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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

STM32F103ZET6TR

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-144(20x20)

STM32F103ZET6TR from STMicroelectronics, in a LQFP-144(20x20). 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	PE2	bidirectional	Port E bit 2, general-purpose I/O, 5V tolerant, alternate functions include ETM trace clock and FSMC address line A23.
2	PE3	bidirectional	Port E bit 3, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 0 and FSMC address line A19.
3	PE4	bidirectional	Port E bit 4, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 1 and FSMC address line A20.
4	PE5	bidirectional	Port E bit 5, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 2 and FSMC address line A21.
5	PE6	bidirectional	Port E bit 6, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 3 and FSMC address line A22.
6	VBAT	power_in	Backup power supply pin for RTC and backup registers, accepts 2.0 to 3.6 V.
7	PC13-TAMPER-RTC	bidirectional	Port C bit 13, backup domain I/O, alternate function TAMPER-RTC, limited to 2 MHz output speed with 30 pF load maximum.
8	PC14-OSC32_IN	bidirectional	Port C bit 14, backup domain I/O, alternate function OSC32_IN for 32 kHz crystal oscillator input.
9	PC15-OSC32_OUT	bidirectional	Port C bit 15, backup domain I/O, alternate function OSC32_OUT for 32 kHz crystal oscillator output.
10	PF0	bidirectional	Port F bit 0, general-purpose I/O, 5V tolerant, alternate function FSMC_A0 for address line 0.
11	PF1	bidirectional	Port F bit 1, general-purpose I/O, 5V tolerant, alternate function FSMC_A1 for address line 1.
12	PF2	bidirectional	Port F bit 2, general-purpose I/O, 5V tolerant, alternate function FSMC_A2 for address line 2.
13	PF3	bidirectional	Port F bit 3, general-purpose I/O, 5V tolerant, alternate function FSMC_A3 for address line 3.
14	PF4	bidirectional	Port F bit 4, general-purpose I/O, 5V tolerant, alternate function FSMC_A4 for address line 4.
15	PF5	bidirectional	Port F bit 5, general-purpose I/O, 5V tolerant, alternate function FSMC_A5 for address line 5.
16	VSS_5	power_in	Ground supply pin, connect to system ground (0 V).
17	VDD_5	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
18	PF6	bidirectional	Port F bit 6, general-purpose I/O, alternate functions include ADC3_IN4 analog input and FSMC_NIORD control signal.
19	PF7	bidirectional	Port F bit 7, general-purpose I/O, alternate functions include ADC3_IN5 analog input and FSMC_NREG control signal.
20	PF8	bidirectional	Port F bit 8, general-purpose I/O, alternate functions include ADC3_IN6 analog input and FSMC_NIOWR control signal.
21	PF9	bidirectional	Port F bit 9, general-purpose I/O, alternate functions include ADC3_IN7 analog input and FSMC_CD control signal.
22	PF10	bidirectional	Port F bit 10, general-purpose I/O, alternate functions include ADC3_IN8 analog input and FSMC_INTR control signal.
23	OSC_IN	input	High-speed external oscillator input, accepts 4 to 16 MHz crystal oscillator signal.
24	OSC_OUT	output	High-speed external oscillator output, drives 4 to 16 MHz crystal oscillator load.
25	NRST	bidirectional	Reset pin, active low input for system reset or open-drain output for reset signaling.
26	PC0	bidirectional	Port C bit 0, general-purpose I/O, alternate function ADC123_IN10 for analog-to-digital converter input.
27	PC1	bidirectional	Port C bit 1, general-purpose I/O, alternate function ADC123_IN11 for analog-to-digital converter input.
28	PC2	bidirectional	Port C bit 2, general-purpose I/O, alternate function ADC123_IN12 for analog-to-digital converter input.
29	PC3	bidirectional	Port C bit 3, general-purpose I/O, alternate function ADC123_IN13 for analog-to-digital converter input.
30	VSSA	power_in	Analog ground reference pin, connect to system ground for ADC and DAC operation.
31	VREF-	power_in	ADC negative reference voltage pin, typically connected to VSSA or ground, range 0 V.
32	VREF+	power_in	ADC positive reference voltage pin, accepts 2.4 to 3.6 V, can be internally connected to VDDA.
33	VDDA	power_in	Analog power supply pin, accepts 2.4 to 3.6 V for ADC, DAC, and comparator operation.
34	PA0-WKUP	bidirectional	Port A bit 0, general-purpose I/O with wakeup capability, alternate functions include USART2_CTS, ADC123_IN0, and TIM2/TIM5/TIM8 timer inputs.
35	PA1	bidirectional	Port A bit 1, general-purpose I/O, alternate functions include USART2_RTS, ADC123_IN1, and TIM2/TIM5 timer inputs.
36	PA2	bidirectional	Port A bit 2, general-purpose I/O, alternate functions include USART2_TX, ADC123_IN2, and TIM2/TIM5 timer inputs.
37	PA3	bidirectional	Port A bit 3, general-purpose I/O, alternate functions include USART2_RX, ADC123_IN3, and TIM2/TIM5 timer inputs.
38	VSS_4	power_in	Ground supply pin, connect to system ground (0 V).
39	VDD_4	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
40	PA4	bidirectional	Port A bit 4, general-purpose I/O, alternate functions include SPI1_NSS, USART2_CK, DAC_OUT1, and ADC12_IN4 analog input.
41	PA5	bidirectional	Port A bit 5, general-purpose I/O, alternate functions include SPI1_SCK, DAC_OUT2, and ADC12_IN5 analog input.
42	PA6	bidirectional	Port A bit 6, general-purpose I/O, alternate functions include SPI1_MISO, TIM8_BKIN, ADC12_IN6, and TIM1/TIM3 timer functions.
43	PA7	bidirectional	Port A bit 7, general-purpose I/O, alternate functions include SPI1_MOSI, TIM8_CH1N, ADC12_IN7, and TIM1/TIM3 timer functions.
44	PC4	bidirectional	Port C bit 4, general-purpose I/O, alternate function ADC12_IN14 for analog-to-digital converter input.
45	PC5	bidirectional	Port C bit 5, general-purpose I/O, alternate function ADC12_IN15 for analog-to-digital converter input.
46	PB0	bidirectional	Port B bit 0, general-purpose I/O, alternate functions include ADC12_IN8 and TIM1/TIM3/TIM8 timer functions.
47	PB1	bidirectional	Port B bit 1, general-purpose I/O, alternate functions include ADC12_IN9 and TIM1/TIM3/TIM8 timer functions.
48	PB2	bidirectional	Port B bit 2, 5V tolerant general-purpose I/O, alternate function BOOT1 for boot mode selection.
49	PF11	bidirectional	Port F bit 11, 5V tolerant general-purpose I/O, alternate function FSMC_NIOS16 for memory control signal.
50	PF12	bidirectional	Port F bit 12, 5V tolerant general-purpose I/O, alternate function FSMC_A6 for address line 6.
51	VSS_6	power_in	Ground supply pin, connect to system ground (0 V).
52	VDD_6	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
53	PF13	bidirectional	Port F bit 13, 5V tolerant general-purpose I/O, alternate function FSMC_A7 for address line 7.
54	PF14	bidirectional	Port F bit 14, 5V tolerant general-purpose I/O, alternate function FSMC_A8 for address line 8.
55	PF15	bidirectional	Port F bit 15, 5V tolerant general-purpose I/O, alternate function FSMC_A9 for address line 9.
56	PG0	bidirectional	Port G bit 0, 5V tolerant general-purpose I/O, alternate function FSMC_A10 for address line 10.
57	PG1	bidirectional	Port G bit 1, 5V tolerant general-purpose I/O, alternate function FSMC_A11 for address line 11.
58	PE7	bidirectional	Port E bit 7, 5V tolerant general-purpose I/O, alternate functions include FSMC_D4 data line and TIM1_ETR timer input.
59	PE8	bidirectional	Port E bit 8, 5V tolerant general-purpose I/O, alternate functions include FSMC_D5 data line and TIM1_CH1N timer output.
60	PE9	bidirectional	Port E bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_D6 data line and TIM1_CH1 timer output.
61	VSS_7	power_in	Ground supply pin, connect to system ground (0 V).
62	VDD_7	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
63	PE10	bidirectional	Port E bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_D7 data line and TIM1_CH2N timer output.
64	PE11	bidirectional	Port E bit 11, 5V tolerant general-purpose I/O, alternate functions include FSMC_D8 data line and TIM1_CH2 timer output.
65	PE12	bidirectional	Port E bit 12, 5V tolerant general-purpose I/O, alternate functions include FSMC_D9 data line and TIM1_CH3N timer output.
66	PE13	bidirectional	Port E bit 13, 5V tolerant general-purpose I/O, alternate functions include FSMC_D10 data line and TIM1_CH3 timer output.
67	PE14	bidirectional	Port E bit 14, 5V tolerant general-purpose I/O, alternate functions include FSMC_D11 data line and TIM1_CH4 timer output.
68	PE15	bidirectional	Port E bit 15, 5V tolerant general-purpose I/O, alternate functions include FSMC_D12 data line and TIM1_BKIN brake input.
69	PB10	bidirectional	Port B bit 10, 5V tolerant general-purpose I/O, alternate functions include I2C2_SCL, USART3_TX, and TIM2_CH3 timer output.
70	PB11	bidirectional	Port B bit 11, 5V tolerant general-purpose I/O, alternate functions include I2C2_SDA, USART3_RX, and TIM2_CH4 timer output.
71	VSS_1	power_in	Ground supply pin, connect to system ground (0 V).
72	VDD_1	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
73	PB12	bidirectional	Port B bit 12, 5V tolerant general-purpose I/O, alternate functions include SPI2_NSS, I2S2_WS, I2C2_SMBA, USART3_CK, and TIM1_BKIN.
74	PB13	bidirectional	Port B bit 13, 5V tolerant general-purpose I/O, alternate functions include SPI2_SCK, I2S2_CK, USART3_CTS, and TIM1_CH1N.
75	PB14	bidirectional	Port B bit 14, 5V tolerant general-purpose I/O, alternate functions include SPI2_MISO, TIM1_CH2N, and USART3_RTS.
76	PB15	bidirectional	Port B bit 15, 5V tolerant general-purpose I/O, alternate functions include SPI2_MOSI, I2S2_SD, and TIM1_CH3N.
77	PD8	bidirectional	Port D bit 8, 5V tolerant general-purpose I/O, alternate functions include FSMC_D13 data line and USART3_TX.
78	PD9	bidirectional	Port D bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_D14 data line and USART3_RX.
79	PD10	bidirectional	Port D bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_D15 data line and USART3_CK.
80	PD11	bidirectional	Port D bit 11, 5V tolerant general-purpose I/O, alternate functions include FSMC_A16 address line and USART3_CTS.
81	PD12	bidirectional	Port D bit 12, 5V tolerant general-purpose I/O, alternate functions include FSMC_A17 address line, TIM4_CH1 timer, and USART3_RTS.
82	PD13	bidirectional	Port D bit 13, 5V tolerant general-purpose I/O, alternate functions include FSMC_A18 address line and TIM4_CH2 timer.
83	VSS_8	power_in	Ground supply pin, connect to system ground (0 V).
84	VDD_8	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
85	PD14	bidirectional	Port D bit 14, 5V tolerant general-purpose I/O, alternate functions include FSMC_D0 data line and TIM4_CH3 timer output.
86	PD15	bidirectional	Port D bit 15, 5V tolerant general-purpose I/O, alternate functions include FSMC_D1 data line and TIM4_CH4 timer output.
87	PG2	bidirectional	Port G bit 2, 5V tolerant general-purpose I/O, alternate function FSMC_A12 for address line 12.
88	PG3	bidirectional	Port G bit 3, 5V tolerant general-purpose I/O, alternate function FSMC_A13 for address line 13.
89	PG4	bidirectional	Port G bit 4, 5V tolerant general-purpose I/O, alternate function FSMC_A14 for address line 14.
90	PG5	bidirectional	Port G bit 5, 5V tolerant general-purpose I/O, alternate function FSMC_A15 for address line 15.
91	PG6	bidirectional	Port G bit 6, 5V tolerant general-purpose I/O, alternate function FSMC_INT2 for interrupt signal.
92	PG7	bidirectional	Port G bit 7, 5V tolerant general-purpose I/O, alternate function FSMC_INT3 for interrupt signal.
93	PG8	bidirectional	Port G bit 8, 5V tolerant general-purpose I/O.
94	VSS_9	power_in	Ground supply pin, connect to system ground (0 V).
95	VDD_9	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
96	PC6	bidirectional	Port C bit 6, 5V tolerant general-purpose I/O, alternate functions include I2S2_MCK, TIM8_CH1, SDIO_D6, and TIM3_CH1.
97	PC7	bidirectional	Port C bit 7, 5V tolerant general-purpose I/O, alternate functions include I2S3_MCK, TIM8_CH2, SDIO_D7, and TIM3_CH2.
98	PC8	bidirectional	Port C bit 8, 5V tolerant general-purpose I/O, alternate functions include TIM8_CH3, SDIO_D0, and TIM3_CH3.
99	PC9	bidirectional	Port C bit 9, 5V tolerant general-purpose I/O, alternate functions include TIM8_CH4, SDIO_D1, and TIM3_CH4.
100	PA8	bidirectional	Port A bit 8, 5V tolerant general-purpose I/O, alternate functions include USART1_CK, TIM1_CH1, and MCO master clock output.
101	PA9	bidirectional	Port A bit 9, 5V tolerant general-purpose I/O, alternate functions include USART1_TX and TIM1_CH2 timer output.
102	PA10	bidirectional	Port A bit 10, 5V tolerant general-purpose I/O, alternate functions include USART1_RX and TIM1_CH3 timer output.
103	PA11	bidirectional	Port A bit 11, 5V tolerant general-purpose I/O, alternate functions include USART1_CTS, USB D- line, CAN_RX, and TIM1_CH4.
104	PA12	bidirectional	Port A bit 12, 5V tolerant general-purpose I/O, alternate functions include USART1_RTS, USB D+ line, CAN_TX, and TIM1_ETR.
105	PA13	bidirectional	Port A bit 13, 5V tolerant general-purpose I/O, alternate function JTMS-SWDIO for JTAG and SWD debug interface.
106	NC	unconnected	Not connected, no internal connection to chip.
107	VSS_2	power_in	Ground supply pin, connect to system ground (0 V).
108	VDD_2	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
109	PA14	bidirectional	Port A bit 14, 5V tolerant general-purpose I/O, alternate function JTCK-SWCLK for JTAG and SWD debug interface.
110	PA15	bidirectional	Port A bit 15, 5V tolerant general-purpose I/O, alternate functions include JTDI, SPI3_NSS, I2S3_WS, TIM2_CH1_ETR, and SPI1_NSS.
111	PC10	bidirectional	Port C bit 10, 5V tolerant general-purpose I/O, alternate functions include UART4_TX, SDIO_D2, and USART3_TX.
112	PC11	bidirectional	Port C bit 11, 5V tolerant general-purpose I/O, alternate functions include UART4_RX, SDIO_D3, and USART3_RX.
113	PC12	bidirectional	Port C bit 12, 5V tolerant general-purpose I/O, alternate functions include UART5_TX, SDIO_CK, and USART3_CK.
114	PD0	bidirectional	Port D bit 0, 5V tolerant general-purpose I/O, alternate functions include OSC_IN oscillator input, FSMC_D2 data line, and CAN_RX.
115	PD1	bidirectional	Port D bit 1, 5V tolerant general-purpose I/O, alternate functions include OSC_OUT oscillator output, FSMC_D3 data line, and CAN_TX.
116	PD2	bidirectional	Port D bit 2, 5V tolerant general-purpose I/O, alternate functions include TIM3_ETR, UART5_RX, and SDIO_CMD.
117	PD3	bidirectional	Port D bit 3, 5V tolerant general-purpose I/O, alternate functions include FSMC_CLK memory clock and USART2_CTS.
118	PD4	bidirectional	Port D bit 4, 5V tolerant general-purpose I/O, alternate functions include FSMC_NOE output enable and USART2_RTS.
119	PD5	bidirectional	Port D bit 5, 5V tolerant general-purpose I/O, alternate functions include FSMC_NWE write enable and USART2_TX.
120	VSS_10	power_in	Ground supply pin, connect to system ground (0 V).
121	VDD_10	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
122	PD6	bidirectional	Port D bit 6, 5V tolerant general-purpose I/O, alternate functions include FSMC_NWAIT wait signal and USART2_RX.
123	PD7	bidirectional	Port D bit 7, 5V tolerant general-purpose I/O, alternate functions include FSMC_NE1 chip select and USART2_CK.
124	PG9	bidirectional	Port G bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_NE2 chip select and FSMC_NCE3.
125	PG10	bidirectional	Port G bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_NCE4_1 and FSMC_NE3 chip selects.
126	PG11	bidirectional	Port G bit 11, 5V tolerant general-purpose I/O, alternate function FSMC_NCE4_2 for chip select.
127	PG12	bidirectional	Port G bit 12, 5V tolerant general-purpose I/O, alternate function FSMC_NE4 for chip select.
128	PG13	bidirectional	Port G bit 13, 5V tolerant general-purpose I/O, alternate function FSMC_A24 for address line 24.
129	PG14	bidirectional	Port G bit 14, 5V tolerant general-purpose I/O, alternate function FSMC_A25 for address line 25.
130	VSS_11	power_in	Ground supply pin, connect to system ground (0 V).
131	VDD_11	power_in	Main power supply pin, accepts 2.0 to 3.6 V.
132	PG15	bidirectional	Port G bit 15, 5V tolerant general-purpose I/O.
133	PB3	bidirectional	Port B bit 3, 5V tolerant general-purpose I/O, alternate functions include JTDO, SPI3_SCK, I2S3_CK, TRACESWO, TIM2_CH2, and SPI1_SCK.
134	PB4	bidirectional	Port B bit 4, 5V tolerant general-purpose I/O, alternate functions include NJTRST, SPI3_MISO, TIM3_CH1, and SPI1_MISO.
135	PB5	bidirectional	Port B bit 5, general-purpose I/O, alternate functions include I2C1_SMBA, SPI3_MOSI, I2S3_SD, TIM3_CH2, and SPI1_MOSI.
136	PB6	bidirectional	Port B bit 6, 5V tolerant general-purpose I/O, alternate functions include I2C1_SCL, TIM4_CH1, and USART1_TX.
137	PB7	bidirectional	Port B bit 7, 5V tolerant general-purpose I/O, alternate functions include I2C1_SDA, FSMC_NADV address valid, TIM4_CH2, and USART1_RX.
138	BOOT0	input	Boot mode selection pin, determines whether device boots from flash memory or system bootloader.
139	PB8	bidirectional	Port B bit 8, 5V tolerant general-purpose I/O, alternate functions include TIM4_CH3, SDIO_D4, I2C1_SCL, and CAN_RX.
140	PB9	bidirectional	Port B bit 9, 5V tolerant general-purpose I/O, alternate functions include TIM4_CH4, SDIO_D5, I2C1_SDA, and CAN_TX.
141	PE0	bidirectional	Port E bit 0, 5V tolerant general-purpose I/O, alternate functions include TIM4_ETR and FSMC_NBL0 byte lane select.
142	PE1	bidirectional	Port E bit 1, 5V tolerant general-purpose I/O, alternate function FSMC_NBL1 for byte lane select.
143	VSS_3	power_in	Ground supply pin, connect to system ground (0 V).
144	VDD_3	power_in	Main power supply pin, accepts 2.0 to 3.6 V.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	LQFP-144(20x20)
Category	Embedded Processors & Controllers
Pins	144

CAD (KiCad official)

Symbol: STM32F103ZET6TR
Footprint: Package_QFP:LQFP-144_20x20mm_P0.5mm
3D model: LQFP-144(20x20) (KiCad packages3D, STEP)
3D model files: stm32f103zet6tr-etched.step / stm32f103zet6tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f103zet6tr.step / stm32f103zet6tr.glb are the bare package body.

Provenance

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

Datasheet: STMicroelectronics datasheet (130 pp, sha256 6cc345d224870bff, retrieved 2026-10-07, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF