| Part Number | AT89S51-24PU | AT89S51-24PI |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Active | Obsolete |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 24MHz | 24MHz |
| Connectivity | UART/USART | UART/USART |
| Peripherals | WDT | WDT |
| Number of I/O | 32 | 32 |
| Program Memory Size | 4KB (4K x 8) | 4KB (4K x 8) |
| Program Memory Type | Flash | Flash |
| EEPROM Size | - | - |
| RAM Size | 128 x 8 | 128 x 8 |
| Voltage - Supply (Vcc/Vdd) | 4V ~ 5.5V | 4V ~ 5.5V |
| Data Converters | - | - |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 40-DIP (0.600", 15.24mm) | 40-DIP (0.600", 15.24mm) |
| Supplier Device Package | 40-PDIP | 40-PDIP |