Product Summary
The AT89C51RD2 is a high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. It contains a 64-Kbyte Flash memory block for code and for data.
Parametrics
AT89C51RD2 absolute maximum ratings: (1)I = industrial: -40℃ to 85℃; (2)Storage Temperature: -65℃ to + 150℃; (3)Voltage on VCC to VSS: -0.5V to + 6.5V; (4)VVoltage on Any Pin to VSS: -0.5V to VCC + 0.5V; (5)Power Dissipation: 1 W.
Features
AT89C51RD2 features: (1)80C52 Compatible: 8051 Instruction Compatible, Six 8-bit I/O Ports (64 Pins or 68 Pins Versions), Four 8-bit I/O Ports (44 Pins Version), Three 16-bit Timer/Counters, 256 Bytes Scratch Pad RAM, 9 Interrupt Sources with 4 Priority Levels; (2)Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply; (3)ISP (In-System Programming) Using Standard VCC Power Supply; (4)2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader.
Diagrams

| Image | Part No | Mfg | Description | ![]()  | 
                            Pricing (USD)  | 
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                            ![]() AT89C51RD2  | 
                            ![]() Other  | 
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                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
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![]()  | 
                            ![]() AT89C51RD2-RDTUM  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) Microcontroller  | 
                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
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![]()  | 
                            ![]() AT89C51RD2-RLTUM  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) C51RD2 64K FLASH 3-5.5V Ind  | 
                            ![]() Data Sheet  | 
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![]()  | 
                            ![]() AT89C51RD2-RLRUM  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) C51RD2 32K FLASH 5V Com  | 
                            ![]() Data Sheet  | 
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![]()  | 
                            ![]() AT89C51RD2-RLRIM  | 
                            ![]()  | 
                            ![]() IC MCU FLASH 8051 EEP 64K 44VQFP  | 
                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
                            	 | 
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![]()  | 
                            ![]() AT89C51RD2-RLTIM  | 
                            ![]()  | 
                            ![]() IC 8051 MCU FLASH 64K 44VQFP  | 
                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
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![]()  | 
                            ![]() AT89C51RD2-SLSUM  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) 64kB Flash 2048B RAM 2.7V-5.5V  | 
                            ![]() Data Sheet  | 
                            ![]() 
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![]()  | 
                            ![]() AT89C51RD2-SLRUM  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) C51RD2 64K FLASH 3-5.5V  | 
                            ![]() Data Sheet  | 
                            ![]() 
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 (China (Mainland)) 
                         
                        
                                    





