AT89C4051 Microcontroller IC

AT89C4051 Microcontroller IC 

The AT89C4051 is an 8-bit microcontroller from the 8051 family, developed by Atmel (now Microchip Technology). It is a low-cost, compact version of the standard 8051, designed for applications where small size and basic control functions are required.

The microcontroller is based on the 8051 architecture and integrates Flash program memory, RAM, digital I/O lines, timers, and serial communication on a single chip. Due to its 20-pin package, it is ideal for space-constrained embedded systems.

Click here to view related products

Features

• 8-bit 8051-compatible CPU
• Operating voltage: 4.0 V – 5.5 V
• Maximum clock frequency: Up to 24 MHz
• Program memory: 4 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
• Package type: 20-pin DIP / SMD

Applications

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