AT89C2051 Microcontroller IC

AT89C2051 Microcontroller IC 

The AT89C2051 is an 8-bit microcontroller from the 8051 family, developed by Atmel (now Microchip Technology). It is a compact and cost-effective version of the standard 8051, designed for small embedded control applications where low pin count and low cost are important.

The microcontroller is based on the 8051 architecture and integrates Flash program memory, RAM, digital I/O ports, timers, and serial communication on a single chip. Its 20-pin package makes it suitable for space-constrained embedded designs.

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Features

• 8-bit 8051-compatible CPU
• Operating voltage: 4.0 V – 5.5 V
• Maximum clock frequency: Up to 24 MHz
• Program memory: 2 KB Flash
• Data memory: 128 bytes RAM
• I/O pins: 15 programmable digital I/O pins
• Timers/Counters:
• Two 16-bit timers
• Communication interfaces:
• Full-duplex UART (serial communication)
• Interrupt system: 6 interrupt sources
• Low-power modes: Idle and Power-down
• On-chip oscillator support
• In-System Programming (ISP)
• Package type: 20-pin DIP / SMD

Applications

• Small embedded control systems
• Consumer electronics
• Simple automation projects
• Sensor-based applications
• Serial communication projects
• Low-cost embedded products
• Educational and training kits