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| TYPE | DESCRIPTION |
| Mfr | Microchip Technology |
| Series | 89C |
| Package | Tray |
| Product Status | Obsolete |
| DigiKey Programmable | Not Verified |
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Speed | 24MHz |
| Connectivity | UART/USART |
| Peripherals | WDT |
| Number of I/O | 32 |
| Program Memory Size | 20KB (20K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | - |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 44-TQFP |
| Supplier Device Package | 44-TQFP (10x10) |
| Base Product Number | AT89C55 |
