| PartNumber | AT89LP51IC2-20MU | AT89LP51IC2-20AAU | AT89LP51IC2-20JU |
| Description | 8-bit Microcontrollers - MCU Sngle-Cycle 8051 32K ISP Flsh,2.4-5.5V | 8-bit Microcontrollers - MCU Sngle-Cycle 8051 32K ISP Flsh,2.4-5.5V | 8-bit Microcontrollers - MCU Sngle-Cycle 8051 32K ISP Flsh,2.4-5.5V |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | VQFN-44 | LQFP-44 | PLCC-44 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 256 kB | 256 kB | 256 kB |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Tray | Tube |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Processor Series | AT89LP51IC2 | AT89LP51IC2 | AT89LP51IC2 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 360 | 160 | 27 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Unit Weight | - | 0.012561 oz | 0.084185 oz |
| RoHS | - | - | Y |
| Moisture Sensitive | - | - | Yes |