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| PartNumber | MKW21D512VHA5 | MKW21D256VHA5 | MKW21D256VHA5R |
| Description | RF Microcontrollers - MCU 32 BIT, 512K FLASH W/O USB | RF Microcontrollers - MCU 32 BIT,256K FLASH W/O USB | RF Microcontrollers - MCU MKW21D256VHA5/HVQFN63R///REEL 13 Q1 DP |
| Manufacturer | NXP | NXP | NXP |
| Product Category | RF Microcontrollers - MCU | RF Microcontrollers - MCU | RF Microcontrollers - MCU |
| RoHS | Y | Y | - |
| Core | ARM Cortex M4 | ARM Cortex M4 | ARM Cortex M4 |
| Operating Frequency | 2.4 GHz | 2.4 GHz | 2.4 GHz |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Program Memory Size | 512 kB | - | 256 kB |
| Data RAM Size | 64 kB | - | 32 kB |
| Maximum Clock Frequency | 50 MHz | - | 50 MHz |
| ADC Resolution | 16 bit | - | 16 bit |
| Operating Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum Operating Temperature | + 105 C | + 105 C | + 105 C |
| Package / Case | LQFP-64 | LGA-63 | LQFP-64 |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Packaging | Tray | Tray | Reel |
| Program Memory Type | Flash | - | Flash |
| Brand | NXP / Freescale | NXP / Freescale | NXP / Freescale |
| Data RAM Type | SRAM | - | SRAM |
| Interface Type | I2C, SPI, UART, USB | SPI | I2C, SPI, UART, USB |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Moisture Sensitive | Yes | Yes | - |
| Product Type | RF Microcontrollers - MCU | RF Microcontrollers - MCU | RF Microcontrollers - MCU |
| Factory Pack Quantity | 260 | 260 | 2000 |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Voltage Min | 1.8 V | 1.8 V | 1.8 V |
| Part # Aliases | 935321841557 | 935314943557 | 935314943518 |
| Unit Weight | 0.006639 oz | 0.006639 oz | 0.006639 oz |