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| Part Number | AT89C2051-24SJ | 
| Datasheet | AT89C2051-24SJ datasheet | 
| Description | IC MCU 8BIT 2KB FLASH 20SOIC | 
| Manufacturer | Microchip Technology | 
| Series | 89C | 
| Part Status | Obsolete | 
| Core Processor | 8051 | 
| Core Size | 8-Bit | 
| Speed | 24MHz | 
| Connectivity | UART/USART | 
| Peripherals | LED | 
| Number of I/O | 15 | 
| Program Memory Size | 2KB (2K x 8) | 
| Program Memory Type | FLASH | 
| EEPROM Size | - | 
| RAM Size | 128 x 8 | 
| Voltage - Supply (Vcc/Vdd) | 4V ~ 6V | 
| Data Converters | - | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 20-SOIC (0.295", 7.50mm Width) | 
| Base Part Number | 20-SOIC |