| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89LP51-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 36 | 4KB (4K x 8) | FLASH | - | 256 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89LP52-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 36 | 8KB (8K x 8) | FLASH | - | 256 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89LP51RC2-20AU | 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-TQFP | |
| AT89LP51RD2-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | EBI/EMI, I²C, SPI, UART/USART | 40 | 64KB (64K x 8) | FLASH | - | 2.25K x 8 | 2.4 V ~ 5.5 V | A/D 7x10b | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89LP3240-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | I²C, SPI, UART/USART | 38 | 32KB (32K x 8) | FLASH | 8K x 8 | 4.25K x 8 | 2.4 V ~ 3.6 V | A/D 8x10b | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89LP51IC2-20AU | 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-TQFP | |
| AT89LP51ED2-20AU | 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-TQFP | |
| AT89LP51ID2-20AU | 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-TQFP | |
| AT89LP6440-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | I²C, SPI, UART/USART | 38 | 64KB (64K x 8) | FLASH | 8K x 8 | 4.25K x 8 | 2.4 V ~ 3.6 V | A/D 8x10b | Internal | -40°C ~ 85°C | 44-TQFP |
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