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AT89S51-24PU

MCHPAT89S51-24PU

Microchip Technology
8051 89S Microcontroller IC 8-Bit 24MHz 4KB (4K x 8) FLASH 40-PDIP
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Overview

The Microchip AT89S51-24PU is an 8-bit microcontroller built on the classic 8051 architecture, offering 4KB of In-System Programmable (ISP) Flash memory and 128 bytes of RAM. It operates at speeds up to 24MHz and is designed for through-hole mounting in a 40-pin PDIP package. This MCU provides a robust, proven platform for various embedded control applications.

Why Choose This Part

Engineers benefit from the AT89S51-24PU's proven 8051 architecture, which offers a large ecosystem of development tools and extensive documentation. The In-System Programmable Flash memory simplifies firmware updates and prototyping. Its fully static operation and low-power modes make it suitable for applications requiring power efficiency.

Applications

Industrial Control Systems
Suitable for basic industrial control and automation tasks due to its robust 8051 core and 32 I/O lines for interfacing with sensors and actuators.
Educational and Hobbyist Projects
The 40-pin PDIP package and straightforward 8051 architecture make it an accessible choice for learning microcontroller programming and developing simple electronic projects.
Legacy System Maintenance and Upgrade
Ideal for replacing or maintaining existing systems that rely on the widely deployed 80C51 family, ensuring compatibility and leveraging existing codebases.
Embedded Control Units
Can be used as a central control unit in small embedded systems requiring modest processing power, such as alarm systems, timers, or simple data loggers.
Peripheral Interfacing
With its UART serial channel and 32 programmable I/O lines, it is well-suited for communicating with various peripherals and external devices.

Key Specifications

Speed 24MHz
RAM Size 128 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 4KB (4K 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 get started with the AT89S51-24PU, engineers typically use an 8051-compatible IDE such as Keil uVision along with a suitable programmer for ISP Flash memory. The through-hole PDIP package allows for easy prototyping on breadboards or custom PCBs. Numerous online tutorials and example projects are available for the 8051 architecture.

Also Consider

AT89S52-24PU MCHPMicrochip Technology - This is a direct upgrade with 8KB of Flash memory and 256 bytes of RAM, offering more program and data space while maintaining 8051 compatibility.
PIC16F877A-I/P MCHPMicrochip Technology - A popular 8-bit PIC microcontroller in a 40-pin PDIP, offering an alternative architecture with a different peripheral set, including ADC and PWM capabilities.
ATMEGA328P-PU MCHPMicrochip Technology - Known for its use in Arduino boards, this 8-bit AVR microcontroller in a 28-pin PDIP offers a different instruction set and more modern peripherals for general-purpose applications.
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