| Part Number | AT89C51ID2-RLTIM | AT89C51ID2-RLRIM | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Core Processor | 80C51 | 80C51 | 
| Core Size | 8-Bit | 8-Bit | 
| Speed | 60MHz | 60MHz | 
| Connectivity | I²C, SPI, UART/USART | I²C, SPI, UART/USART | 
| Peripherals | POR, PWM, WDT | POR, PWM, WDT | 
| Number of I/O | 34 | 34 | 
| Program Memory Size | 64KB (64K x 8) | 64KB (64K x 8) | 
| Program Memory Type | Flash | Flash | 
| EEPROM Size | 2K x 8 | 2K x 8 | 
| RAM Size | 2K x 8 | 2K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 
| Data Converters | - | - | 
| Oscillator Type | External | External | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 44-LQFP | 44-LQFP | 
| Supplier Device Package | 44-VQFP (10x10) | 44-VQFP (10x10) |