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| Part Number | AT87C51RC2-RLTUL | AT87C51RC2-RLTUM | AT87C51RD2-RLTUL | AT87C51RB2-RLTUL |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Atmel | Microchip Technology | Atmel |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete |
| Core Processor | 80C51 | 80C51 | 80C51 | 80C51 |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 30/20MHz | 40/20MHz | 30/20MHz | 30/20MHz |
| Connectivity | UART/USART | UART/USART | UART/USART | UART/USART |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT | POR, PWM, WDT | POR, PWM, WDT |
| Number of I/O | 32 | 32 | 32 | 32 |
| Program Memory Size | 32KB (32K x 8) | 32KB (32K x 8) | 64KB (64K x 8) | 16KB (16K x 8) |
| Program Memory Type | OTP | OTP | OTP | OTP |
| EEPROM Size | - | - | - | - |
| RAM Size | 512 x 8 | 512 x 8 | 1K x 8 | 512 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 4.5V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Data Converters | - | - | - | - |
| Oscillator Type | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 44-LQFP | 44-LQFP | 44-LQFP | 44-LQFP |
| Supplier Device Package | 44-VQFP (10x10) | 44-VQFP (10x10) | 44-VQFP (10x10) | 44-VQFP (10x10) |
