8-bit CISC microcontroller featuring an 8051 core and 20 MHz clock speed. This integrated circuit offers 64KB of Flash program memory and 2.25KB of RAM. Designed for through-hole mounting, it comes in a 40-pin PDIP Wide Body plastic package with a 2.79mm pin pitch. Supports SPI and UART interfaces, with 8 ADC channels and 3 timers. Operates across a wide temperature range of -40°C to 85°C with supply voltages from 2.5V to 5.5V.
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Microchip AT89LP51RD2-20PU technical specifications.
| Basic Package Type | Through Hole |
| Package Family Name | DIP |
| Package/Case | PDIP W |
| Package Description | Plastic Dual In Line Package Wide Body |
| Lead Shape | Through Hole |
| Pin Count | 40 |
| PCB | 40 |
| Package Length (mm) | 52.6(Max) |
| Package Width (mm) | 14.4(Max) |
| Package Height (mm) | 3.94(Max) |
| Seated Plane Height (mm) | 5.59(Max) |
| Pin Pitch (mm) | 2.79(Max) |
| Package Material | Plastic |
| Mounting | Through Hole |
| Family Name | AT89 |
| Data Bus Width | 8bit |
| Instruction Set Architecture | CISC |
| Maximum Clock Rate | 20MHz |
| Maximum CPU Frequency | 20MHz |
| Device Core | 8051 |
| Program Memory Type | Flash |
| Program Memory Size | 64KB |
| RAM Size | 2.25KB |
| Number of Programmable I/Os | 40 |
| Core Architecture | 8051 |
| Programmability | Yes |
| Number of Timers | 3 |
| Interface Type | SPI/UART |
| CAN | 0 |
| I2C | 0 |
| SPI | 1 |
| Ethernet | 0 |
| UART | 1 |
| USART | 0 |
| USB | 0 |
| I2S | 0 |
| Max Operating Supply Voltage | 5.5V |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 85°C |
| ADC Channels | 8 |
| Number of ADCs | Single |
| Cage Code | 60991 |
| EU RoHS | Yes |
| HTS Code | 8542310001 |
| Schedule B | 8542310000 |
| ECCN | EAR99 |
| Automotive | No |
| AEC Qualified | No |
| PPAP | No |
| RoHS Versions | 2011/65/EU, 2015/863 |
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