STM32L476RCT6 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 (1.55 V-3.6 V) for RTC, LSE oscillator, and 32 backup registers when VDD is off.
2	PC13	bidirectional	GPIO in VBAT domain; also RTC tamper/timestamp, WKUP2 wakeup, RTC_OUT alternate.
3	PC14-OSC32_IN	bidirectional	PC14 GPIO / LSE 32.768 kHz crystal input. Function after reset is OSC32_IN alternate on PC14.
4	PC15-OSC32_OUT	bidirectional	PC15 GPIO / LSE 32.768 kHz crystal output.
5	PH0-OSC_IN	bidirectional	PH0 GPIO / HSE main crystal oscillator input (4-48 MHz).
6	PH1-OSC_OUT	bidirectional	PH1 GPIO / HSE main crystal oscillator output.
7	NRST	bidirectional	Bidirectional device reset with internal weak pull-up. Active low.
8	PC0	bidirectional	5 V-tolerant GPIO with analog switch; alt: LPTIM1_IN1, I2C3_SCL, LPUART1_RX, LCD_SEG18; add'l: ADC123_IN1.
9	PC1	bidirectional	5 V-tolerant GPIO with analog switch; alt: LPTIM1_OUT, I2C3_SDA, LPUART1_TX, SAI1_SD_A, LCD_SEG19; add'l: ADC123_IN2.
10	PC2	bidirectional	5 V-tolerant GPIO with analog switch; alt: SPI2_MISO, DFSDM_CKOUT, LCD_SEG20; add'l: ADC123_IN3.
11	PC3	bidirectional	5 V-tolerant GPIO with analog switch; alt: SPI2_MOSI, SAI1_SD_A, LCD_VLCD, LPTIM2_ETR; add'l: ADC123_IN4.
12	VSSA/VREF-	power_in	Analog ground and negative reference voltage for ADC/DAC/VREFBUF. Tied together in LQFP64.
13	VDDA/VREF+	power_in	Analog supply (1.62 V-3.6 V) and positive reference for ADC/DAC/VREFBUF/comparators/opamps. Tied together in LQFP64.
14	PA0	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM2_CH1, TIM2_ETR, TIM5_CH1, TIM8_ETR, USART2_CTS, UART4_TX, SAI1_EXTCLK, TSC_G1_IO1, LCD_SEG0; add'l: ADC12_IN5, COMP1_INM, WKUP1, RTC_TAMP2.
15	PA1	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM2_CH2, TIM5_CH2, TIM15_CH1N, SPI1_SCK, USART2_RTS_DE, UART4_RX, LCD_SEG1, TSC_G1_IO2; add'l: ADC12_IN6, OPAMP1_VINP/VINM.
16	PA2	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM2_CH3, TIM5_CH3, TIM15_CH1, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS, SAI2_EXTCLK, LCD_SEG0, TSC_G1_IO3; add'l: ADC12_IN7, WKUP4, COMP2_INM.
17	PA3	bidirectional	3.6 V-tolerant GPIO; alt: TIM2_CH4, TIM5_CH4, TIM15_CH2, USART2_RX, LPUART1_RX, QUADSPI_CLK, SAI1_MCLK_A, LCD_SEG2; add'l: ADC12_IN8, OPAMP1_VOUT, VREF+ out.
18	VSS	power_in	Digital ground.
19	VDD	power_in	Digital supply (1.71 V-3.6 V).
20	PA4	bidirectional	3.6 V-tolerant GPIO with analog switch; alt: SPI1_NSS, SPI3_NSS, USART2_CK, SAI1_FS_B, LPTIM2_OUT; add'l: ADC12_IN9, DAC1_OUT1, OPAMP1_VINP.
21	PA5	bidirectional	3.6 V-tolerant GPIO with analog switch; alt: TIM2_CH1, TIM2_ETR, TIM8_CH1N, SPI1_SCK, LPTIM2_ETR; add'l: ADC12_IN10, DAC1_OUT2, OPAMP1_VOUT.
22	PA6	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM1_BKIN, TIM3_CH1, TIM8_BKIN, TIM16_CH1, SPI1_MISO, USART3_CTS, LPUART1_CTS, QUADSPI_BK1_IO3, LCD_SEG3, TSC_G2_IO3; add'l: ADC12_IN11, COMP1_INM.
23	PA7	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM1_CH1N, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, QUADSPI_BK1_IO2, LCD_SEG4, TIM17_CH1; add'l: ADC12_IN12, OPAMP2_VINM.
24	PC4	bidirectional	5 V-tolerant GPIO with analog switch; alt: USART3_TX, LCD_SEG22; add'l: ADC12_IN13, COMP1_INM.
25	PC5	bidirectional	5 V-tolerant GPIO with analog switch; alt: USART3_RX, LCD_SEG23; add'l: ADC12_IN14, COMP1_INP, WKUP5.
26	PB0	bidirectional	3.6 V-tolerant GPIO with analog switch; alt: TIM1_CH2N, TIM3_CH3, TIM8_CH2N, USART3_CK, QUADSPI_BK1_IO1, LCD_SEG5, COMP1_OUT; add'l: ADC12_IN15, OPAMP2_VOUT.
27	PB1	bidirectional	5 V-tolerant GPIO with analog switch; alt: TIM1_CH3N, TIM3_CH4, TIM8_CH3N, DFSDM_DATIN0, USART3_RTS_DE, QUADSPI_BK1_IO0, LCD_SEG6, LPTIM2_IN1; add'l: ADC12_IN16, COMP1_INM.
28	PB2	bidirectional	5 V-tolerant GPIO with analog switch; alt: RTC_OUT, LPTIM1_OUT, I2C3_SMBA, DFSDM_CKIN0; add'l: COMP1_INP.
29	PB10	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM2_CH3, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, QUADSPI_CLK, SAI1_SCK_A, LCD_SEG10, TSC_SYNC, COMP1_OUT.
30	PB11	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM2_CH4, I2C2_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS, LCD_SEG11, COMP2_OUT.
31	VSS	power_in	Digital ground.
32	VDD	power_in	Digital supply (1.71 V-3.6 V).
33	PB12	bidirectional	5 V-tolerant LCD GPIO; alt: TIM1_BKIN, TIM15_BKIN, I2C2_SMBA, SPI2_NSS, USART3_CK, LPUART1_RTS_DE, SAI2_FS_A, LCD_SEG12, TSC_G1_IO1; add'l: COMP2_INP.
34	PB13	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM1_CH1N, TIM15_CH1N, I2C2_SCL, SPI2_SCK, USART3_CTS, LPUART1_CTS, SAI2_SCK_A, LCD_SEG13, TSC_G1_IO2; add'l: COMP2_INM.
35	PB14	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM1_CH2N, TIM15_CH1, I2C2_SDA, SPI2_MISO, USART3_RTS_DE, SAI2_MCLK_A, LCD_SEG14, TSC_G1_IO3; add'l: COMP2_INP.
36	PB15	bidirectional	5 V-tolerant LCD GPIO; alt: RTC_REFIN, TIM1_CH3N, TIM15_CH2, SPI2_MOSI, SAI2_SD_A, LCD_SEG15, TSC_G1_IO4.
37	PC6	bidirectional	5 V-tolerant LCD GPIO; alt: TIM3_CH1, TIM8_CH1, DFSDM_DATIN3, SDMMC_D6, TSC_G4_IO1, LCD_SEG24.
38	PC7	bidirectional	5 V-tolerant LCD GPIO; alt: TIM3_CH2, TIM8_CH2, DFSDM_CKIN3, SDMMC_D7, TSC_G4_IO2, LCD_SEG25.
39	PC8	bidirectional	5 V-tolerant LCD GPIO; alt: TIM3_CH3, TIM8_CH3, SDMMC_D0, TSC_G4_IO3, LCD_SEG26.
40	PC9	bidirectional	5 V-tolerant LCD GPIO; alt: TIM3_CH4, TIM8_CH4, TIM8_BKIN2, I2C3_SDA, SPI2_MISO, SAI2_EXTCLK, SDMMC_D1, TSC_G4_IO4, LCD_SEG27, OTG_FS_NOE.
41	PA8	bidirectional	5 V-tolerant LCD GPIO; alt: MCO, TIM1_CH1, USART1_CK, OTG_FS_SOF, LCD_COM0, LPTIM2_OUT, SAI1_SCK_A, SWPMI1_IO, TSC_SYNC.
42	PA9	bidirectional	5 V-tolerant LCD/USB GPIO; alt: TIM1_CH2, TIM15_BKIN, I2C1_SCL, SPI2_SCK, USART1_TX, SAI1_FS_A, LCD_COM1, TSC_G4_IO1.
43	PA10	bidirectional	5 V-tolerant LCD/USB GPIO; alt: TIM1_CH3, TIM17_BKIN, I2C1_SDA, SPI2_MISO, USART1_RX, OTG_FS_ID, SAI1_SD_A, LCD_COM2.
44	PA11	bidirectional	5 V-tolerant USB GPIO; alt: TIM1_CH4, TIM1_BKIN2, SPI1_MISO, USART1_CTS, CAN1_RX, OTG_FS_DM, TIM1_BKIN2_COMP1.
45	PA12	bidirectional	5 V-tolerant USB GPIO; alt: TIM1_ETR, SPI1_MOSI, USART1_RTS_DE, CAN1_TX, OTG_FS_DP, COMP2_OUT.
46	PA13 (JTMS-SWDIO)	bidirectional	5 V-tolerant USB-domain GPIO; JTAG/SW debug JTMS-SWDIO after reset. Alt: IR_OUT, USB_NOE, SWPMI1_TX, SAI1_SD_B.
47	VSS	power_in	Digital ground.
48	VDDUSB	power_in	USB transceiver supply (3.0 V-3.6 V); can be tied to VDD if USB not used.
49	PA14 (JTCK-SWCLK)	bidirectional	5 V-tolerant LCD GPIO; JTAG/SW debug JTCK-SWCLK after reset. Alt: LPTIM1_OUT, I2C1_SMBA, SAI1_FS_B, TSC_G4_IO2.
50	PA15 (JTDI)	bidirectional	5 V-tolerant LCD GPIO; JTAG JTDI after reset. Alt: TIM2_CH1, TIM2_ETR, USART2_RX, USART3_RTS_DE, UART4_RTS_DE, SPI1_NSS, SPI3_NSS, TSC_G3_IO1, LCD_SEG17.
51	PC10	bidirectional	5 V-tolerant LCD GPIO; alt: SPI3_SCK, USART3_TX, UART4_TX, SDMMC_D2, LCD_COM4/LCD_SEG28/LCD_SEG40, TSC_G3_IO2.
52	PC11	bidirectional	5 V-tolerant LCD GPIO; alt: SPI3_MISO, USART3_RX, UART4_RX, SDMMC_D3, LCD_COM5/LCD_SEG29/LCD_SEG41, TSC_G3_IO3.
53	PC12	bidirectional	5 V-tolerant LCD GPIO; alt: SPI3_MOSI, USART3_CK, UART5_TX, SDMMC_CK, LCD_COM6/LCD_SEG30/LCD_SEG42, TSC_G3_IO4.
54	PD2	bidirectional	5 V-tolerant LCD GPIO; alt: TIM3_ETR, UART5_RX, SDMMC_CMD, LCD_COM7/LCD_SEG31/LCD_SEG43, TSC_SYNC.
55	PB3 (JTDO-TRACESWO)	bidirectional	5 V-tolerant GPIO with analog switch; JTAG JTDO/TRACESWO after reset. Alt: TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS_DE, SAI1_SCK_B, LCD_SEG7, TSC_G7_IO2.
56	PB4 (NJTRST)	bidirectional	5 V-tolerant GPIO with analog switch; JTAG NJTRST after reset. Alt: TIM3_CH1, TIM17_BKIN, I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS, UART5_RTS_DE, SAI1_MCLK_B, TSC_G2_IO1, LCD_SEG8; add'l: COMP2_INP.
57	PB5	bidirectional	5 V-tolerant GPIO with analog switch; alt: LPTIM1_IN1, TIM3_CH2, TIM16_BKIN, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, UART5_TX, CAN2_RX, SAI1_SD_B, LCD_SEG9, TSC_G2_IO2, COMP2_OUT.
58	PB6	bidirectional	5 V-tolerant Fm+ GPIO with analog switch; alt: LPTIM1_ETR, TIM4_CH1, TIM8_BKIN2, TIM16_CH1N, I2C1_SCL, USART1_TX, CAN2_TX, DFSDM_DATIN5, SAI1_FS_B, TSC_G2_IO3.
59	PB7	bidirectional	5 V-tolerant Fm+ GPIO with analog switch; alt: LPTIM1_IN2, TIM4_CH2, TIM8_BKIN, TIM17_CH1N, I2C1_SDA, USART1_RX, UART4_CTS, DFSDM_CKIN5, FMC_NL, TSC_G2_IO4; add'l: COMP2_INM.
60	BOOT0	input	Boot mode selection input. Sampled at reset to choose boot source (main Flash, system memory bootloader, or SRAM).
61	PB8	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM4_CH3, TIM16_CH1, I2C1_SCL, DFSDM_DATIN6, CAN1_RX, SDMMC_D4, SAI1_MCLK_A, LCD_SEG16.
62	PB9	bidirectional	5 V-tolerant Fm+/LCD GPIO; alt: TIM4_CH4, TIM17_CH1, I2C1_SDA, IR_OUT, DFSDM_CKIN6, CAN1_TX, SDMMC_D5, SAI1_FS_A, LCD_COM3.
63	VSS	power_in	Digital ground.
64	VDD	power_in	Digital supply (1.71 V-3.6 V).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	LQFP-64(10x10)
Category	MCU
Pins	64

Ordering variants

Same part, different packaging or reel option.

STM32L476RCT6
STM32L476RCT6RET6
STM32L476RCT6RGT6
STM32L476RCT6TR
STM32L476RCT6RET6TR
STM32L476RCT6RGT6TR
STM32L476RCT6VCT6
STM32L476RCT6VET6
STM32L476RCT6VGT6
STM32L476RCT6ZCT6
STM32L476RCT6ZET6
STM32L476RCT6ZGT6
STM32L476RCT6QEI6
STM32L476RCT6QGI6
STM32L476RCT6JEY6
STM32L476RCT6JGY6
STM32L476RCT6MEY6
STM32L476RCT6MGY6

CAD (KiCad official)

Symbol: STM32L476RCT6
Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
3D model: LQFP-64(10x10) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: STMicroelectronics datasheet (232 pp, sha256 9cc18092f1a2d4f2, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF