AT89C4051 product image


Microcontrollers - MCU
ATMEL Corporation


The  AT89C4051   is a low-voltage, high-performance CMOS 8-bit microcontroller with4K bytes of Flash programmable and erasable read-only memory. The device is man-ufactured using Atmel’s high-density nonvolatile memory technology and iscompatible with the industry-standard MCS-51 instruction set. By combining a versa-tile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C4051 is a powerfulmicrocontroller which provides a highly-flexible and cost-effective solution to manyembedded control applications.The AT89C4051 provides the following standard features: 4K bytes of Flash,128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level inter-rupt architecture, a full duplex serial port, a precision analog comparator, on-chiposcillator and clock circuitry. In addition, the AT89C4051 is designed with static logicfor operation down to zero frequency and supports two software-selectable powersaving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters,serial port and interrupt system to continue functioning. The power-down mode savesthe RAM contents but freezes the oscillator disabling all other chip functions until thenext hardware reset.


AT89C4051 Features


•  Compatible with MCS®51 Products
•  4K Bytes of Reprogrammable Flash Memory
   – Endurance: 1,000 Write/Erase Cycles
•  2.7V to 6V Operating Range
•  Fully Static Operation: 0 Hz to 24 MHz
•  Two-level Program Memory Lock
•  128 x 8-bit Internal RAM
•  15 Programmable I/O Lines
•  Two 16-bit Timer/Counters
•  Six Interrupt Sources
•  Programmable Serial UART Channel

Data Bus Width8 bit
Maximum Clock Frequency24 MHz
Program Memory Size128 B
Data RAM Size128 B
On-Chip ADCNo
Operating Supply Voltage2.7 V to 6 V
Maximum Operating Temperature+ 85 C
Package / CaseSOIC
Mounting StyleSMD/SMT
AT89C4051 Replacement Parts
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