| Part Number | AT89C1051U-24PI | AT89C1051U-24SI |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Obsolete | Obsolete |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 24MHz | 24MHz |
| Connectivity | UART/USART | UART/USART |
| Peripherals | LED | LED |
| Number of I/O | 15 | 15 |
| Program Memory Size | 1KB (1K x 8) | 1KB (1K x 8) |
| Program Memory Type | Flash | Flash |
| EEPROM Size | - | - |
| RAM Size | 64 x 8 | 64 x 8 |
| Voltage - Supply (Vcc/Vdd) | 4V ~ 6V | 4V ~ 6V |
| Data Converters | - | - |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Through Hole | Surface Mount |
| Package / Case | 20-DIP (0.300", 7.62mm) | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-PDIP | 20-SOIC |