8-bit CISC microcontroller featuring a 20 MHz 8051 core with 64KB Flash program memory and 2.25KB RAM. This surface-mount device offers 40 programmable I/Os, three timers, and SPI/UART interfaces. Housed in a 44-pin VQFN EP package (7x7x0.88mm) with an exposed pad, it operates from 2.5V to 5.5V and supports 8 ADC channels. Ideal for embedded applications requiring robust performance within a compact footprint.
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Microchip AT89LP51RD2-20MUR technical specifications.
| Basic Package Type | Non-Lead-Frame SMT |
| Package Family Name | QFN |
| Package/Case | VQFN EP |
| Package Description | Very Thin Quad Flat No Lead Package, Exposed Pad |
| Lead Shape | No Lead |
| Pin Count | 44 |
| PCB | 44 |
| Package Length (mm) | 7 |
| Package Width (mm) | 7 |
| Package Height (mm) | 0.88 |
| Seated Plane Height (mm) | 0.9 |
| Pin Pitch (mm) | 0.5 |
| Package Material | Plastic |
| Mounting | Surface Mount |
| 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 |
| Automotive | No |
| AEC Qualified | No |
| PPAP | No |
| RoHS Versions | 2011/65/EU, 2015/863 |
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