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AT89S52-24AU

MCHPAT89S52-24AU

Microchip Technology
8-bit Microcontrollers - MCU 8kB Flash 256B RAM 33MHz 4.0V-5.5V
4,077 in stock
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Overview

The AT89S52-24AU is a low-power, high-performance 8-bit CMOS microcontroller based on the classic 8051 architecture. It features 8kB of In-System Programmable (ISP) Flash memory and 256 bytes of internal RAM, operating at speeds up to 24MHz. This device provides a highly flexible and cost-effective solution for many embedded control applications that require a robust 5V logic level.

Why Choose This Part

The primary advantage is its In-System Programming (ISP) capability, which allows the software to be updated without removing the chip from the circuit. It offers 32 programmable I/O lines and three 16-bit timer/counters, providing versatile interfacing options. The wide 4.0V to 5.5V operating range makes it highly compatible with standard 5V logic systems.

Applications

Industrial Control Systems
Used in PLC modules, sensor interfaces, and factory automation equipment where 5V logic and high noise immunity are required.
Legacy System Retrofitting
Ideal for maintaining or upgrading existing 8051-based hardware designs without significant software architectural changes.
Simple Consumer Appliances
Manages user interfaces, timers, and basic control logic in white goods and small appliances.
Educational Tools
A standard platform for teaching microcontroller architecture and assembly language programming due to its straightforward instruction set.

Key Specifications

Speed 24MHz
RAM Size 256 x 8
Core Size 8-Bit
Peripherals WDT
Connectivity UART/USART
Mounting Type Surface Mount
Number of I/O 32
Core Processor 8051
Package / Case 44-TQFP
Oscillator Type Internal
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 44-TQFP (10x10)
Voltage - Supply (Vcc/Vdd) 4V ~ 5.5V

Getting Started

To begin development, use a standard 8051 compiler such as Keil C51 or SDCC. Programming the Flash memory is achieved via the SPI-based ISP interface using a hardware programmer like the USBASP or Microchip's AT89ISP cable. Hardware prototyping is best performed on the 44-pin TQFP footprint using a breakout board or a dedicated 8051 development kit.

AT89S52-24 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
AT89S52-24AU (this part) TQFP-44 4,077
AT89S52-24PU DIP-40 4,266
AT89S52-24JU LCC-44 755
Also available as: AT89S52-24AUR

Also Consider

AT89S52-24PU MCHPMicrochip Technology - This is the 40-pin DIP version of the same microcontroller, making it easier for breadboard prototyping and through-hole assembly.
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