| Key ^ | Value |
|---|---|
| Base Product Number | AT89C55 |
| Category | Integrated Circuits (ICs) |
| Connectivity | UART/USART |
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Data Converters, EEPROM Size | - |
| Mfr | Microchip Technology |
| Mounting Type | Through Hole |
| Number of I/O | 32 |
| Operating Temperature | -40?C ~ 85?C (TA) |
| Oscillator Type | Internal |
| Package | Tube |
| Package / Case | 40-DIP (0.600", 15.24mm) |
| Peripherals | WDT |
| Product Status | Obsolete |
| Program Memory Size | 20KB (20K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 256 x 8 |
| Series | 89C |
| Speed | 24MHz |
| Supplier Device Package | 40-PDIP |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 5.5V |