AT89S52-24JI

Microcontrollers Overview

The AT89S52-24JI is a low-power, high-performance CMOS 8-bit microcontroller manufactured by Microchip Technology. It features an 8K-byte In-System Programmable (ISP) Flash memory with 10,000 write/erase cycle endurance and 256 bytes of internal RAM. The device operates within a 4.0V to 5.5V voltage range and supports fully static operation from 0 Hz to 33 MHz. It includes three 16-bit timer/counters, eight interrupt sources, and a full-duplex UART serial channel. The component utilizes a 44-lead PLCC package.

Microcontrollers Feature Summary

• Compatible with MCS-51 instruction set and pinout
• Three-level program memory lock for security
• Flexible ISP programming supporting byte and page modes
• Low-power idle and power-down modes with interrupt recovery

Microcontrollers Applications

• Embedded control systems requiring in-system reprogramming
• Industrial applications needing robust watchdog timer functionality
• Serial communication interfaces utilizing the full-duplex UART

Microcontrollers Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 44-lead PLCC configuration. Confirm that the supply voltage matches the required 4.0V to 5.5V operating range for your application design.

Microcontrollers Selection Notes

Select this component when an industry-standard 80C51 architecture is required with integrated flash memory. It is suitable for designs needing multiple timer/counters and serial communication capabilities without external memory expansion. Consider the PLCC package constraints regarding board space and thermal management.

Microcontrollers Part Context

This microcontroller belongs to the AT89S series, which integrates versatile 8-bit CPUs with on-chip programmable Flash. The series provides cost-effective solutions for embedded control applications by combining nonvolatile memory with standard 80C51 peripherals on a single monolithic chip.

Microcontrollers Replacement Considerations

AT89S52-24PU

Microcontrollers FAQ

How does the Watchdog Timer function upon overflow?

When the Watchdog Timer overflows, it drives an output RESET HIGH pulse at the RST pin to reset the device.

What is the purpose of the Dual Data Pointer feature?

The Dual Data Pointer facilitates accessing both internal and external data memory by providing two banks of 16-bit Data Pointer Registers.