Technical Summary: 87C752 Microcontroller

Overview

The Philips 83C752/87C752 is a high-performance, cost-effective microcontroller that leverages the advantages of the 80C51 architecture while offering enhanced features in a compact package. Fabricated using Philips' high-density CMOS technology, this microcontroller is designed for applications requiring efficient processing power, low power consumption, and reliable performance. The epitaxial substrate used in its construction minimizes latch-up susceptibility, ensuring robust operation in demanding environments.

The 87C752 is available in two variants: an erasable quartz lid version for development and prototyping, and a One-Time Programmable (OTP) plastic version for production use. This flexibility makes it suitable for both experimental and commercial applications.

Features

The 87C752 microcontroller boasts a comprehensive set of features that make it a versatile choice for embedded systems:

• 80C51-Compatible Architecture: Ensures compatibility with existing software and development tools, reducing migration effort.
• High-Density CMOS Technology: Provides low power consumption and high noise immunity.
• Erasable Quartz Lid (87C752) and OTP Plastic Package (83C752): Offers flexibility for development and production.
• Epitaxial Substrate: Minimizes latch-up issues, enhancing reliability.
• On-Chip Program Memory: Includes ROM (for OTP version) or EPROM (for erasable version) for firmware storage.
• On-Chip Data Memory: Features RAM for temporary data storage during operation.
• Multiple I/O Ports: Provides versatile interfacing options for peripherals.
• Timers/Counters: Includes built-in timers for precise timing operations.
• Serial Communication Interface: Supports UART for serial data communication.
• Low Power Consumption: Ideal for battery-powered applications.

Applications

The 87C752 microcontroller is well-suited for a wide range of applications, including but not limited to:

• Consumer Electronics: Remote controls, small appliances, and audio equipment.
• Industrial Control Systems: Sensor interfacing, motor control, and automation.
• Automotive Electronics: Dashboard controls, lighting systems, and simple engine management.
• Embedded Systems: Custom control units, data loggers, and monitoring devices.
• Medical Devices: Portable diagnostic equipment and patient monitoring systems.
• Security Systems: Access control panels and alarm systems.

Electrical Characteristics

The 87C752 microcontroller operates under the following electrical specifications:

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.5V to +7.0V
• Input Voltage (V_IN): -0.5V to V_CC + 0.5V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 4.5V to 5.5V
• Operating Temperature: 0°C to +70°C (commercial), -40°C to +85°C (industrial)
• Clock Frequency: Up to 12 MHz

Power Consumption

• Active Mode: Typically 10 mA at 5V, 12 MHz
• Idle Mode: Typically 5 mA at 5V, 12 MHz
• Power-Down Mode: Typically 50 µA at 5V

Package Information

The 87C752 microcontroller is available in multiple package options to suit different application requirements:

Plastic Dual In-Line Package (PDIP)

• Package Code: DIP-40
• Dimensions: 52.32 mm x 13.97 mm (including leads)
• Pin Count: 40
• Lead Pitch: 2.54 mm

Plastic Leaded Chip Carrier (PLCC)

• Package Code: PLCC-44
• Dimensions: 16.51 mm x 16.51 mm
• Pin Count: 44
• Lead Pitch: 1.27 mm

Ceramic Dual In-Line Package (CERDIP)

• Package Code: CERDIP-40
• Dimensions: 52.32 mm x 13.97 mm (including leads)
• Pin Count: 40
• Lead Pitch: 2.54 mm

Conclusion

The Philips 87C752 microcontroller is a powerful and flexible solution for embedded systems, combining the reliability of the 80C51 architecture with modern CMOS technology. Its low power consumption, robust design, and versatile packaging options make it an excellent choice for a wide range of applications. Whether used in consumer electronics, industrial control, or automotive systems, the 87C752 delivers consistent performance and ease of integration.