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STM32F103ZET6TR

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-144(20x20). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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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