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| Part Number | AT89LP51ID2-20JU | 
| Datasheet | AT89LP51ID2-20JU datasheet | 
| Description | IC MCU 8BIT 64KB FLASH 44PLCC | 
| Manufacturer | Microchip Technology | 
| Series | 89LP | 
| Part Status | Active | 
| Core Processor | 8051 | 
| Core Size | 8-Bit | 
| Speed | 20MHz | 
| Connectivity | EBI/EMI, I²C, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | 
| Number of I/O | 40 | 
| Program Memory Size | 64KB (64K x 8) | 
| Program Memory Type | FLASH | 
| EEPROM Size | 4K x 8 | 
| RAM Size | 2.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.4V ~ 5.5V | 
| Data Converters | A/D 7x10b | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 44-LCC (J-Lead) | 
| Base Part Number | 44-PLCC (16.6x16.6) |