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AT89LS52-16AU

8051 8-bit MCU, 8KB Flash ISP, 256B RAM, 16MHz, 2.7-4V, 44-TQFP, -40~85°C

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Manufacturer Part：

AT89LS52-16AU

Package：

44-TQFP (10x10mm)

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Description

Product Overview

The AT89LS52-16AU is a low-voltage 8-bit 8051-based microcontroller from Microchip (formerly Atmel) with 8KB of in-system programmable Flash memory. It operates from 2.7V to 4.0V at up to 16MHz, providing a cost-effective solution for embedded control applications in a 44-pin TQFP package.

Key Specifications

Core 8051 (MCS-51 compatible)
Core Size 8-bit
Max Frequency 16MHz
Program Memory 8KB Flash (ISP)
RAM 256 bytes
I/O Pins 32
Timers 3 x 16-bit
UART 1 (full duplex)
Interrupt Sources 8
Watchdog Timer Yes
Supply Voltage 2.7V to 4.0V
Package 44-TQFP (10x10mm)
Operating Temperature -40°C to +85°C

Features

  • Low-voltage operation (2.7V-4.0V) — 3.3V compatible
  • ISP Flash — in-system programming via SPI
  • Dual data pointer for faster memory access
  • Power-off flag for power-fail detection
  • Idle and power-down modes
  • Interrupt recovery from power-down
  • Three-level program memory lock

Applications

  • Industrial control and automation
  • Consumer electronics
  • Embedded instrumentation
  • Motor control systems
  • Legacy 8051 system migration

The AT89LS52-16AU is a low-voltage 8-bit microcontroller based on the industry-standard 8051 architecture, featuring 8KB of in-system programmable Flash memory. Operating from 2.7V to 4.0V at up to 16MHz, it provides 3.3V-compatible operation ideal for mixed-voltage systems. The device includes 256 bytes of RAM, 32 I/O lines, three 16-bit timers, a full-duplex UART, watchdog timer, and dual data pointers. ISP capability allows firmware updates without removing the device from the circuit.

The AT89LS52 executes the standard MCS-51 instruction set with most instructions completing in 1-2 machine cycles (12 oscillator periods per machine cycle at 16MHz). The CPU fetches instructions from the 8KB on-chip Flash, accesses data in the 256-byte internal RAM, and communicates through the 32 general-purpose I/O lines organized as Port 0-3. The three 16-bit timers can operate in modes 0-3 including capture, auto-reload, and baud rate generation. The UART supports full-duplex serial communication with programmable baud rates. ISP programming is performed through the SPI interface (P1.5=MOSI, P1.6=MISO, P1.7=SCK).

Port Pins Functions
P0 8 pins General I/O, Address/Data bus (AD0-AD7)
P1 8 pins General I/O, T2/T2EX, ISP (MOSI/MISO/SCK)
P2 8 pins General I/O, Address bus high (A8-A15)
P3 8 pins General I/O, UART/INT/Timers/WR/RD
  • Industrial PLC and motor drive control
  • Consumer appliance microcontroller
  • Embedded instrumentation and measurement
  • Legacy 80C51/80C52 system upgrade to 3.3V
  • Access control and security systems
Manufacturer Part Number Flash Notes
Microchip AT89S52-16AU 8KB 5V version (4.5-5.5V)
Silicon Labs C8051F320 16KB 8051 with USB, higher integration
Nuvoton N78E052A-16A 8KB 8051 equivalent, 5V
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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  • Air Freight: 7 – 12 working days
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    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

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    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

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    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
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2. Classified Professional Packaging

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  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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