| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89C51RC-24AU | ATMEL CORP | 8051 | 8-Bit | 24MHz | SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 512 x 8 | 4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89C51RC-24AC | ATMEL CORP | 8051 | 8-Bit | 24MHz | SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 512 x 8 | 4 V ~ 5.5 V | - | Internal | 0°C ~ 70°C | 44-TQFP | |
| AT89C51RC-24AI | ATMEL CORP | 8051 | 8-Bit | 24MHz | SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 512 x 8 | 4 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| DS89C440-ENG | MAXIM INTEGRATED PRODUCTS INC | 8051 | 8-Bit | 25MHz | EBI/EMI, SIO, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 1K x 8 | 4.5 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-TQFP | |
| DS89C440-ENL | MAXIM INTEGRATED PRODUCTS INC | 8051 | 8-Bit | 33MHz | EBI/EMI, SIO, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 1K x 8 | 4.5 V ~ 5.5 V | - | External | -40°C ~ 85°C | 44-TQFP | |
| P89V51RC2FBC,557 | NXP SEMICONDUCTORS | 8051 | 8-Bit | 40MHz | SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 1K x 8 | 4.5 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| P89LV51RC2FBC,557 | NXP SEMICONDUCTORS | 8051 | 8-Bit | 33MHz | SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 512 x 8 | 2.7 V ~ 3.6 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| P89CV51RC2FBC,557 | NXP SEMICONDUCTORS | 8051 | 8-Bit | 40MHz | EBI/EMI, SPI, UART/USART | 32 | 32KB (32K x 8) | FLASH | - | 1K x 8 | 4.5 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-TQFP |
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