Mechanical Dimensions & Land Pattern (TFBGA-257)
Extracted from Datasheet & IPC-7351B NormalizedRecommended Companion BOM & Drop-In Equivalents
Passive external components per reference schematic and 1:1 pin-compatible alternatives| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit TFBGA-257 | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — STM32MP157AAD3T (TFBGA-257)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of STM32MP157AAD3T (TFBGA-257)?
Manufactured by ST, the STM32MP157AAD3T is housed in a TFBGA-257 package with 257 pins and a 0.50 mm lead pitch, supporting a VCC supply range of 1.71 V to 3.6 V. Key pins include: A1 (VSS: Ground Reference Pin (VSS)), A2 (PD1: Multiplexed I/O & Peripheral Pin PD1 (UART, I2C)), A3 (PB7: Multiplexed I/O & Peripheral Pin PB7 (UART, I2C)), A4 (PC6: Multiplexed I/O & Peripheral Pin PC6 (UART)), A6 (VSS: Ground Reference Pin (VSS)), A7 (PD3: Multiplexed I/O & Peripheral Pin PD3 (UART, SPI)).
What are the IPC-7351B PCB Footprint dimensions for STM32MP157AAD3T?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), STM32MP157AAD3T (TFBGA-257) has a nominal body envelope of 10.00 × 10.00 mm, pitch e = 0.50 mm, and 257 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for STM32MP157AAD3T?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for STM32MP157AAD3T (ST, TFBGA-257) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.
Static Reference Appendix: Pinout Table (257 pins) & STM32MP157 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| A1 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| A2 | PD1 | Digital_IO | Signal terminal PD1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD1. Supported peripheral buses: UART, I2C. |
| A3 | PB7 | Digital_IO | Signal terminal PB7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB7. Supported peripheral buses: UART, I2C. |
| A4 | PC6 | Digital_IO | Signal terminal PC6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC6. Supported peripheral buses: UART. |
| A6 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| A7 | PD3 | Digital_IO | Signal terminal PD3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCK. Supported peripheral buses: UART, SPI. |
| A9 | PC8 | Digital_IO | Signal terminal PC8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC8. Supported peripheral buses: UART, PWM. |
| A10 | PE4 | Digital_IO | Signal terminal PE4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_NSS_SAI1FSA. Supported peripheral buses: SPI. |
| A12 | DSI_CKP | Digital_IO | Signal terminal DSI_CKP (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_CKP. Supported peripheral buses: General. |
| A13 | DSI_D1P | Digital_IO | Signal terminal DSI_D1P (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_D1P. Supported peripheral buses: General. |
| A15 | JTDO - TRACESWO | Digital_IO | Signal terminal JTDO - TRACESWO (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: JTDO - TRACESWO. Supported peripheral buses: SWD/JTAG. |
| A16 | JTCKSWCLK - | Digital_IO | Signal terminal JTCKSWCLK - (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: JTCKSWCLK -. Supported peripheral buses: SWD/JTAG. |
| A17 | DDR_DQ0 | Digital_IO | Signal terminal DDR_DQ0 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ0. Supported peripheral buses: General. |
| A18 | DDR_DQ1 | Digital_IO | Signal terminal DDR_DQ1 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ1. Supported peripheral buses: General. |
| A19 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B1 | PG15 | Digital_IO | Signal terminal PG15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C2_SDA. Supported peripheral buses: UART, SPI, I2C. |
| B2 | PE6 | Digital_IO | Signal terminal PE6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_MOSI_SAI1SDA. Supported peripheral buses: SPI. |
| B3 | PD7 | Digital_IO | Signal terminal PD7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD7. Supported peripheral buses: UART, I2C. |
| B4 | PA15 | Digital_IO | Signal terminal PA15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_NSS, SPI3_NSS. Supported peripheral buses: UART, SPI. |
| B5 | PG6 | Digital_IO | Signal terminal PG6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PG6. Supported peripheral buses: General. |
| B6 | PB4 | Digital_IO | Signal terminal PB4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MISO, SPI3_MISO, SPI2_NSS, SPI6_MISOSDMMC2D3. Supported peripheral buses: SPI, PWM. |
| B7 | PE5 | Digital_IO | Signal terminal PE5 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_MISO_SAI1SCKA. Supported peripheral buses: SPI. |
| B8 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C3_SCL, SPI3_MOSI. Supported peripheral buses: UART, SPI, I2C, RTC/CLK. |
| B9 | PC9 | Digital_IO | Signal terminal PC9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC9. Supported peripheral buses: PWM. |
| B10 | PC10 | Digital_IO | Signal terminal PC10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI3_SCK. Supported peripheral buses: UART, SPI. |
| B11 | DSI_D0P | Digital_IO | Signal terminal DSI_D0P (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_D0P. Supported peripheral buses: General. |
| B12 | DSI_CKN | Digital_IO | Signal terminal DSI_CKN (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_CKN. Supported peripheral buses: General. |
| B13 | DSI_D1N | Digital_IO | Signal terminal DSI_D1N (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_D1N. Supported peripheral buses: General. |
| B14 | NJTRST | Digital_IO | Signal terminal NJTRST (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: NJTRST. Supported peripheral buses: SWD/JTAG. |
| B15 | JTDI | Digital_IO | Signal terminal JTDI (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: JTDI. Supported peripheral buses: SWD/JTAG. |
| B16 | DDR_DQ3 | Digital_IO | Signal terminal DDR_DQ3 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ3. Supported peripheral buses: General. |
| B17 | DDR_DQ7 | Digital_IO | Signal terminal DDR_DQ7 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ7. Supported peripheral buses: General. |
| B18 | DDR_DQS0N | Digital_IO | Signal terminal DDR_DQS0N (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQS0N. Supported peripheral buses: General. |
| B19 | DDR_DQS0P | Digital_IO | Signal terminal DDR_DQS0P (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQS0P. Supported peripheral buses: General. |
| C1 | PE12 | Digital_IO | Signal terminal PE12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_SCKSDMMC1D0DIR. Supported peripheral buses: SPI, PWM. |
| C2 | PE0 | Digital_IO | Signal terminal PE0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI3_SCK. Supported peripheral buses: SPI. |
| C3 | PD4 | Digital_IO | Signal terminal PD4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD4. Supported peripheral buses: UART. |
| C4 | PD5 | Digital_IO | Signal terminal PD5 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD5. Supported peripheral buses: UART. |
| C5 | PD0 | Digital_IO | Signal terminal PD0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD0. Supported peripheral buses: UART, I2C. |
| C6 | PA9 | Digital_IO | Signal terminal PA9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCK. Supported peripheral buses: UART, SPI, PWM. |
| C7 | PB3 | Digital_IO | Signal terminal PB3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_SCK, SPI3_SCK. Supported peripheral buses: UART, SPI. |
| C8 | PB15 | Digital_IO | Signal terminal PB15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MOSI. Supported peripheral buses: UART, SPI, RTC/CLK. |
| C9 | PB9 | Digital_IO | Signal terminal PB9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_NSS. Supported peripheral buses: SPI. |
| C10 | PC7 | Digital_IO | Signal terminal PC7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC7. Supported peripheral buses: UART. |
| C11 | PC11 | Digital_IO | Signal terminal PC11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI3_MISO. Supported peripheral buses: UART, SPI. |
| C12 | DSI_D0N | Digital_IO | Signal terminal DSI_D0N (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DSI_D0N. Supported peripheral buses: General. |
| C13 | VDD_DSI | Power_In | Primary positive power supply input (VDD_DSI) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| C14 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| C15 | JTMS SWDIO - | Digital_IO | Signal terminal JTMS SWDIO - (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: JTMS SWDIO -. Supported peripheral buses: SWD/JTAG. |
| C16 | DDR_ RESETN | Digital_IO | Active-low hardware reset terminal (DDR_ RESETN): pulling this pin Low resets the processor core and peripherals. |
| C17 | DDR_DQM0 | Digital_IO | Signal terminal DDR_DQM0 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQM0. Supported peripheral buses: General. |
| C18 | DDR_DQ2 | Digital_IO | Signal terminal DDR_DQ2 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ2. Supported peripheral buses: General. |
| C19 | DDR_DQ6 | Digital_IO | Signal terminal DDR_DQ6 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ6. Supported peripheral buses: General. |
| D1 | PG12 | Digital_IO | Signal terminal PG12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PG12. Supported peripheral buses: UART, SPI. |
| D2 | PE11 | Digital_IO | Signal terminal PE11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_NSSUSART6CK. Supported peripheral buses: SPI, PWM. |
| D3 | PE15 | Digital_IO | Signal terminal PE15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE15. Supported peripheral buses: UART, SPI. |
| D17 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| D18 | DDR_DQ4 | Digital_IO | Signal terminal DDR_DQ4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ4. Supported peripheral buses: General. |
| D19 | DDR_DQ5 | Digital_IO | Signal terminal DDR_DQ5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_DQ5. Supported peripheral buses: General. |
| E1 | PD8 | Digital_IO | Signal terminal PD8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD8. Supported peripheral buses: UART. |
| E2 | NRST | Digital_IO | Active-low hardware reset terminal (NRST): pulling this pin Low resets the processor core and peripherals. |
| E3 | PE13 | Digital_IO | Signal terminal PE13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE13. Supported peripheral buses: General. |
| E17 | DDR_A13 | Digital_IO | Signal terminal DDR_A13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_A13. Supported peripheral buses: General. |
| E18 | DDR_A9 | Digital_IO | Signal terminal DDR_A9 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: DDR_A9. Supported peripheral buses: General. |












