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| PartNumber | S87C51RA24 | S87C51RB1 | S87C51RC1 |
| Description | IC MCU 8BIT 8KB OTP 44QFP | IC MCU 8BIT 16KB OTP 44QFP | IC MCU 8BIT 32KB OTP 44QFP |
| Manufacturer | Intel | Intel | Intel |
| Product Category | Embedded - Microcontrollers | Embedded - Microcontrollers | Embedded - Microcontrollers |
| Series | 87C | 87C | 87C |
| Packaging | Tray | Tray | Tray |
| Package Case | 44-QFP | 44-QFP | 44-QFP |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Supplier Device Package | - | - | - |
| Number of I O | 32 | 32 | 32 |
| Speed | 24MHz | 16MHz | 16MHz |
| EEPROM Size | - | - | - |
| Core Processor | MCS 51 | MCS 51 | MCS 51 |
| RAM Size | 512 x 8 | 512 x 8 | 512 x 8 |
| Program Memory Type | OTP | OTP | OTP |
| Peripherals | WDT | WDT | WDT |
| Connectivity | SIO | SIO | SIO |
| Voltage Supply Vcc Vdd | 4.5 V ~ 5.5 V | 4 V ~ 6 V | 4 V ~ 6 V |
| Core Size | 8-Bit | 8-Bit | 8-Bit |
| Program Memory Size | 8KB (8K x 8) | 16KB (16K x 8) | 32KB (32K x 8) |
| Data Converters | - | - | - |
| Oscillator Type | External | External | External |