| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89C2051-12SU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 2KB (2K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89C4051-12SU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 4KB (4K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89C2051-12PU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 2KB (2K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-DIP (0.300, 7.62mm) | |
| AT89C4051-12PU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 4KB (4K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-DIP (0.300, 7.62mm) | |
| AT90S1200-12PC | ATMEL CORP | AVR | 8-Bit | 12MHz | SPI | 15 | 1KB (512 x 16) | FLASH | 64 x 8 | - | 4 V ~ 6 V | - | Internal | 0°C ~ 70°C | 20-DIP (0.300, 7.62mm) | |
| AT90S1200-12PI | ATMEL CORP | AVR | 8-Bit | 12MHz | SPI | 15 | 1KB (512 x 16) | FLASH | 64 x 8 | - | 4 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-DIP (0.300, 7.62mm) | |
| AT89C1051-12SC | ATMEL CORP | 8051 | 8-Bit | 12MHz | - | 15 | 1KB (1K x 8) | FLASH | - | 64 x 8 | 2.7 V ~ 6 V | - | Internal | 0°C ~ 70°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89C1051-12SI | ATMEL CORP | 8051 | 8-Bit | 12MHz | - | 15 | 1KB (1K x 8) | FLASH | - | 64 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89C1051U-12PC | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 1KB (1K x 8) | FLASH | - | 64 x 8 | 2.7 V ~ 6 V | - | Internal | 0°C ~ 70°C | 20-DIP (0.300, 7.62mm) | |
| AT89C1051U-12PI | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 1KB (1K x 8) | FLASH | - | 64 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-DIP (0.300, 7.62mm) |
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