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AT89C2051 Microcontroller – 8-bit 20-Pin CMOS Microcontroller with 2K Flash
AT89C2051 Microcontroller – 8-bit 20-Pin CMOS Microcontroller with 2K Flash
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AT89C2051 Microcontroller – 8-bit 20-Pin CMOS Microcontroller with 2K Flash

₹59.0 Prices include applicable taxes.
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The AT89C2051 is a low-voltage, high-performance 8-bit CMOS microcontroller based on the popular Intel 8051 architecture. It comes with 2K bytes of Flash memory, 128 bytes of RAM, and 15 programmable I/O lines, making it an excellent choice for compact embedded applications. Its small 20-pin DIP package makes it ideal for projects with space constraints while still offering powerful features like two 16-bit timers, UART serial communication, six interrupt sources, and an on-chip oscillator. The AT89C2051 is widely used in consumer electronics, robotics, automation, and student projects due to its simplicity and reliability.

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Product Specifications

Specification Details
CPU 8-bit 8051 compatible
Flash Memory 2K Bytes
RAM 128 Bytes
EEPROM Not available
Operating Voltage 4.0V – 5.5V
I/O Pins 15 programmable I/O lines
Timers/Counters 2 × 16-bit timers/counters
Interrupts 6 interrupt sources with 2 priority levels
Communication Interface Full duplex UART serial port
Oscillator On-chip oscillator and clock circuitry
Package Type 20-pin DIP

Key Features

  • Low-power CMOS 8-bit microcontroller
  • 2K in-system programmable Flash memory
  • 128 bytes on-chip RAM
  • 15 programmable I/O lines
  • Two 16-bit timers/counters
  • Full-duplex UART serial communication
  • 6 interrupt sources
  • On-chip oscillator and clock circuitry
  • Compact 20-pin DIP package
  • Compatible with MCS-51 instruction set

Applications

  • Embedded system projects
  • Robotics and automation
  • Consumer electronics
  • Industrial control systems
  • Smart home devices
  • Student and academic projects
  • Sensor interfacing
  • Portable electronic devices

Inside the Box

  • 1 × AT89C2051 Microcontroller (20-pin DIP package)
  • Anti-static protective packaging

Frequently Asked Questions

Yes, it can be programmed using Arduino as ISP or with dedicated 8051 programmers.

Yes, it is fully compatible with the MCS-51 instruction set, making it easy to use with standard 8051 development tools.

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