| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89LP51RB2-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 24KB (24K x 8) | FLASH | - | 1.375K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89LP51RB2-20AAU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 24KB (24K x 8) | FLASH | - | 1.375K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89LP51RC2-20AAU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 32KB (32K x 8) | FLASH | - | 1.375K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89LP51IC2-20AAU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 32KB (32K x 8) | FLASH | - | 1.375K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89LP51ID2-20AAU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 64KB (64K x 8) | FLASH | 4K x 8 | 2.25K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89C51RB2-RLTUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | SPI, UART/USART | 32 | 16KB (16K x 8) | FLASH | - | 1.25K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LQFP | |
| AT89C51RB2-RLTUL | ATMEL CORP | 80C51 | 8-Bit | 40MHz | SPI, UART/USART | 32 | 16KB (16K x 8) | FLASH | - | 1.25K x 8 | 2.7 V ~ 3.6 V | - | External | -40°C ~ 85°C | 44-LQFP | |
| AT89C51IC2-RLTIL | ATMEL CORP | 80C51 | 8-Bit | 40MHz | I²C, SPI, UART/USART | 34 | 32KB (32K x 8) | FLASH | - | 1.25K x 8 | 2.7 V ~ 3.6 V | - | External | -40°C ~ 85°C | 44-LQFP | |
| AT89C51IC2-RLTUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | I²C, SPI, UART/USART | 34 | 32KB (32K x 8) | FLASH | - | 1.25K x 8 | 2.7 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-LQFP | |
| AT89C51IC2-RLTUL | ATMEL CORP | 80C51 | 8-Bit | 60MHz | I²C, SPI, UART/USART | 34 | 32KB (32K x 8) | FLASH | - | 1.25K x 8 | 2.7 V ~ 3.6 V | - | External | -40°C ~ 85°C | 44-LQFP |
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