| PartNumber | MB9AF421KPMC-G-JNE2 | MB9AF421KWQN-G-JNE2 | MB9AF421KPMC1-G-JNE2 |
| Description | ARM Microcontrollers - MCU 64KB FLASH 4KB RAM ARM Cortex M3 | ARM Microcontrollers - MCU 64KB FLASH 4KB RAM ARM Cortex M3 | ARM Microcontrollers - MCU 64KB FLASH 4KB RAM ARM Cortex M3 |
| Manufacturer | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | LQFP-48 | QFN-48 | LQFP-52 |
| Series | MB9A420L | MB9A420L | MB9A420L |
| Core | ARM Cortex M3 | ARM Cortex M3 | ARM Cortex M3 |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 4 kB | 4 kB | 4 kB |
| Number of I/Os | 36 I/O | 36 I/O | 36 I/O |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 105 C | + 105 C | + 105 C |
| Packaging | Tray | Tray | Tray |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 64 kB | 64 kB | 64 kB |
| Data ROM Type | Flash | Flash | Flash |
| Interface Type | I2C, UART, USART, USB | I2C, UART, USART, USB | I2C, UART, USART, USB |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 250 | 260 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Unit Weight | 0.006409 oz | 0.005309 oz | 0.013210 oz |