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STM32F401CEU6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM32F401CEU6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-48(7x7)
STM32F401CEU6 from STMicroelectronics, in a UFQFPN-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBAT | power_in | Battery supply voltage input, 1.7 V to 3.6 V, for RTC and backup power functions. |
| 2 | PC13 | bidirectional | General-purpose I/O port C bit 13, 5V tolerant with 3 mA maximum current output for RTC functions. |
| 3 | PC14-OSC32_IN | bidirectional | General-purpose I/O port C bit 14, 5V tolerant, configurable as 32 kHz oscillator input (OSC32_IN). |
| 4 | PC15-OSC32_OUT | bidirectional | General-purpose I/O port C bit 15, 5V tolerant, configurable as 32 kHz oscillator output (OSC32_OUT). |
| 5 | PH0-OSC_IN | bidirectional | General-purpose I/O port H bit 0, 5V tolerant, configurable as 4-26 MHz crystal oscillator input (OSC_IN). |
| 6 | PH1-OSC_OUT | bidirectional | General-purpose I/O port H bit 1, 5V tolerant, configurable as 4-26 MHz crystal oscillator output (OSC_OUT). |
| 7 | NRST | bidirectional | Reset input pin with embedded weak pull-up resistor (100 kΩ typical), active low logic level. |
| 8 | VSSA/VREF- | power_in | Analog ground and negative reference voltage pin for ADC, voltage range -0.3 V to VDDA. |
| 9 | VDDA/VREF+ | power_in | Analog supply and positive reference voltage pin for ADC, 1.7 V to 3.6 V input range. |
| 10 | PA0 | bidirectional | General-purpose I/O port A bit 0 with 5V tolerance, supports ADC1_IN0, USART2_CTS, and wake-up (WKUP) alternate functions. |
| 11 | PA1 | bidirectional | General-purpose I/O port A bit 1 with 5V tolerance, supports ADC1_IN1 and USART2_RTS alternate functions. |
| 12 | PA2 | bidirectional | General-purpose I/O port A bit 2 with 5V tolerance, supports ADC1_IN2 and USART2_TX alternate functions. |
| 13 | PA3 | bidirectional | General-purpose I/O port A bit 3 with 5V tolerance, supports ADC1_IN3 and USART2_RX alternate functions. |
| 14 | PA4 | bidirectional | General-purpose I/O port A bit 4 with 5V tolerance, supports ADC1_IN4, SPI1_NSS, and USART2_CK alternate functions. |
| 15 | PA5 | bidirectional | General-purpose I/O port A bit 5 with 5V tolerance, supports ADC1_IN5 and SPI1_SCK alternate functions. |
| 16 | PA6 | bidirectional | General-purpose I/O port A bit 6 with 5V tolerance, supports ADC1_IN6, SPI1_MISO, and TIM1_BKIN alternate functions. |
| 17 | PA7 | bidirectional | General-purpose I/O port A bit 7 with 5V tolerance, supports ADC1_IN7, SPI1_MOSI, and TIM1_CH1N alternate functions. |
| 18 | PB0 | bidirectional | General-purpose I/O port B bit 0 with 5V tolerance, supports ADC1_IN8 and TIM1_CH2N alternate functions. |
| 19 | PB1 | bidirectional | General-purpose I/O port B bit 1 with 5V tolerance, supports ADC1_IN9 and TIM1_CH3N alternate functions. |
| 20 | PB2 | bidirectional | General-purpose I/O port B bit 2 with 5V tolerance, supports BOOT1 alternate function for boot mode selection. |
| 21 | PB10 | bidirectional | General-purpose I/O port B bit 10 with 5V tolerance, supports I2C2_SCL, SPI2_SCK/I2S2_CK, and TIM2_CH3 functions. |
| 22 | VCAP1 | power_in | Internal regulator output capacitor supply pin requiring 100 nF external capacitor for core voltage regulation. |
| 23 | VSS | power_in | Ground pin connection to device reference. |
| 24 | VDD | power_in | Digital supply voltage input, 1.7 V to 3.6 V. |
| 25 | PB12 | bidirectional | General-purpose I/O port B bit 12 with 5V tolerance, supports I2C2_SMBA, SPI2_NSS/I2S2_WS, and TIM1_BKIN functions. |
| 26 | PB13 | bidirectional | General-purpose I/O port B bit 13 with 5V tolerance, supports SPI2_SCK/I2S2_CK and TIM1_CH1N alternate functions. |
| 27 | PB14 | bidirectional | General-purpose I/O port B bit 14 with 5V tolerance, supports SPI2_MISO, I2S2ext_SD, and TIM1_CH2N functions. |
| 28 | PB15 | bidirectional | General-purpose I/O port B bit 15 with 5V tolerance, supports SPI2_MOSI/I2S2_SD and RTC_REFIN alternate functions. |
| 29 | PA8 | bidirectional | General-purpose I/O port A bit 8 with 5V tolerance, supports I2C3_SCL, USART1_CK, TIM1_CH1, and MCO_1 alternate functions. |
| 30 | PA9 | bidirectional | General-purpose I/O port A bit 9 with 5V tolerance, supports I2C3_SMBA, USART1_TX, TIM1_CH2, and OTG_FS_VBUS functions. |
| 31 | PA10 | bidirectional | General-purpose I/O port A bit 10 with 5V tolerance, supports USART1_RX, TIM1_CH3, and OTG_FS_ID alternate functions. |
| 32 | PA11 | bidirectional | General-purpose I/O port A bit 11 with 5V tolerance, supports USART1_CTS, TIM1_CH4, and OTG_FS_DM alternate functions. |
| 33 | PA12 | bidirectional | General-purpose I/O port A bit 12 with 5V tolerance, supports USART1_RTS, TIM1_ETR, and OTG_FS_DP alternate functions. |
| 34 | PA13 | bidirectional | General-purpose I/O port A bit 13 configurable as JTMS-SWDIO for serial wire debug (SWD) and JTAG test mode select interface. |
| 35 | VSS | power_in | Ground pin connection to device reference. |
| 36 | VDD | power_in | Digital supply voltage input, 1.7 V to 3.6 V. |
| 37 | PA14 | bidirectional | General-purpose I/O port A bit 14 configurable as JTCK-SWCLK for debug clock and serial wire clock interface. |
| 38 | PA15 | bidirectional | General-purpose I/O port A bit 15 configurable as JTDI for JTAG test data input with SPI and timer alternate functions. |
| 39 | PB3 | bidirectional | General-purpose I/O port B bit 3 configurable as JTDO-SWO for JTAG test data output and serial wire output with SPI and I2C functions. |
| 40 | PB4 | bidirectional | General-purpose I/O port B bit 4 configurable as NJTRST for JTAG reset with SPI, I2C, and timer alternate functions. |
| 41 | PB5 | bidirectional | General-purpose I/O port B bit 5 with 5V tolerance, supports SPI1_MOSI, SPI3_MOSI/I2S3_SD, and I2C1_SMBA functions. |
| 42 | PB6 | bidirectional | General-purpose I/O port B bit 6 with 5V tolerance, supports I2C1_SCL, USART1_TX, and TIM4_CH1 alternate functions. |
| 43 | PB7 | bidirectional | General-purpose I/O port B bit 7 with 5V tolerance, supports I2C1_SDA, USART1_RX, and TIM4_CH2 alternate functions. |
| 44 | BOOT0 | input | Boot select input pin for choosing between main flash memory and system bootloader execution at device reset. |
| 45 | PB8 | bidirectional | General-purpose I/O port B bit 8 with 5V tolerance, supports I2C1_SCL, TIM4_CH3, TIM10_CH1, and SDIO_D4 functions. |
| 46 | PB9 | bidirectional | General-purpose I/O port B bit 9 with 5V tolerance, supports I2C1_SDA, SPI2_NSS/I2S2_WS, TIM4_CH4, and SDIO_D5 functions. |
| 47 | VSS | power_in | Ground pin connection to device reference. |
| 48 | VDD | power_in | Digital supply voltage input, 1.7 V to 3.6 V. |
| 49 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UFQFPN-48(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 49 |
CAD (KiCad official)
- Symbol:
STM32F401CEU6 - Footprint:
Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm - 3D model: UFQFPN-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
stm32f401ceu6-etched.step/stm32f401ceu6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32f401ceu6.step/stm32f401ceu6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (135 pp, sha256
7daad2163948dcbe, retrieved 2026-10-06, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).