Description

The 89C2051-24U is an 8-bit microcontroller based on the popular 8051 architecture, widely used in embedded control systems, automation projects, instrumentation, and educational microcontroller development. Manufactured by Atmel (Microchip), this compact 20-pin MCU offers 2KB Flash memory, 128 bytes of RAM, 15 I/O lines, two 16-bit timers, UART serial interface, and supports up to 24MHz operating frequency. With low power consumption and a simple programming model, the 89C2051 remains a reliable choice for legacy designs, industrial controllers, and small embedded applications.

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Specifications

• Architecture: 8-bit 8051 Core
• Operating Frequency: Up to 24MHz
• Flash Memory: 2KB
• RAM: 128 bytes
• I/O Pins: 15 programmable I/O lines
• Timers: Two 16-bit timers/counters
• Communication: UART Serial Interface
• Package: 20-pin DIP (89C2051-24PU equivalent depending on stock)
• Operating Voltage: 4.0V 5.5V

Applications

• Embedded control systems
• Industrial automation projects
• Legacy 8051-based designs
• Educational microcontroller development
• Signal processing & small control tasks

Usage Notes

• Requires an 8051-compatible programmer for flashing.
• Can operate with external oscillator for stable timing.
• Check pinout compatibility before replacing legacy ICs.

Package Includes

• 1 89C2051-24U Microcontroller IC