| 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 | |
| AT89LP4052-20XU | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 15 | 4KB (4K x 8) | FLASH | - | 256 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 20-TSSOP (0.173, 4.40mm Width) | |
| AT89LP428-20PU | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 30 | 4KB (4K x 8) | FLASH | 512 x 8 | 768 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 28-DIP (0.300, 7.62mm) | |
| AT89LP428-20JU | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 30 | 4KB (4K x 8) | FLASH | 512 x 8 | 768 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-LCC (J-Lead) | |
| AT89LP428-20AU | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 30 | 4KB (4K x 8) | FLASH | 512 x 8 | 768 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP | |
| AT89LP51-20PU | 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 | 40-DIP (0.600, 15.24mm) | |
| AT89LP51-20JU | 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-LCC (J-Lead) | |
| AT89LP51-20MU | 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-VFQFN Exposed Pad | |
| AT89LP428-20MH | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 30 | 4KB (4K x 8) | FLASH | 512 x 8 | 768 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| AT89LP4052-20SU | ATMEL CORP | 8051 | 8-Bit | 20MHz | SPI, UART/USART | 15 | 4KB (4K x 8) | FLASH | - | 256 x 8 | 2.4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) |
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