| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89C51ED2-SLRUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | 2K x 8 | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51ID2-SLRUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | I²C, SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | 2K x 8 | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51RD2-SLRUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | - | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51RD2-SLSUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | - | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51ED2-SLSUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | 2K x 8 | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51ID2-SLSUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | I²C, SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | 2K x 8 | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51ED2-SLSIM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | 2K x 8 | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT89C51RD2-SLSIM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 34 | 64KB (64K x 8) | FLASH | - | 2K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT80C51ID2-SLSIM | ATMEL CORP | 80C51 | 8-Bit | 20MHz | - | 32 | - | ROMless | - | 2K x 8 | - | - | Internal | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT80C51ID2-SLSIL | ATMEL CORP | 80C51 | 8-Bit | 20MHz | - | 32 | - | ROMless | - | 2K x 8 | - | - | Internal | -40°C ~ 85°C | 44-LCC (J-Lead) |
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