN alternate functions."
},
{
"number": "22",
"name": "PB11",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with I2C2_SDA, USART3_RX, OPA1_CH0N, ETH_MII_TX_EN and TIM2_CH4/TIM10_ETR alternate functions."
},
{
"number": "23",
"name": "VSS_1",
"type": "power_in",
"description": "Ground pin for the I/O domain."
},
{
"number": "24",
"name": "VDD_I/O_1",
"type": "power_in",
"description": "I/O supply of 2.4-3.6V that powers most I/O pins and sets their output high level; it must not be higher than VDD during operation."
},
{
"number": "25",
"name": "PB12",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI2_NSS, I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN, OPA4_CH0P, CAN2_RX and ETH_MII_TXD0 alternate functions."
},
{
"number": "26",
"name": "PB13",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI2_SCK, I2S2_CK, USART3_CTS, TIM1_CH1N, OPA3_CH0P, CAN2_TX and ETH_MII_TXD1 alternate functions."
},
{
"number": "27",
"name": "PB14",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI2_MISO, TIM1_CH2N, USART3_RTS and OPA2_CH0P alternate functions."
},
{
"number": "28",
"name": "PB15",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI2_MOSI/I2S2_SD, TIM1_CH3N/OPA1_CH0P and USART1_TX_2 alternate functions."
},
{
"number": "29",
"name": "PA8",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with USART1_CK, TIM1_CH1 and MCO (microcontroller clock output) alternate functions."
},
{
"number": "30",
"name": "PA9",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with USART1_TX, TIM1_CH2, OTG_FS_VBUS and DVP_D0 alternate functions."
},
{
"number": "31",
"name": "PA10",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with USART1_RX, TIM1_CH3, OTG_FS_ID and DVP_D1 alternate functions."
},
{
"number": "32",
"name": "PA11/USB1DM",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with USB full-speed D- (USBDM) and OTG_FS_DM, plus USART1_CTS, CAN1_RX and TIM1_CH4 alternate functions."
},
{
"number": "33",
"name": "PA12/USB1DP",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with USB full-speed D+ (USBDP) and OTG_FS_DP, plus USART1_RTS, CAN1_TX and TIM1_ETR alternate functions."
},
{
"number": "34",
"name": "PA13/SWDIO",
"type": "bidirectional",
"description": "5V-tolerant (FT) serial-wire debug data pin SWDIO, enabled by default after power-on or reset, with TIM10_CH2N and TIM8_CH1N_1 alternate functions."
},
{
"number": "35",
"name": "VSS_2",
"type": "power_in",
"description": "Ground pin for the digital supply domain."
},
{
"number": "36",
"name": "VDD_2",
"type": "power_in",
"description": "System digital supply of 2.4-3.6V that powers some I/O pins and the internal voltage regulator."
},
{
"number": "37",
"name": "PA14/SWCLK",
"type": "bidirectional",
"description": "5V-tolerant (FT) serial-wire debug clock SWCLK, enabled by default after power-on or reset, with TIM10_CH3N, TIM8_CH2N_1 and UART8_TX_1 alternate functions."
},
{
"number": "38",
"name": "PA15",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI3_NSS, I2S3_WS, TIM2_CH1_ETR, SPI1_NSS, TIM8_CH3N_1 and UART8_RX_1 alternate functions."
},
{
"number": "39",
"name": "PB3",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI3_SCK, I2S3_CK, TRACESWO, TIM2_CH2_1 and SPI1_SCK alternate functions."
},
{
"number": "40",
"name": "PB4",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with SPI3_MISO, TIM3_CH1_2, SPI1_MISO, UART5_TX_1 and TIM10_CH2_1 alternate functions."
},
{
"number": "41",
"name": "PB5",
"type": "bidirectional",
"description": "GPIO with I2C1_SMBA, SPI3_MOSI, I2S3_SD, ETH_MII_PPS_OUT, SPI1_MOSI and CAN2_RX alternate functions; the table gives no FT (5V-tolerant) rating for this pin."
},
{
"number": "42",
"name": "PB6",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with I2C1_SCL, TIM4_CH1, USBFS_DM/USBHS_DM, DVP_D5, USART1_TX_1 and CAN2_TX alternate functions."
},
{
"number": "43",
"name": "PB7",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with I2C1_SDA, FSMC_NADV, TIM4_CH2, USBFS_DP/USBHS_DP, USART1_RX_1 and TIM8_CH2_1 alternate functions."
},
{
"number": "44",
"name": "BOOT0",
"type": "input",
"description": "Boot-mode select input that is sampled at startup together with BOOT1 (PB2) to choose boot from program flash, system memory or internal SRAM."
},
{
"number": "45",
"name": "PB8",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with TIM4_CH3, SDIO_D4, TIM10_CH1, DVP_D6, I2C1_SCL, CAN1_RX and UART6_TX_1 alternate functions."
},
{
"number": "46",
"name": "PB9",
"type": "bidirectional",
"description": "5V-tolerant (FT) GPIO with TIM4_CH4, SDIO_D5, TIM10_CH2, DVP_D7, I2C1_SDA, CAN1_TX and UART6_RX_1 alternate functions."
},
{
"number": "47",
"name": "VSS_3",
"type": "power_in",
"description": "Ground pin for the I/O domain."
},
{
"number": "48",
"name": "VDD_I/O_3",
"type": "power_in",
"description": "I/O supply of 2.4-3.6V that powers most I/O pins and sets their output high level; it must not be higher than VDD during operation."
}
],
"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 LQFP48 pinout is not presented as a titled diagram. I took pin numbers from the LQFP48 column of; Naming inconsistency: Table 3-1 names pins 24 and 48 VDD_I/O_1 and VDD_I/O_3, while the page 21 diag; Note 4 on OSC_IN/OSC_OUT (PD0/PD1 reconfiguration) explicitly refers to the LQFP64M package. The LQF",
"3/48 pins cited to the wrong page (name found elsewhere): ['24:VDD_I/O_1@p11', '36:VDD_2@p11', '48:VDD_I/O_3@p11']"
],
"pages_sent": 24,
"cost_usd": 0.1693,
"at": "2026-10-19T06:15:24"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8567438510215741440",
"pages": 69,
"sha256": "4b7f09894a062d50",
"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": "ch32f203cbt6.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": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ch32f203cbt6-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": "ae4ab1dab8586a7ca36ad1e9cf317a4e3935184cd83479062d4b6ea3e6e23727",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "WCH Jiangsu Qin Heng",
"Package": "LQFP-48(7x7)",
"Category": "Embedded Processors & Controllers",
"Pins": "48"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "4b7f09894a062d505c9ba53586443e35b6f566ac54a35bbad55acd807ca43656",
"rows": [
{
"name": "Ambient temperature during operation",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Ambient temperature during storage",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "External main supply voltage (including VDDA and VDD)",
"symbol": "VDD-VSS",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 4,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "I/O domain supply voltage",
"symbol": "VIO-VSS",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 4,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Input voltage on the FT (5V tolerance) pin",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Variations between different main power supply pins",
"symbol": "|△VDD_x|",
"kind": "absolute_maximum",
"unit": "mV",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Variations between different I/O power supply pins",
"symbol": "|△VIO_x|",
"kind": "absolute_maximum",
"unit": "mV",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Variations between different ground pins",
"symbol": "|△VSS_x|",
"kind": "absolute_maximum",
"unit": "mV",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 36,
"source": "datasheet"
},
{
"name": "Total current into VDD/VDDA/VI/O power lines (supply current)",
"symbol": "IVDD",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 36,
"source": "datasheet"
},
{
"name": "Total current out of VSS ground lines (outflow current)",
"symbol": "IVss",
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