Proven 8051 Technology for a Wealth of Embedded Applications

Extensive Product Portfolio Including Pin-to-Pin Compatibility for End-of-Life Competitive Devices

With Atmel's broad range of feature-rich 8-bit microcontrollers (MCUs) based on the 8051 instruction set, you can be assured that your 8051 designs are in good hands. While other suppliers have exited this market, we're committed to extending our roadmap for our proven 8051 MCUs. Whether you're working on legacy, existing or new designs, you’ll get the latest in features and functionality from more than 50 part numbers providing Flash memory ranging from 2KB to 64KB.

Choose pin-to-pin compatible members from our 8051 portfolio to replace end-of-life competitive devices. From 8-bit MCUs based on the low-power single-cycle AT89LP core to MCS-51® industry-standard socket drop-in devices and small-footprint 14/16/20/28-pin derivatives, our devices all feature advanced Flash technologies. Most devices include in-system programming (ISP) for additional usage flexibility. Other options include digital signal processing (DSP) extensions, advanced timer/pulse-width modulation (PWM) peripherals, and CAN and USB interfaces.

Our popular AT89LP family delivers the latest in 8051 technology. Its members provide binary-code level compatibility for 80C51-based applications, along with pin-to-pin compatibility to competitive devices (direct replacements and non-direct replacements). The AT89LP devices dramatically boost performance by a factor of 6 to 12 times—up to 30MIPS. Along with modern features and peripherals, you also get low power consumption for your low-voltage and battery-powered applications. To speed development, download the AT89LP Developer Studio IDE tool, as well as related documentation and software.


Device Family Summary Benefit Applications Technologies Key Parameters

Binary compatibility with existing 8051 products eases upgrades

Single clock cycle per byte fetch

Enhanced efficiency saves power

Battery Management

White Goods

Universal Remote Control

Power Management

Industrial and Motor Control

Single-cycle execution 8051 Architecture

In-system programmable

Interrupt Controllers


A/D converter

High-performance and in-system programming with a rich feature set

Applications that need A/D conversion, pulse width modulation, high speed I/O and counting capabilities such as industrial control, consumer goods, alarms, motor control, and more.

In-system programmable 8051 Architecture

Serial ISP and Parallel programming interfaces

Integrated design provides flexibility Rich feature set Low power consumption improves efficiency

A variety of embedded applications

Reprogrammable Flash 8051 Architecture

Reprogrammable Flash

CAN networking is supported with a broad portfolio of 8051 microcontroller flash technology

Automotive engine control communication

Medical devices


Factory and industrial automation

Maritime environments

8051 Architecture

CAN Controller

USB microcontrollers offer powerful interface options that are ideal for many devices

Flash recorders


Cell phones

8051 Architecture

USB controller

Robust analog interface

Intelligent power management

Lighting control applications

8051 Architecture

Low pin count

A/D Converter


A combination of performance, flexibility, and power efficiency


8051 Architecture

Programmable counter array

XRAM of 1024 bytes

Hardware watchdog timer

Keyboard interface