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AT89LP52-20AU

MCHPAT89LP52-20AU

Microchip Technology
8051 89LP Microcontroller IC 8-Bit 20MHz 8KB (8K x 8) FLASH 44-TQFP (10x10)
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Overview

The AT89LP52-20AU is a low-power, high-performance 8-bit microcontroller based on the enhanced 8051 architecture, featuring 8KB of In-System Programmable (ISP) Flash memory. It operates at up to 20MHz and provides 36 I/O pins in a 44-TQFP package, making it suitable for legacy migrations requiring improved execution speed. The device includes essential peripherals such as a watchdog timer, brown-out detection, and a 2-cycle hardware multiplier for efficient math operations.

Why Choose This Part

It offers significantly better performance than standard 8051 cores by utilizing a single-cycle instruction fetch and a 2-cycle hardware multiplier. The wide 36 I/O count in a compact TQFP package provides high connectivity density for small-form-factor designs. Integrated safety features like brown-out detection and a power-on reset with a power-off flag ensure reliable operation in electrically noisy environments.

Applications

Industrial Control Systems
Used in PLC-like logic controllers and industrial monitoring where 8051 code compatibility and robust 5V operation are required.
Legacy Equipment Upgrades
Ideal for replacing older, slower 8051 variants to improve performance without requiring a complete redesign of existing software architectures.
Sensor Interface Nodes
Leverages 36 I/O lines and multiple serial interfaces (I2C, SPI, UART) to aggregate data from various digital and analog sensors.
Appliances and White Goods
Handles user interface controls, motor timing, and basic logic for household electronics using its built-in PWM and watchdog timers.

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-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) 2.4V ~ 5.5V

Getting Started

Development is typically performed using the Keil C51 toolchain or the SDCC open-source compiler. Programming can be handled via the In-System Programming (ISP) interface using a standard serial or SPI-based programmer. Microchip's AT89LP series evaluation kits provide a hardware platform for rapid prototyping and debugging of the enhanced 8051 features.

Also Consider

AT89S52-24AU MCHPMicrochip Technology - A traditional 8051 variant with a higher 24MHz clock support but using the standard 12-cycle instruction architecture.

Categories

Microcontrollers > 8051
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