Manufacturer Part Number

AT89C51AC3-SLSIM

Description

8-bit microcontroller with 64KB flash memory in a 44-pin PLCC package. Runs up to 60MHz. Based on the 80C51 architecture. Has in-system programmable flash memory. Offers EEPROM, RAM, UART/USART connectivity, and integrated peripherals. Used for embedded control and data processing.

Specifications

Core: 80C51

Processing Speed: Up to 60MHz

Program Memory: 64KB Flash (64K x 8)

EEPROM: 2KB

RAM: 2.25KB

I/O Pins: 36

Data Converters: 8-channel, 10-bit ADC

Operating Voltage: 3V to 5.5V

Package: 44-PLCC (16.6 x 16.6mm), J-Lead LCC

Mounting: Surface Mount

Operating Temperature: -40°C to +85°C

Peripherals: PWM, Watchdog Timer, Power-on Reset

Connectivity: UART/USART

Oscillator: Requires external oscillator

RoHS: Not compliant

MSL: Level 2 (1 year)

REACH: Unaffected

ECCN: 3A991A2

HTSUS: 8542.31.0001

Device Structure

Monolithic integrated circuit. Uses 80C51 CPU core with on-chip programmable Flash, EEPROM, RAM, and analog-to-digital converter. Peripheral components and I/O are mapped internally. Packaged in 44-pin PLCC for surface-mount applications.

Performance Characteristics

Fast operating speed up to 60MHz.

High-capacity on-chip Flash enables in-system and in-application programming.

Integrated analog-to-digital conversion with 8 channels.

Stable operation across -40°C to 85°C.

Multiple I/O and digital communication support.

Application Environments

Designed for industrial controls, instrumentation, consumer electronics, and embedded systems. Suitable for harsh environments due to wide temperature range. Ideal where moderate processing power, integrated memory, and peripheral connectivity are required.

Selection Guidelines

Choose for legacy 80C51 application updates requiring more memory.

Check that operating voltage and temperature meet your project needs.

Ensure sufficient I/O and integrated peripherals for application.

Verify system compatibility with PLCC surface-mount footprint.

Usage Considerations

Product is obsolete; avoid for new designs unless for legacy replacement.

RoHS non-compliance must be considered for projects needing environmental approval.

Requires external oscillator circuit for stable operation.

Observe Moisture Sensitivity Level (MSL 2) precautions during storage and assembly.

Ensure correct surface-mount process for PLCC/J-lead package.

Potential Equivalent/Replacement Models

Direct substitute listed as AT89C51AC3-SLSUM.

For other alternatives, review comparable 8051-architecture MCUs with similar memory, I/O, and speed from Microchip or other vendors.

If fully equivalent models are needed, contact the Ariat-Tech sales team for detailed assistance and up-to-date sourcing support.

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