# Microchip AT89C2051, 24PU, 8 bit

> The Microchip AT89C2051-24PU is an 8-bit microcontroller with an 8051 core, operating at up to 24 MHz. It features 2KB Flash memory and 128B RAM, 15 configurable I/O pins, two 16-bit timers/counters, a 4-channel A/D converter, and UART serial communication. Supply voltage 2.7V-5.5VDC, 24-pin package (24PU).

- Page: https://sigmanortec.ro/en/microchip-at89c2051-24pu-8-bit
- Price: 9.95 RON
- Availability: In stock; 1-2 zile
- Reference: 9678 · EAN: 5947464799260
- Category: Electronic components > Integrated Circuits (IC)
- Package (shipping data): 0.003 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

8-bit microcontroller with 8051 core, ideal for automation and compact embedded applications. Runs up to 24 MHz, includes 2KB Flash and 128B RAM for programs and data, offers 15 IO pins for fast interfacing and UART serial communication, operates from 2.7V to 5.5V for flexible integration into projects.
AT89C2051-24PU is an 8-bit microcontroller integrated circuit from the AT89 series, developed by the Atmel company, which offers a versatile solution for controlling electronic devices and developing embedded applications. This microcontroller offers an excellent combination of performance, flexibility and energy efficiency, which makes it suitable for a wide range of applications.
The AT89C2051-24PU has an architecture based on an 8051 core, an 8-bit microcontroller known for its efficiency in integrated applications.
The microcontroller operates at a maximum frequency of 24 MHz, providing enough processing power for a variety of tasks.
It has 2KB of Flash memory for the program, which allows the application code to be stored, and 128B of RAM memory for temporary data storage.
It has two 16-bit timers/counters, which can be used to generate timed signals or perform precise time measurements.
It has 15 configurable I/O pins, which can be used to connect and control various devices and peripherals.
The microcontroller has a 4-channel analog-digital converter, which allows the conversion of analog signals into digital format.
It supports serial communication through the UART serial port.
It has various protection and security mechanisms to prevent unauthorized access to programmable memory and other critical resources.
It works at supply voltages from 2.7V to 5.5V, which gives it additional flexibility in the design of applications.
Specifications:
Supply Voltage: 2.7V - 5.5VDC
Architecture: 8-bit 8051 core
Clock Frequency: Maximum 24 MHz
Memory: 2KB Flash, 128B RAM
Timers/Counters: Two 16-bit
I/O ports: 15 configurable pins
A/D converter: 4 channels
Serial Communication: UART port
Number of pins: 24
Pinouts: