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| PartNumber | MCF51AC256ACLKE | MCF51AC256ACPUE | MCF51AC256ACFUE |
| Description | 32-bit Microcontrollers - MCU 256K FLASH, 32K RAM CAN | 32-bit Microcontrollers - MCU 256K FLASH, 32K RAM CAN | 32-bit Microcontrollers - MCU 256K FLASH, 32K RAM CAN |
| Manufacturer | NXP | NXP | NXP |
| Product Category | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | LQFP-80 | LQFP-64 | QFP-64 |
| Series | MCF51AC256 | MCF51AC256 | MCF51AC256 |
| Core | ColdFire V1 | ColdFire V1 | ColdFire V1 |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 50.33 MHz | 50.33 MHz | 50.33 MHz |
| Program Memory Size | 256 kB | 256 kB | 256 kB |
| Data RAM Size | 32 kB | 32 kB | 32 kB |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Number of I/Os | 69 I/O | 54 I/O | 54 I/O |
| Operating Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Tray | Tray |
| Height | 1.5 mm | 1.4 mm | 2.4 mm |
| Length | 14 mm | 10 mm | 14 mm |
| Program Memory Type | Flash | Flash | Flash |
| Width | 14 mm | 10 mm | 14 mm |
| Brand | NXP / Freescale | NXP / Freescale | NXP / Freescale |
| Interface Type | I2C, SPI | SCI, SPI | SCI, SPI |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 24 | 20 | 20 |
| Number of Timers/Counters | 2 Timer | 8 Timer | 8 Timer |
| Processor Series | MCF51AC | MCF51AC | MCF51AC |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| Factory Pack Quantity | 450 | 800 | 420 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 2.7 V | 2.7 V | 2.7 V |
| Tradename | ColdFire | ColdFire | ColdFire |
| Part # Aliases | 935316506557 | 935309283557 | 935323909557 |
| Unit Weight | 0.022575 oz | 0.012224 oz | 0.032156 oz |