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| PartNumber | TSC87251G2D-24IBR | TSC87251G2D-24IA | TSC87251G2D-24IB |
| Description | IC MCU 8/16BIT 32KB OTP 44PLCC | IC MCU 8/16BIT 32KB OTP 40PDIL | IC MCU 8/16BIT 32KB OTP 44PLCC |
| Manufacturer | Atmel | Atmel | Atmel |
| Product Category | Embedded - Microcontrollers | Embedded - Microcontrollers | IC Chips |
| Series | 8x251 | 8x251 | 8x251 |
| Packaging | Tape & Reel (TR) | Tube | Tube |
| Package Case | 44-LCC (J-Lead) | 40-DIP (0.600", 15.24mm) | 44-LCC (J-Lead) |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | 44-PLCC (16.59x16.59) | 40-PDIL | 44-PLCC (16.59x16.59) |
| Number of I O | 32 | 32 | 32 |
| Speed | 24MHz | 24MHz | 24MHz |
| EEPROM Size | - | - | - |
| Core Processor | C251 | C251 | C251 |
| RAM Size | 1K x 8 | 1K x 8 | 1K x 8 |
| Program Memory Type | OTP | OTP | OTP |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT | POR, PWM, WDT |
| Connectivity | EBI/EMI, I2C, Microwire, SPI, UART/USART | EBI/EMI, I2C, Microwire, SPI, UART/USART | EBI/EMI, I2C, Microwire, SPI, UART/USART |
| Voltage Supply Vcc Vdd | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V |
| Core Size | 8/16-Bit | 8/16-Bit | 8/16-Bit |
| Program Memory Size | 32KB (32K x 8) | 32KB (32K x 8) | 32KB (32K x 8) |
| Data Converters | - | - | - |
| Oscillator Type | Internal | Internal | Internal |