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STM32F446RET6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). 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
markdownSTM32F446RET6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)
STM32F446RET6 from STMicroelectronics, in a LQFP-64(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBAT | power_in | Backup battery supply (1.65 V to 3.6 V) that powers the RTC, the 20x32-bit backup registers and the optional 4 KB backup SRAM when VDD is absent. |
| 2 | PC13 | bidirectional | 5V-tolerant (FT) general-purpose I/O port C pin 13, alternate function EVENTOUT, additional function RTC tamper input/wakeup pin TAMP_1/WKUP1. |
| 3 | PC14-OSC32_IN(PC14) | bidirectional | 5V-tolerant (FT) general-purpose I/O PC14, alternate function EVENTOUT, additional function 32.768 kHz RTC crystal oscillator input OSC32_IN. |
| 4 | PC15-OSC32_OUT(PC15) | bidirectional | 5V-tolerant (FT) general-purpose I/O PC15, alternate function EVENTOUT, additional function 32.768 kHz RTC crystal oscillator output OSC32_OUT. |
| 5 | PH0-OSC_IN(PH0) | bidirectional | 5V-tolerant (FT) general-purpose I/O PH0, alternate function EVENTOUT, additional function high-speed external oscillator input OSC_IN. |
| 6 | PH1-OSC_OUT(PH1) | bidirectional | 5V-tolerant (FT) general-purpose I/O PH1, alternate function EVENTOUT, additional function high-speed external oscillator output OSC_OUT. |
| 7 | NRST | bidirectional | Bidirectional reset pin with internal weak pull-up resistor; driving it low resets the device (see recommended NRST protection circuit). |
| 8 | PC0 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC0; alternate functions SAI1_MCLK_B, OTG_HS_ULPI_STP, FMC_SDNWE, EVENTOUT; additional function ADC123_IN10. |
| 9 | PC1 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC1; alternate functions SPI3_MOSI/I2S3_SD, SAI1_SD_A, SPI2_MOSI/I2S2_SD, EVENTOUT; additional function ADC123_IN11. |
| 10 | PC2 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC2; alternate functions SPI2_MISO, OTG_HS_ULPI_DIR, FMC_SDNE0, EVENTOUT; additional function ADC123_IN12. |
| 11 | PC3 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC3; alternate functions SPI2_MOSI/I2S2_SD, OTG_HS_ULPI_NXT, FMC_SDCKE0, EVENTOUT; additional function ADC123_IN13. |
| 12 | VSSA | power_in | Analog ground supply pin for the ADC, DAC and other analog peripherals. |
| 13 | VDDA | power_in | Analog power supply pin for the ADC, DAC and other analog peripherals, within the general operating supply range. |
| 14 | PA0-WKUP(PA0) | bidirectional | 5V-tolerant (FT) general-purpose I/O PA0; alternate functions TIM2_CH1/TIM2_ETR, TIM5_CH1, TIM8_ETR, USART2_CTS, UART4_TX, EVENTOUT; additional functions ADC123_IN0 and WKUP0/TAMP_2. |
| 15 | PA1 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA1; alternate functions TIM2_CH2, TIM5_CH2, USART2_RTS, UART4_RX, QUADSPI_BK1_IO3, SAI2_MCLK_B, EVENTOUT; additional function ADC123_IN1. |
| 16 | PA2 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA2; alternate functions TIM2_CH3, TIM5_CH3, TIM9_CH1, USART2_TX, SAI2_SCK_B, EVENTOUT; additional function ADC123_IN2. |
| 17 | PA3 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA3; alternate functions TIM2_CH4, TIM5_CH4, TIM9_CH2, SAI1_FS_A, USART2_RX, OTG_HS_ULPI_D0, EVENTOUT; additional function ADC123_IN3. |
| 18 | VSS | power_in | Digital ground supply pin. |
| 19 | VDD | power_in | Digital power supply pin within the 1.7 V to 3.6 V application supply range. |
| 20 | PA4 | bidirectional | General-purpose I/O PA4 (TTa/ADC-connected structure); alternate functions SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, USART2_CK, OTG_HS_SOF, DCMI_HSYNC, EVENTOUT; additional functions ADC12_IN4 and DAC_OUT1. |
| 21 | PA5 | bidirectional | General-purpose I/O PA5 (TTa/ADC-connected structure); alternate functions TIM2_CH1/TIM2_ETR, TIM8_CH1N, SPI1_SCK/I2S1_CK, OTG_HS_ULPI_CK, EVENTOUT; additional functions ADC12_IN5 and DAC_OUT2. |
| 22 | PA6 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA6; alternate functions TIM1_BKIN, TIM3_CH1, TIM8_BKIN, SPI1_MISO, I2S2_MCK, TIM13_CH1, DCMI_PIXCLK, EVENTOUT; additional function ADC12_IN6. |
| 23 | PA7 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA7; alternate functions TIM1_CH1N, TIM3_CH2, TIM8_CH1N, SPI1_MOSI/I2S1_SD, TIM14_CH1, FMC_SDNWE, EVENTOUT; additional function ADC12_IN7. |
| 24 | PC4 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC4; alternate functions I2S1_MCK, SPDIFRX_IN2, FMC_SDNE0, EVENTOUT; additional function ADC12_IN14. |
| 25 | PC5 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC5; alternate functions USART3_RX, SPDIFRX_IN3, FMC_SDCKE0, EVENTOUT; additional function ADC12_IN15. |
| 26 | PB0 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB0; alternate functions TIM1_CH2N, TIM3_CH3, TIM8_CH2N, SPI3_MOSI/I2S3_SD, UART4_CTS, OTG_HS_ULPI_D1, SDIO_D1, EVENTOUT; additional function ADC12_IN8. |
| 27 | PB1 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB1; alternate functions TIM1_CH3N, TIM3_CH4, TIM8_CH3N, OTG_HS_ULPI_D2, SDIO_D2, EVENTOUT; additional function ADC12_IN9. |
| 28 | PB2-BOOT1(PB2) | bidirectional | 5V-tolerant (FT) general-purpose I/O PB2, also used as BOOT1 boot-mode selection input combined with BOOT0; alternate functions TIM2_CH4, SAI1_SD_A, SPI3_MOSI/I2S3_SD, QUADSPI_CLK, OTG_HS_ULPI_D4, SDIO_CK, EVENTOUT. |
| 29 | PB10 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB10; alternate functions TIM2_CH3, I2C2_SCL, SPI2_SCK/I2S2_CK, SAI1_SCK_A, USART3_TX, OTG_HS_ULPI_D3, EVENTOUT. |
| 30 | VCAP_1 | power_in | External decoupling capacitor connection pin for the internal voltage regulator, per the specified VCAP_1/VCAP_2 operating conditions. |
| 31 | VSS | power_in | Digital ground supply pin. |
| 32 | VDD | power_in | Digital power supply pin within the 1.7 V to 3.6 V application supply range. |
| 33 | PB12 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB12; alternate functions TIM1_BKIN, I2C2_SMBA, SPI2_NSS/I2S2_WS, SAI1_SCK_B, USART3_CK, CAN2_RX, OTG_HS_ULPI_D5, OTG_HS_ID, EVENTOUT. |
| 34 | PB13 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB13; alternate functions TIM1_CH1N, SPI2_SCK/I2S2_CK, USART3_CTS, CAN2_TX, OTG_HS_ULPI_D6, EVENTOUT; additional function OTG_HS_VBUS. |
| 35 | PB14 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB14, supplied by VDDUSB; alternate functions TIM1_CH2N, TIM8_CH2N, SPI2_MISO, USART3_RTS, TIM12_CH1, OTG_HS_DM, EVENTOUT. |
| 36 | PB15 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB15, supplied by VDDUSB; alternate functions RTC_REFIN, TIM1_CH3N, TIM8_CH3N, SPI2_MOSI/I2S2_SD, TIM12_CH2, OTG_HS_DP, EVENTOUT. |
| 37 | PC6 | bidirectional | 5V-tolerant with I2C FM+ option (FTf) general-purpose I/O PC6; alternate functions TIM3_CH1, TIM8_CH1, FMPI2C1_SCL, I2S2_MCK, USART6_TX, SDIO_D6, DCMI_D0, EVENTOUT. |
| 38 | PC7 | bidirectional | 5V-tolerant with I2C FM+ option (FTf) general-purpose I/O PC7; alternate functions TIM3_CH2, TIM8_CH2, FMPI2C1_SDA, SPI2_SCK/I2S2_CK, I2S3_MCK, SPDIFRX_IN1, USART6_RX, SDIO_D7, DCMI_D1, EVENTOUT. |
| 39 | PC8 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC8; alternate functions TRACED0, TIM3_CH3, TIM8_CH3, UART5_RTS, USART6_CK, SDIO_D0, DCMI_D2, EVENTOUT. |
| 40 | PC9 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC9; alternate functions MCO2, TIM3_CH4, TIM8_CH4, I2C3_SDA, I2S_CKIN, UART5_CTS, QUADSPI_BK1_IO0, SDIO_D1, DCMI_D3, EVENTOUT. |
| 41 | PA8 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA8; alternate functions MCO1, TIM1_CH1, I2C3_SCL, USART1_CK, OTG_FS_SOF, EVENTOUT. |
| 42 | PA9 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA9; alternate functions TIM1_CH2, I2C3_SMBA, SPI2_SCK/I2S2_CK, SAI1_SD_B, USART1_TX, DCMI_D0, EVENTOUT; additional function OTG_FS_VBUS. |
| 43 | PA10 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA10; alternate functions TIM1_CH3, USART1_RX, OTG_FS_ID, DCMI_D1, EVENTOUT. |
| 44 | PA11 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA11, supplied by VDDUSB; alternate functions TIM1_CH4, USART1_CTS, CAN1_RX, OTG_FS_DM, EVENTOUT. |
| 45 | PA12 | bidirectional | 5V-tolerant (FT) general-purpose I/O PA12, supplied by VDDUSB; alternate functions TIM1_ETR, USART1_RTS, SAI2_FS_B, CAN1_TX, OTG_FS_DP, EVENTOUT. |
| 46 | PA13(JTMS-SWDIO) | bidirectional | 5V-tolerant (FT) general-purpose I/O PA13, default JTAG/SW debug function JTMS-SWDIO; alternate function EVENTOUT. |
| 47 | VSS | power_in | Digital ground supply pin. |
| 48 | VDD | power_in | Digital power supply pin within the 1.7 V to 3.6 V application supply range. |
| 49 | PA14(JTCK-SWCLK) | bidirectional | 5V-tolerant (FT) general-purpose I/O PA14, default JTAG/SW debug function JTCK-SWCLK; alternate function EVENTOUT. |
| 50 | PA15(JTDI) | bidirectional | 5V-tolerant (FT) general-purpose I/O PA15, default JTAG function JTDI; alternate functions TIM2_CH1/TIM2_ETR, HDMI_CEC, SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, UART4_RTS, EVENTOUT. |
| 51 | PC10 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC10; alternate functions SPI3_SCK/I2S3_CK, USART3_TX, UART4_TX, QUADSPI_BK1_IO1, SDIO_D2, DCMI_D8, EVENTOUT. |
| 52 | PC11 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC11; alternate functions SPI3_MISO, USART3_RX, UART4_RX, QUADSPI_BK2_NCS, SDIO_D3, DCMI_D4, EVENTOUT. |
| 53 | PC12 | bidirectional | 5V-tolerant (FT) general-purpose I/O PC12; alternate functions I2C2_SDA, SPI3_MOSI/I2S3_SD, USART3_CK, UART5_TX, SDIO_CK, DCMI_D9, EVENTOUT. |
| 54 | PD2 | bidirectional | 5V-tolerant (FT) general-purpose I/O PD2; alternate functions TIM3_ETR, UART5_RX, SDIO_CMD, DCMI_D11, EVENTOUT. |
| 55 | PB3(JTDO/TRACESWO) | bidirectional | 5V-tolerant (FT) general-purpose I/O PB3, default JTAG/trace function JTDO/TRACESWO; alternate functions TIM2_CH2, I2C2_SDA, SPI1_SCK/I2S1_CK, SPI3_SCK/I2S3_CK, EVENTOUT. |
| 56 | PB4(NJTRST) | bidirectional | 5V-tolerant (FT) general-purpose I/O PB4, default JTAG function NJTRST; alternate functions TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, SPI2_NSS/I2S2_WS, EVENTOUT. |
| 57 | PB5 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB5; alternate functions TIM3_CH2, I2C1_SMBA, SPI1_MOSI/I2S1_SD, SPI3_MOSI/I2S3_SD, CAN2_RX, OTG_HS_ULPI_D7, FMC_SDCKE1, DCMI_D10, EVENTOUT. |
| 58 | PB6 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB6; alternate functions TIM4_CH1, HDMI_CEC, I2C1_SCL, USART1_TX, CAN2_TX, QUADSPI_BK1_NCS, FMC_SDNE1, DCMI_D5, EVENTOUT. |
| 59 | PB7 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB7; alternate functions TIM4_CH2, I2C1_SDA, USART1_RX, SPDIFRX_IN0, FMC_NL, DCMI_VSYNC, EVENTOUT. |
| 60 | BOOT0 | input | Dedicated boot-mode selection input (sampled at reset together with BOOT1/PB2 to select the boot memory), also usable as VPP for Flash programming. |
| 61 | PB8 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB8; alternate functions TIM2_CH1/TIM2_ETR, TIM4_CH3, TIM10_CH1, I2C1_SCL, CAN1_RX, SDIO_D4, DCMI_D6, EVENTOUT. |
| 62 | PB9 | bidirectional | 5V-tolerant (FT) general-purpose I/O PB9; alternate functions TIM2_CH2, TIM4_CH4, TIM11_CH1, I2C1_SDA, SPI2_NSS/I2S2_WS, SAI1_FS_B, CAN1_TX, SDIO_D5, DCMI_D7, EVENTOUT. |
| 63 | VSS | power_in | Digital ground supply pin. |
| 64 | VDD | power_in | Digital power supply pin within the 1.7 V to 3.6 V application supply range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-64(10x10) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |
CAD (KiCad official)
- Symbol:
STM32F446RET6 - Footprint:
Package_QFP:LQFP-64_10x10mm_P0.5mm - 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files:
stm32f446ret6-etched.step/stm32f446ret6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32f446ret6.step/stm32f446ret6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (202 pp, sha256
cdb7c352f656b84b, retrieved 2026-09-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).