| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT89C55WD-24PU | ATMEL CORP | 8051 | 8-Bit | 24MHz | UART/USART | 32 | 20KB (20K x 8) | FLASH | - | 256 x 8 | 4.5 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 40-DIP (0.600, 15.24mm) | |
| AT89C2051-12SU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 2KB (2K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89C4051-12SU | ATMEL CORP | 8051 | 8-Bit | 12MHz | UART/USART | 15 | 4KB (4K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 6 V | - | Internal | -40°C ~ 85°C | 20-SOIC (0.295, 7.50mm Width) | |
| AT89LS51-16PU | ATMEL CORP | 8051 | 8-Bit | 16MHz | UART/USART | 32 | 4KB (4K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 4 V | - | Internal | -40°C ~ 85°C | 40-DIP (0.600, 15.24mm) | |
| AT89LS51-16AU | ATMEL CORP | 8051 | 8-Bit | 16MHz | UART/USART | 32 | 4KB (4K x 8) | FLASH | - | 128 x 8 | 2.7 V ~ 4 V | - | Internal | -40°C ~ 85°C | 44-TQFP | |
| AT89C5115-SISUM | ATMEL CORP | 80C51 | 8-Bit | 40MHz | UART/USART | 20 | 16KB (16K x 8) | FLASH | 2K x 8 | 512 x 8 | 3 V ~ 5.5 V | A/D 8x10b | External | -40°C ~ 85°C | 28-LCC (J-Lead) | |
| AT89C51AC2-SLSUM | ATMEL CORP | 80C51 | 8-Bit | 40MHz | UART/USART | 34 | 32KB (32K x 8) | FLASH | 2K x 8 | 1.25K x 8 | 3 V ~ 5.5 V | A/D 8x10b | External | -40°C ~ 85°C | 44-LCC (J-Lead) | |
| AT80C51RD2-RLRUM | ATMEL CORP | 80C51 | 8-Bit | 40MHz | UART/USART | 32 | - | ROMless | - | 1K x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 44-LQFP | |
| AT89C51AC3-RLTUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | UART/USART | 36 | 64KB (64K x 8) | FLASH | 2K x 8 | 2.25K x 8 | 3 V ~ 5.5 V | A/D 8x10b | External | -40°C ~ 85°C | 44-LQFP | |
| AT89C51AC3-SLSUM | ATMEL CORP | 80C51 | 8-Bit | 60MHz | UART/USART | 36 | 64KB (64K x 8) | FLASH | 2K x 8 | 2.25K x 8 | 3 V ~ 5.5 V | A/D 8x10b | External | -40°C ~ 85°C | 44-LCC (J-Lead) |
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