Mechanical Dimensions & Land Pattern (WLCSP-100(4.4x4.4))
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 WLCSP-100(4.4x4.4) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — STM32WB55VCY7TR (WLCSP-100(4.4x4.4))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of STM32WB55VCY7TR (WLCSP-100(4.4x4.4))?
Manufactured by ST, the STM32WB55VCY7TR is housed in a WLCSP-100(4.4x4.4) package with 100 pins and a 0.40 mm lead pitch. Key pins include: A1 (PA11: Multiplexed I/O & Peripheral Pin PA11 (USB, SPI, PWM)), A2 (PA12: Multiplexed I/O & Peripheral Pin PA12 (UART)), A3 (PA14 (JTCK SWCLK)_: Multiplexed I/O & Peripheral Pin PA14 (JTCK SWCLK)_ (I2C, SWD/JTAG)), A4 (PA15 (JTDI): Multiplexed I/O & Peripheral Pin PA15 (JTDI) (SPI, SWD/JTAG)), A5 (PA13 (JTMS SWDIO)_: Multiplexed I/O & Peripheral Pin PA13 (JTMS SWDIO)_ (USB, SWD/JTAG)), A6 (PC10: Multiplexed I/O & Peripheral Pin PC10 (General)).
What are the IPC-7351B PCB Footprint dimensions for STM32WB55VCY7TR?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), STM32WB55VCY7TR (WLCSP-100(4.4x4.4)) has a nominal body envelope of 4.40 × 4.40 mm, pitch e = 0.40 mm, and 100 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for STM32WB55VCY7TR?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for STM32WB55VCY7TR (ST, WLCSP-100(4.4x4.4)) 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 (100 pins) & STM32WB55 / STM32WB35 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| A1 | PA11 | Digital_IO | Signal terminal PA11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MISOUSART1CTS. Supported peripheral buses: USB, SPI, PWM. |
| A2 | PA12 | Digital_IO | Signal terminal PA12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA12. Supported peripheral buses: UART. |
| A3 | PA14 (JTCK SWCLK)_ | Digital_IO | Signal terminal PA14 (JTCK SWCLK)_ (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA14 (JTCK SWCLK)_. Supported peripheral buses: I2C, SWD/JTAG. |
| A4 | PA15 (JTDI) | Digital_IO | Signal terminal PA15 (JTDI) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_NSS_TSCG3IO1. Supported peripheral buses: SPI, SWD/JTAG. |
| A5 | 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: USB, SWD/JTAG. |
| A6 | PC10 | Digital_IO | Signal terminal PC10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC10. Supported peripheral buses: General. |
| A7 | PD2 | Digital_IO | Signal terminal PD2 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD2. Supported peripheral buses: General. |
| A8 | PD7 | Digital_IO | Signal terminal PD7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD7. Supported peripheral buses: General. |
| A9 | PB3 (JTDO) | Digital_IO | Signal terminal PB3 (JTDO) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB3 (JTDO). Supported peripheral buses: UART, PWM, SWD/JTAG. |
| A10 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| B1 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| B2 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B3 | VDDUSB | Power_In | Primary positive power supply input (VDDUSB) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| B4 | PC9 | Digital_IO | Signal terminal PC9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC9. Supported peripheral buses: USB, SPI. |
| B5 | PA10 | Digital_IO | Signal terminal PA10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA10. Supported peripheral buses: USB, I2C. |
| B6 | PC11 | Digital_IO | Signal terminal PC11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC11. Supported peripheral buses: General. |
| B7 | PD5 | Digital_IO | Signal terminal PD5 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD5. Supported peripheral buses: General. |
| B8 | PD12 | Digital_IO | Signal terminal PD12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD12. Supported peripheral buses: General. |
| B9 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B10 | PE1 | Digital_IO | Signal terminal PE1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE1. Supported peripheral buses: General. |
| C1 | PB13 | Digital_IO | Signal terminal PB13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCKLPUART1CTS. Supported peripheral buses: SPI, PWM. |
| C2 | PD3 | Digital_IO | Signal terminal PD3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCKSPI2MISO. Supported peripheral buses: SPI. |
| C3 | PD1 | Digital_IO | Signal terminal PD1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCKCM4EVENTOUT. Supported peripheral buses: SPI. |
| C4 | PD0 | Digital_IO | Signal terminal PD0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_NSSCM4EVENTOUT. Supported peripheral buses: SPI. |
| C5 | PC12 | Digital_IO | Signal terminal PC12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC12. Supported peripheral buses: RTC/CLK. |
| C6 | PD6 | Digital_IO | Signal terminal PD6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD6. Supported peripheral buses: I2C. |
| C7 | PB4 (NJTRST) | Digital_IO | Signal terminal PB4 (NJTRST) (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C3_SDA, SPI1_MISOUSART1CTS. Supported peripheral buses: SPI, I2C, SWD/JTAG. |
| C8 | PE0 | Digital_IO | Signal terminal PE0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE0. Supported peripheral buses: General. |
| C9 | PD13 | Digital_IO | Signal terminal PD13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD13. Supported peripheral buses: General. |
| C10 | VBAT | Power_In | Primary positive power supply input (VBAT) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| D1 | VDDSMPS | Power_In | Primary positive power supply input (VDDSMPS) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| D2 | PC6 | Digital_IO | Signal terminal PC6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC6. Supported peripheral buses: General. |
| D3 | PD4 | Digital_IO | Signal terminal PD4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MOSI_TSCG5IO1. Supported peripheral buses: SPI. |
| D4 | PD8 | Digital_IO | Signal terminal PD8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD8. Supported peripheral buses: General. |
| D5 | PD9 | Digital_IO | Signal terminal PD9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD9. Supported peripheral buses: General. |
| D6 | PB5 | Digital_IO | Signal terminal PB5 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MOSIUSART1CK. Supported peripheral buses: SPI. |
| D7 | PB7 | Digital_IO | Signal terminal PB7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB7. Supported peripheral buses: I2C. |
| D8 | PD14 | Digital_IO | Signal terminal PD14 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD14. Supported peripheral buses: PWM. |
| D9 | PC15 - OSC32_OUT | Digital_IO | Signal terminal PC15 - OSC32_OUT (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC15 - OSC32_OUT. Supported peripheral buses: RTC/CLK. |
| D10 | PC14 - OSC32_IN | Digital_IO | Signal terminal PC14 - OSC32_IN (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC14 - OSC32_IN. Supported peripheral buses: RTC/CLK. |
| E1 | VLXSMPS | Digital_IO | Signal terminal VLXSMPS (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VLXSMPS. Supported peripheral buses: General. |
| E2 | PB14 | Digital_IO | Signal terminal PB14 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MISO_TSCG1IO3. Supported peripheral buses: SPI, PWM. |
| E3 | PC7 | Digital_IO | Signal terminal PC7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC7. Supported peripheral buses: General. |
| E4 | PD10 | Digital_IO | Signal terminal PD10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD10. Supported peripheral buses: General. |
| E5 | PD11 | Digital_IO | Signal terminal PD11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD11. Supported peripheral buses: General. |
| E6 | PE2 | Digital_IO | Signal terminal PE2 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE2. Supported peripheral buses: General. |
| E7 | PD15 | Digital_IO | Signal terminal PD15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PD15. Supported peripheral buses: PWM. |
| E8 | PH3 BOOT0 - | Digital_IO | Signal terminal PH3 BOOT0 - (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PH3 BOOT0 -. Supported peripheral buses: General. |
| E9 | PH1 | Digital_IO | Signal terminal PH1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PH1. Supported peripheral buses: General. |
| E10 | PH0 | Digital_IO | Signal terminal PH0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PH0. Supported peripheral buses: General. |
| F1 | VSSSMPS | GND | 0V electrical ground return terminal (VSSSMPS) for internal core logic, I/O drivers, and analog sub-blocks. |
| F2 | VFBSMPS | Digital_IO | Signal terminal VFBSMPS (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VFBSMPS. Supported peripheral buses: General. |
| F3 | PB15 | Digital_IO | Signal terminal PB15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MOSI_TSCG1IO4. Supported peripheral buses: SPI, RTC/CLK. |
| F4 | PC8 | Digital_IO | Signal terminal PC8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC8. Supported peripheral buses: General. |
| F5 | PB6 | Digital_IO | Signal terminal PB6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB6. Supported peripheral buses: UART. |
| F6 | PA2 | Digital_IO | Signal terminal PA2 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA2. Supported peripheral buses: General. |
| F7 | PB8 | Digital_IO | Signal terminal PB8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB8. Supported peripheral buses: PWM. |
| F8 | PC0 | Digital_IO | Signal terminal PC0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC0. Supported peripheral buses: ADC. |
| F9 | NRST | Digital_IO | Active-low hardware reset terminal (NRST): pulling this pin Low resets the processor core and peripherals. |
| F10 | PB9 | Digital_IO | Signal terminal PB9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB9. Supported peripheral buses: I2C. |
| G1 | PE4 | Digital_IO | Signal terminal PE4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE4. Supported peripheral buses: General. |
| G2 | PE3 | Digital_IO | Signal terminal PE3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PE3. Supported peripheral buses: General. |
| G3 | PB12 | Digital_IO | Signal terminal PB12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_NSSLPUART1RTS. Supported peripheral buses: SPI. |
| G4 | PC4 | Digital_IO | Signal terminal PC4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC4. Supported peripheral buses: General. |













