| Picture | ES Part No. | Part No | Stock | Price | Datasheet | Pb Free | RoHS | Description | Vendor | Case Style | Number of I/O | Core Processor | Program Memory Size (Bytes) | Non-Volatile Memory Size(Bytes-Data EE,Data Flash) | RAM Size (Bytes) | Package / Case | Mounting Type | ADC Bits/Channel | Communication | Core Sizes (Bits) | Max. Speed |
| | | | | | | | | | | | | | | | | | | | | |
 | 0065-0212-3 | AT89C51AC2-RLTUM | 15 | 410.90 |  | PB-Free | RoHS | 8-Bit MCS-51 MCU Flash 32KBytes,RAM 1256 Bytes EEPROM 2KBytes,10-Bit A/D with 8 Multiplex Input | ATMEL | QFP | 34 | MCS51 | 32K | 2K | 1.2K | QFP-44 | Surface Mount | 10/8 | 1 UART | 8 | 40MHz |
 | 0065-0238-9 | AT89C51ED2-SLSUM | 114 | 190.90 | | PB-Free | | 8-Bit MCS-51 MCU Flash 64KBytes,RAM 2048 Bytes EEPROM 2048 Bytes,60MHz | ATMEL | LCC | 32 | MCS51 | 64K | 2K | 2K | PLCC-44 | Surface Mount | - | 1 USART,1 SPI | 8 | 60MHz |
 | 0065-0251-6 | AT89C51RC-24PU | 302 | 258.40 | | PB-Free | | 8-Bit MCS-51 MCU Flash 32KBytes,RAM 512Bytes,24MHz | ATMEL | DIP | 32 | MCS51 | 32K | - | 512 | PDIP-40 | Through Hole | - | 1 UART | 8 | 24MHz |
| 0035-2383-3 | AT89S8253-24JU-T | 0 | 220.60 | | PB-Free | | 8-Bit MCS-51 MCU ISP Flash 12KBytes, 24MHz RAM 256 Bytes,EEPROM 2KBytes | MICROCHIP | LCC | 32 | MCS51 | 12K | 2K | 256 | PLCC-44 | Surface Mount | - | 1 UART,1 SPI | 8 | 24MHz |
| 0035-2650-1 | AT89C55WD-24AU | 300 | 163.00 | | PB-Free | RoHS | 8-Bit MCS-51 MCU, Flash 20KBytes, RAM 256Bytes, Speed 24MHz | MICROCHIP | QFP | 32 | MCS51 | 20K | - | 256 | QFP-44 | Surface Mount | - | 1 UART | 8 | 24MHz |
| 0035-2613-4 | AT89C51ED2T-RLTUM | 0 | 403.00 | | PB-Free | RoHS | 8-Bit MCS-51 MCU, Flash 64KBytes, RAM 2048Bytes, EEPROM 2048Bytes, Speed 60MHz | MICROCHIP | QFP | 34 | MCS51 | 64K | 2K | 2K | QFP-44 | Surface Mount | - | 1 UART,1 SPI | 8 | 60MHz |
| 0035-2288-9 | AT89C51AC3-RLTUM | 0 | 541.80 | | PB-Free | RoHS | 8-Bit MCS-51 MCU Flash 64 KBytes,RAM 256 Bytes EEPROM 2KBytes,60MHz,10-Bit A/D Converter | MICROCHIP | QFP | 36 | MCS51 | 64K | 2K | 256 | QFP-44 | Surface Mount | 10/8 | 1 UART,1 SPI | 8 | 60MHz |
| 0035-1342-2 | SST89E516RD-40-C-PIE | 0 | 133.90 | | PB-Free | RoHS | 8-Bit 8051 MCU Flash 72KBytes,RAM 1024 Bytes EEPROM 64KBytes,Speed 40MHz UART,SPI Interface,Brown-out Detection | MICROCHIP | DIP | 32 | MCS51 | 72K | 64 | 1K | PDIP-40 | Through Hole | - | 1 UART,1 SPI | 8 | 40MHz |
 | 0127-0058-8 | ADUC834BS | 50 | 214.80 | | | | 8-Bit MCS-51 MCU, Flash 62KBytes, RAM 2.25KBytes EEPROM 4KBytes, Speed 12.58MHz, Dual 16-Bit/24-Bit Sigma-Delta ADCs | ANALOG DEVICES | QFP | 34 | MCS51 | 62K | 4K | 2.25K | MQFP-52 | Surface Mount | 16/3,24/4 | 1 UART,1 SPI,1 I2C | 8 | 12.58MHz |
| 0127-0059-1 | ADUC847BS32-5 | 1 | 102.30 | | | | 8-Bit MCS51 MCU, Flash 32KBytes, RAM 2.25KBytes, EEPROM 4KBytes, Speed 12.58MHz, Multichannel 24-Bit Sigma-Delta ADCs | ANALOG DEVICES | QFP | 34 | MCS51 | 32K | 4K | 2.25K | MQFP-52 | Surface Mount | 24/10 | 1 UART,1 SPI,1 I2C | 8 | 12.58MHz |
 | 0227-0022-7 | SAF-XC878M-16FFI 5V AC | 444 | 99.53 | | PB-Free | RoHS | 8-Bit XC800 MCU Flash 64KBytes,RAM 3.25KBytes, 26.67MHz | INFINEON | QFP | 40 | MCS51 | 64K | - | 3.25K | LQFP-64 | Surface Mount | 10/8 | 2 UART,1 SSC | 8 | 26.67MHz |
 | 0227-0033-7 | SAK-XC866-4FRI BE | 3 | 166.60 | | PB-Free | RoHS | 8-Bit XC800 MCU Flash 16KBytes,RAM 768 Bytes 80MHz,10-Bit A/D 8-Channel | INFINEON | SOIC | 27 | MCS51 | 16K | - | 768 | TSSOP-38 | Surface Mount | 10/8 | 1 UART,1 SPI | 8 | 86MHz |
 | 0527-0005-5 | C8051F340-GQ | 9 | 337.20 | | PB-Free | RoHS | 8-Bit MCS-51 MCU USB Flash 64KBytes,RAM 4352 Bytes 48MHz,10-Bit ADC | SILICON LABS | QFP | 40 | MCS51 | 64K | - | 4.25K | TQFP-48 | Surface Mount | 10/17 | 2 UART,1 SPI,1 USB,1 SMBus | 8 | 48MHz |
 | 0398-0059-2 | MRT-CY8C27143-24P | 1 | 171.12 | | | | 8-Bit MCU M8C Flash 16KBytes,RAM 256 Bytes,24MHz PSoC Programmable System-on-Chip | MICRO RESEARCH TECH. | DIP | 6 | M8C | 16K | 2K | 256 | PDIP-8 | Through Hole | 14/4 | 2 UART,2 SPI,1 I2C | 8 | 24MHz |
 | 0211-0010-7 | MRT-CY8C27443-24P | 7 | 205.00 | | | | 8-Bit M8C MCU Flash 16KBytes,RAM 256 Bytes 24MHz,PSoC Mixed Signal Array | CYPRESS | DIP | 24 | M8C | 16K | 2K | 256 | PDIP-28 | Through Hole | 14/4 | 2 UART,2 SPI,1 I2C | 8 | 24MHz |
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