Mechanical Dimensions & Land Pattern (WLCSP-208(5.4x5.5))
Extracted from Datasheet & IPC-7351B NormalizedPackage Body (D × E)Nominal
5.50 × 5.40 mm
Height (A) & Pitch (e)IPC-7351B
A=0.58mm · e=0.35mm
Pad Size (W × L)Level B
0.19 × 0.19 mm
Pins / Total PadsTopology
208P / 208Pad (BGA_GRID)
Recommended 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 WLCSP-208(5.4x5.5) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — STM32U5A9BJY6QTR (WLCSP-208(5.4x5.5))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of STM32U5A9BJY6QTR (WLCSP-208(5.4x5.5))?
Manufactured by ST, the STM32U5A9BJY6QTR is housed in a WLCSP-208(5.4x5.5) package with 208 pins and a 0.35 mm lead pitch, supporting a VCC supply range of 1.71 V to 3.6 V. Key pins include: A2 (VDDUSB: Power Supply Input (VDDUSB — 3.3V VDD (Max 4.0V))), A4 (PA4: Multiplexed I/O & Peripheral Pin PA4 (General)), A6 (VDD: Power Supply Input (VDD — 3.3V VDD (Max 4.0V))), A8 (PA8: Multiplexed I/O & Peripheral Pin PA8 (General)), A10 (PA10: Multiplexed I/O & Peripheral Pin PA10 (General)), A12 (PA12: Multiplexed I/O & Peripheral Pin PA12 (General)).
What are the IPC-7351B PCB Footprint dimensions for STM32U5A9BJY6QTR?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), STM32U5A9BJY6QTR (WLCSP-208(5.4x5.5)) has a nominal body envelope of 5.40 × 5.50 mm, pitch e = 0.35 mm, and 208 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for STM32U5A9BJY6QTR?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for STM32U5A9BJY6QTR (ST, WLCSP-208(5.4x5.5)) 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 (208 pins) & STM32U5A5ZJT / STM32U5A9BJY Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| A2 | VDDUSB | Power_In | Primary positive power supply input (VDDUSB) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| A4 | PA4 | Digital_IO | Signal terminal PA4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA4. Supported peripheral buses: General. |
| A6 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| A8 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA8. Supported peripheral buses: General. |
| A10 | PA10 | Digital_IO | Signal terminal PA10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA10. Supported peripheral buses: General. |
| A12 | PA12 | Digital_IO | Signal terminal PA12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA12. Supported peripheral buses: General. |
| A14 | PA14 | Digital_IO | Signal terminal PA14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA14. Supported peripheral buses: General. |
| A16 | PA16 | Digital_IO | Signal terminal PA16 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA16. Supported peripheral buses: General. |
| A18 | PA18 | Digital_IO | Signal terminal PA18 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA18. Supported peripheral buses: General. |
| A20 | PA20 | Digital_IO | Signal terminal PA20 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA20. Supported peripheral buses: General. |
| A22 | PA22 | Digital_IO | Signal terminal PA22 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA22. Supported peripheral buses: General. |
| A24 | PA24 | Digital_IO | Signal terminal PA24 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA24. Supported peripheral buses: General. |
| A26 | PA26 | Digital_IO | Signal terminal PA26 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA26. Supported peripheral buses: General. |
| B1 | PA12 | Digital_IO | Signal terminal PA12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: SPI1_MOSI. Supported peripheral buses: UART, SPI. |
| B3 | PA13 (JTMS/ SWDIO) | Digital_IO | Signal terminal PA13 (JTMS/ SWDIO) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA13 (JTMS/ SWDIO). Supported peripheral buses: SWD/JTAG. |
| B5 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B7 | PB7 | Digital_IO | Signal terminal PB7 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB7. Supported peripheral buses: General. |
| B9 | PB9 | Digital_IO | Signal terminal PB9 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB9. Supported peripheral buses: General. |
| B11 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B13 | PB13 | Digital_IO | Signal terminal PB13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB13. Supported peripheral buses: General. |
| B15 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B17 | PB17 | Digital_IO | Signal terminal PB17 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB17. Supported peripheral buses: General. |
| B19 | PB19 | Digital_IO | Signal terminal PB19 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB19. Supported peripheral buses: General. |
| B21 | PB21 | Digital_IO | Signal terminal PB21 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB21. Supported peripheral buses: General. |
| B23 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B25 | VBAT | Power_In | Primary positive power supply input (VBAT) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| C2 | PA11 | Digital_IO | Signal terminal PA11 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: SPI1_MISO. Supported peripheral buses: UART, SPI, PWM. |
| C4 | PA10 | Digital_IO | Signal terminal PA10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA10. Supported peripheral buses: UART, I2C, PWM. |
| C6 | PA9 | Digital_IO | Signal terminal PA9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA9. Supported peripheral buses: UART, PWM. |
| C8 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA8. Supported peripheral buses: UART, SPI, RTC/CLK. |
| C10 | PC10 | Digital_IO | Signal terminal PC10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC10. Supported peripheral buses: General. |
| C12 | PC12 | Digital_IO | Signal terminal PC12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC12. Supported peripheral buses: General. |
| C14 | PC14 | Digital_IO | Signal terminal PC14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC14. Supported peripheral buses: General. |
| C16 | PC16 | Digital_IO | Signal terminal PC16 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC16. Supported peripheral buses: General. |
| C18 | PC18 | Digital_IO | Signal terminal PC18 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC18. Supported peripheral buses: General. |
| C20 | PC20 | Digital_IO | Signal terminal PC20 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC20. Supported peripheral buses: General. |
| C22 | PC22 | Digital_IO | Signal terminal PC22 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC22. Supported peripheral buses: General. |
| C24 | PE6 | Digital_IO | Signal terminal PE6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE6. Supported peripheral buses: I2C. |
| C26 | PC14 - OSC32_IN (PC14) | Digital_IO | Signal terminal PC14 - OSC32_IN (PC14) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC14 - OSC32_IN (PC14). Supported peripheral buses: RTC/CLK. |
| D1 | VDD11USB | Power_In | Primary positive power supply input (VDD11USB) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| D3 | PC7 | Digital_IO | Signal terminal PC7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC7. Supported peripheral buses: PWM. |
| D5 | PC6 | Digital_IO | Signal terminal PC6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC6. Supported peripheral buses: PWM. |
| D7 | PC8 | Digital_IO | Signal terminal PC8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC8. Supported peripheral buses: UART, PWM. |
| D9 | PC9 | Digital_IO | Signal terminal PC9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC9. Supported peripheral buses: UART, PWM. |
| D11 | PA14 (JTCK/ SWCLK) | Digital_IO | Signal terminal PA14 (JTCK/ SWCLK) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C1_SMBA, I2C4_SMBA. Supported peripheral buses: I2C, SWD/JTAG. |
| D13 | PD13 | Digital_IO | Signal terminal PD13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD13. Supported peripheral buses: General. |
| D15 | PD15 | Digital_IO | Signal terminal PD15 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD15. Supported peripheral buses: General. |
| D17 | PD17 | Digital_IO | Signal terminal PD17 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD17. Supported peripheral buses: General. |
| D19 | PD19 | Digital_IO | Signal terminal PD19 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD19. Supported peripheral buses: General. |
| D21 | PD21 | Digital_IO | Signal terminal PD21 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD21. Supported peripheral buses: General. |
| D23 | PC13 | Digital_IO | Signal terminal PC13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC13. Supported peripheral buses: RTC/CLK. |
| D25 | IOD25 | Digital_IO | General Purpose Digital I/O Pin IOD25 |
| E2 | VDDIO2 | Power_In | Primary positive power supply input (VDDIO2) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| E4 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| E6 | PE6 | Digital_IO | Signal terminal PE6 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE6. Supported peripheral buses: General. |
| E8 | PE8 | Digital_IO | Signal terminal PE8 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE8. Supported peripheral buses: General. |
| E10 | PE10 | Digital_IO | Signal terminal PE10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE10. Supported peripheral buses: General. |
| E12 | PE12 | Digital_IO | Signal terminal PE12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE12. Supported peripheral buses: General. |
| E14 | PE14 | Digital_IO | Signal terminal PE14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE14. Supported peripheral buses: General. |
| E16 | PE16 | Digital_IO | Signal terminal PE16 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE16. Supported peripheral buses: General. |
| E18 | PE18 | Digital_IO | Signal terminal PE18 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE18. Supported peripheral buses: General. |
| E20 | PE20 | Digital_IO | Signal terminal PE20 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE20. Supported peripheral buses: General. |
| E22 | PE3 | Digital_IO | Signal terminal PE3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE3. Supported peripheral buses: UART. |
| E24 | VSSDSI | GND | 0V electrical ground return terminal (VSSDSI) for internal core logic, I/O drivers, and analog sub-blocks. |