| PartNumber | AT89C51ED2-SLSUM | AT89C51ED2-SLRUM | AT89C51ED2-SMRUM |
| Description | 8-bit Microcontrollers - MCU 64kB Flash 2048B RAM 2.7V-5.5V | 8-bit Microcontrollers - MCU C51ED2 64K FLASH 3-5.5V Ind | 8-bit Microcontrollers - MCU C51ED2 64K FLASH 3-5.5V |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | PLCC-44 | PLCC-44 | PLCC-68 |
| Series | 89C | - | - |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 60 MHz | 60 MHz | 60 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 2 kB | 2 kB | 2 kB |
| ADC Resolution | No ADC | No ADC | No ADC |
| Number of I/Os | 34 I/O | 32 I/O | 32 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 | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tube | Reel | Tube |
| Height | 3.48 mm | - | - |
| Length | 16.7 mm | - | - |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 16.7 mm | - | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Interface Type | SPI, UART | SPI, UART | SPI, UART |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | 3 Timer |
| Processor Series | AT89x | AT89x | AT89x |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 27 | 500 | 500 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Unit Weight | 0.084185 oz | 0.084185 oz | 0.171777 oz |