| Part Numbers | Manufacturer Name | Datasheet | Core Processor | Core Size | Speed | Connectivity | RAM Size | Number of I/O | Program Memory Size | Program Memory Type | EEPROM Size | Voltage - Supply (Vcc/Vdd) | Data Converters | Oscillator Type | Operating Temperature | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HT83C51 | HONEYWELL MICROELECTRONICS AND PRECISION SENSORS | MCS 51 | 8-Bit | 16MHz | EBI/EMI, UART/USART | 32 | 8KB (8K x 8) | Mask ROM | - | 256 x 8 | 4.5 V ~ 5.5 V | - | Internal | -55°C ~ 225°C | 40-CDIP (0.600, 15.24mm) | |
| EG87C51FA1SF76 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | 8KB (8K x 8) | OTP | - | 256 x 8 | 4.5 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-QFP | |
| EE87C51RB1 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | 16KB (16K x 8) | OTP | - | 512 x 8 | 4 V ~ 6 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| EE80C51FA24SF88 | INTEL CORP | MCS 51 | 8-Bit | 24MHz | SIO | 32 | - | ROMless | - | 256 x 8 | 4.5 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| S80C51RA1 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | - | ROMless | - | 512 x 8 | 4 V ~ 6 V | - | External | 0°C ~ 70°C | 44-QFP | |
| S87C521SF76 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | 8KB (8K x 8) | OTP | - | 256 x 8 | 4 V ~ 6 V | - | External | 0°C ~ 70°C | 44-QFP | |
| TS80C51RA1 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | - | ROMless | - | 512 x 8 | 4 V ~ 6 V | - | External | -40°C ~ 85°C | 44-QFP | |
| S80C51RA24 | INTEL CORP | MCS 51 | 8-Bit | 24MHz | SIO | 32 | - | ROMless | - | 512 x 8 | 4.5 V ~ 5.5 V | - | External | 0°C ~ 70°C | 44-QFP | |
| TS80C51RA24 | INTEL CORP | MCS 51 | 8-Bit | 24MHz | SIO | 32 | - | ROMless | - | 512 x 8 | 4.5 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-QFP | |
| S87C51RC1 | INTEL CORP | MCS 51 | 8-Bit | 16MHz | SIO | 32 | 32KB (32K x 8) | OTP | - | 512 x 8 | 4 V ~ 6 V | - | External | 0°C ~ 70°C | 44-QFP |
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