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AT89LP52-20JU

MCHPAT89LP52-20JU

Microchip Technology
8051 89LP Microcontroller IC 8-Bit 20MHz 8KB (8K x 8) FLASH 44-PLCC (16.6x16.6)
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Overview

The AT89LP52-20JU is a high-performance 8-bit microcontroller based on the enhanced 8051 architecture, designed to execute instructions in fewer clock cycles than standard 8051 cores. It features 8KB of In-System Programmable Flash memory and a 20MHz maximum clock speed, providing a modernized path for legacy 8051 designs. The device integrates modern peripherals like PWM and SPI while maintaining compatibility with classic 8051 software.

Why Choose This Part

This microcontroller offers a significant performance boost over traditional 8051s by utilizing a 1-clock per machine cycle architecture in its fast mode. It includes modern features like a 2-cycle hardware multiplier, dual data pointers, and DMA, which are rarely found in standard 8051 variants. The 44-pin PLCC package provides a robust surface-mount solution with high I/O density for space-constrained designs.

Applications

Legacy System Modernization
Updating existing 8051-based industrial controllers to improve execution speed and reduce power consumption without a complete architecture rewrite.
Serial Communication Bridges
Using the integrated UART and SPI interfaces to manage data flow between older peripheral hardware and modern sensors.
Simple Industrial Automation
Implementing basic logic control and monitoring in systems requiring brown-out detection and hardware watchdog timers for reliability.
Digital Signal Toggling
Leveraging the 36 I/O pins for complex switching matrices or user interface management in embedded appliances.

Key Specifications

Speed 20MHz
RAM Size 256 x 8
Core Size 8-Bit
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity EBI/EMI, I2C, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 36
Core Processor 8051
Package / Case 44-LCC (J-Lead)
Oscillator Type Internal
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 44-PLCC (16.6x16.6)
Voltage - Supply (Vcc/Vdd) 2.4V ~ 5.5V

Getting Started

Developers can program the AT89LP52 using the built-in serial interface for In-System Programming (ISP). Software development is typically performed in C or Assembly using toolchains like Keil C51 or SDCC. Ensure the hardware configuration correctly sets the clock mode to take advantage of the 20MHz speed or maintain compatibility with legacy timing.

AT89LP52-20 Family

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

Part Number Package Stock
AT89LP52-20JU (this part) LCC-44 246
AT89LP52-20AU TQFP-44 —

Also Consider

AT89S52-24JU MCHPMicrochip Technology - A more traditional 8051 variant with a higher 24MHz clock speed but slower instruction execution cycles compared to the LP series.