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AT89S52-24PU

MCHPAT89S52-24PU

Microchip Technology
8051 89S Microcontroller IC 8-Bit 24MHz 8KB (8K x 8) FLASH 40-PDIP
Active4,266 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The AT89S52-24PU is a low-power, high-performance 8-bit CMOS microcontroller featuring 8KB of In-System Programmable (ISP) flash memory. Based on the industry-standard 80C51 architecture, it operates at a maximum clock frequency of 24MHz and includes 256 bytes of RAM. Its 40-pin PDIP package and 5V operation make it a staple for legacy industrial controls and educational prototyping.

Why Choose This Part

This MCU offers In-System Programming (ISP), allowing the flash memory to be reprogrammed without removing the chip from the circuit. It features 32 programmable I/O lines, three 16-bit timer/counters, and a full duplex UART serial channel, providing a flexible feature set for basic 8-bit applications.

Applications

Industrial Control Systems
Reliable 8-bit processing for sequence control and monitoring in legacy industrial hardware.
Educational Prototyping
The 40-pin DIP package and straightforward 8051 architecture make it ideal for teaching embedded systems on breadboards.
Consumer Electronics
Suitable for simple logic tasks in appliances and consumer goods requiring a robust, through-hole MCU.
Legacy System Maintenance
Drop-in replacement for older MCS-51 compatible chips in existing circuit designs.

Key Specifications

Speed 24MHz
RAM Size 256 x 8
Core Size 8-Bit
Peripherals WDT
Connectivity UART/USART
Mounting Type Through Hole
Number of I/O 32
Core Processor 8051
Package / Case 40-DIP (0.600", 15.24mm)
Oscillator Type Internal
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 40-PDIP
Voltage - Supply (Vcc/Vdd) 4V ~ 5.5V

Getting Started

To program the AT89S52-24PU, use an ISP programmer compatible with the 8051 family, such as the USBasp or specialized AT89S programmers. Development is typically done using the Keil C51 development tools or the open-source SDCC (Small Device C Compiler). Since it is a 40-pin DIP, it can be easily integrated into a breadboard with a 12MHz or 24MHz crystal and two 33pF capacitors.

AT89S52-24 Family

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

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

Also Consider

AT89S51-24PU MCHPMicrochip Technology - A smaller 4KB flash version of the same family for simpler code requirements.
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