Mechanical Dimensions & Land Pattern (WLCSP-49(3x3.2))
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-49(3x3.2) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — STM32F411CEY6UTR (WLCSP-49(3x3.2))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of STM32F411CEY6UTR (WLCSP-49(3x3.2))?
Manufactured by ST, the STM32F411CEY6UTR is housed in a WLCSP-49(3x3.2) package with 49 pins and a 0.40 mm lead pitch, supporting a VCC supply range of 1.7 V to 3.6 V. Key pins include: A1 (PA14: Multiplexed I/O & Peripheral Pin PA14 (SWD/JTAG)), A2 (PA15: Multiplexed I/O & Peripheral Pin PA15 (UART, SPI, SWD/JTAG)), A3 (PB3: Multiplexed I/O & Peripheral Pin PB3 (UART, SPI, I2C, PWM, SWD/JTAG)), A4 (PB4: Multiplexed I/O & Peripheral Pin PB4 (SPI, I2C)), A5 (BOOT0: Input-Only Pin BOOT0 (General)), A6 (VSS: Ground Reference Pin (VSS)).
What are the IPC-7351B PCB Footprint dimensions for STM32F411CEY6UTR?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), STM32F411CEY6UTR (WLCSP-49(3x3.2)) has a nominal body envelope of 3.00 × 3.20 mm, pitch e = 0.40 mm, and 49 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for STM32F411CEY6UTR?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for STM32F411CEY6UTR (ST, WLCSP-49(3x3.2)) 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 (49 pins) & STM32F411 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| A1 | PA14 | Digital_IO | Signal terminal PA14 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA14. Supported peripheral buses: SWD/JTAG. |
| A2 | 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, SWD/JTAG. |
| A3 | PB3 | Digital_IO | Signal terminal PB3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_SCK, SPI3_SCK, I2C2_SDA. Supported peripheral buses: UART, SPI, I2C, PWM, SWD/JTAG. |
| A4 | PB4 | Digital_IO | Signal terminal PB4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MISO, SPI3_MISO. Supported peripheral buses: SPI, I2C. |
| A5 | BOOT0 | Digital_IO | Signal terminal BOOT0 (I, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: BOOT0. Supported peripheral buses: General. |
| A6 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| A7 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| B1 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| B2 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| B3 | PA13 | Digital_IO | Signal terminal PA13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA13. Supported peripheral buses: SWD/JTAG. |
| B4 | PB5 | Digital_IO | Signal terminal PB5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: I2C1_SMBA, SPI1_MOSI, SPI3_MOSI. Supported peripheral buses: SPI, I2C, PWM. |
| B5 | PB8 | Digital_IO | Signal terminal PB8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C1_SCL, SPI5_MOSI. Supported peripheral buses: SPI, I2C, PWM. |
| B6 | PDR_ON | Digital_IO | Signal terminal PDR_ON (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PDR_ON. Supported peripheral buses: General. |
| B7 | VBAT | Power_In | Primary positive power supply input (VBAT) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| C1 | PA11 | Digital_IO | Signal terminal PA11 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_MISO. Supported peripheral buses: USB, UART, SPI, PWM. |
| C2 | PA10 | Digital_IO | Signal terminal PA10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI5_MOSI. Supported peripheral buses: USB, UART, SPI, PWM. |
| C3 | PA12 | Digital_IO | Signal terminal PA12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI5_MISO. Supported peripheral buses: USB, UART, SPI. |
| C4 | PB6 | Digital_IO | Signal terminal PB6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C1_SCL. Supported peripheral buses: UART, I2C, PWM. |
| C5 | PB9 | Digital_IO | Signal terminal PB9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C1_SDA, SPI2_NSS. Supported peripheral buses: SPI, I2C, PWM. |
| C6 | 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. |
| C7 | 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. |
| D1 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C3_SCL. Supported peripheral buses: USB, UART, I2C, RTC/CLK. |
| D2 | PA9 | Digital_IO | Signal terminal PA9 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C3_SMBA. Supported peripheral buses: USB, UART, I2C, PWM. |
| D3 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| D4 | PB7 | Digital_IO | Signal terminal PB7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C1_SDA. Supported peripheral buses: UART, I2C, PWM. |
| D5 | PC13 - ANTI_TAMP | RF_50Ohm | Signal terminal PC13 - ANTI_TAMP (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PC13 - ANTI_TAMP. Supported peripheral buses: RTC/CLK. |
| D6 | PH1 - OSC_OUT | Digital_IO | Signal terminal PH1 - OSC_OUT (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PH1 - OSC_OUT. Supported peripheral buses: RTC/CLK. |
| D7 | PH0 OSC IN -_ | Digital_IO | Signal terminal PH0 OSC IN -_ (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PH0 OSC IN -_. Supported peripheral buses: RTC/CLK. |
| E1 | PB15 | Digital_IO | Signal terminal PB15 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MOSI. Supported peripheral buses: SPI, PWM, RTC/CLK. |
| E2 | PB12 | Digital_IO | Signal terminal PB12 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C2_SMBA, SPI2_NSS, SPI4_NSS, SPI3_SCK. Supported peripheral buses: SPI, I2C. |
| E3 | PB10 | Digital_IO | Signal terminal PB10 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: I2C2_SCL, SPI2_SCK. Supported peripheral buses: SPI, I2C, PWM. |
| E4 | PA3 | Digital_IO | Signal terminal PA3 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA3. Supported peripheral buses: UART, ADC, PWM. |
| E5 | PA2 | Digital_IO | Signal terminal PA2 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PA2. Supported peripheral buses: UART, ADC, PWM. |
| E6 | VSSA | GND | 0V electrical ground return terminal (VSSA) for internal core logic, I/O drivers, and analog sub-blocks. |
| E7 | NRST | Digital_IO | Active-low hardware reset terminal (NRST): pulling this pin Low resets the processor core and peripherals. |
| F1 | PB14 | Digital_IO | Signal terminal PB14 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_MISO. Supported peripheral buses: SPI, PWM. |
| F2 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| F3 | PA7 | Digital_IO | Signal terminal PA7 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MOSI. Supported peripheral buses: SPI, ADC, PWM. |
| F4 | PA6 | Digital_IO | Signal terminal PA6 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_MISO. Supported peripheral buses: SPI, ADC, PWM. |
| F5 | PA5 | Digital_IO | Signal terminal PA5 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_SCK. Supported peripheral buses: SPI, ADC. |
| F6 | PA0WKUP - | Digital_IO | Signal terminal PA0WKUP - (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA0WKUP -. Supported peripheral buses: UART, ADC, PWM. |
| F7 | VREF+ | Analog | Signal terminal VREF+ (Analog, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VREF+. Supported peripheral buses: General. |
| G1 | PB13 | Digital_IO | Signal terminal PB13 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI2_SCK, SPI4_SCK. Supported peripheral buses: SPI, PWM. |
| G2 | VCAP_1 | Digital_IO | Signal terminal VCAP_1 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VCAP_1. Supported peripheral buses: General. |
| G3 | PB2 | Digital_IO | Signal terminal PB2 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: PB2. Supported peripheral buses: General. |
| G4 | PB1 | Digital_IO | Signal terminal PB1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI5_NSS. Supported peripheral buses: SPI, ADC, PWM. |
| G5 | PB0 | Digital_IO | Signal terminal PB0 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI5_SCK. Supported peripheral buses: SPI, ADC, PWM. |
| G6 | PA4 | Digital_IO | Signal terminal PA4 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI1_NSS, SPI3_NSS. Supported peripheral buses: UART, SPI, ADC. |
| G7 | PA1 | Digital_IO | Signal terminal PA1 (I/O, 3.3V VDD (5V-Tolerant FT) domain). Multiplexed alternate functions: SPI4_MOSI. Supported peripheral buses: UART, SPI, ADC, PWM. |






