83C754

83C754/87C754 Microcontroller Technical Summary

Overview

The Philips 83C754/87C754 is an 8-bit microcontroller that combines the robust architecture of the 80C51 family with cost-effective packaging and low-power operation. Fabricated using Philips' high-density CMOS technology, this microcontroller leverages an epitaxial substrate to minimize latch-up susceptibility and enhance reliability. The 83C754 is available in both erasable (quartz lid) and One-Time Programmable (OTP) plastic packages, making it suitable for prototyping and production environments.

Key Features

• 80C51-Compatible Architecture: Inherits the proven instruction set and core functionality of the 80C51 family.
• High-Density CMOS Technology: Provides low power consumption and high noise immunity.
• Epitaxial Substrate: Enhances latch-up resistance and overall device reliability.
• Memory Options: Includes on-chip ROM (83C754) or EPROM (87C754) variants.
• Small Package Options: Available in space-saving packages ideal for compact designs.
• Low-Cost Solution: Optimized for cost-sensitive applications without sacrificing performance.

Applications

The 83C754/87C754 is well-suited for a wide range of embedded control applications, including:

• Consumer electronics (remote controls, small appliances)
• Industrial control systems
• Automotive subsystems
• Sensor interfaces
• Low-power portable devices
• Hobbyist and educational projects

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): -0.5V to +6.0V
• Input Voltage (any pin): -0.5V to Vcc+0.5V
• Operating Temperature: -40°C to +85°C
• Storage Temperature: -65°C to +150°C

DC Characteristics (Vcc = 5V ±10%, TA = -40°C to +85°C)

• Power Supply Current (Active Mode @ 12MHz): 15mA max
• Power Supply Current (Idle Mode @ 12MHz): 5mA max
• Input Low Voltage (VIL): -0.5V to 0.2Vcc
• Input High Voltage (VIH): 0.7Vcc to Vcc+0.5V
• Output Low Voltage (IOL = 1.6mA): 0.45V max
• Output High Voltage (IOH = -60μA): 2.4V min

AC Characteristics

• Clock Frequency: 0 to 12MHz
• Machine Cycle: 1μs @ 12MHz
• External Data Memory Access Time: 500ns max
• Port Rise/Fall Time: 10ns max

Package Information

The 83C754/87C754 is available in multiple package options:

DIP (Dual In-line Package)

• 40-pin configuration
• Lead pitch: 2.54mm
• Package dimensions: 52.32 x 13.97mm
• Operating temperature: -40°C to +85°C

PLCC (Plastic Leaded Chip Carrier)

• 44-pin configuration
• Lead pitch: 1.27mm
• Package dimensions: 16.66 x 16.66mm
• Surface-mount compatible

PQFP (Plastic Quad Flat Pack)

• 44-pin configuration
• Lead pitch: 0.8mm
• Package dimensions: 10 x 10mm
• Ultra-thin profile for space-constrained applications

Memory Organization

The 83C754/87C754 features a modified Harvard architecture with the following memory configuration:

• ROM/EPROM: 4KB on-chip program memory
• RAM: 128 bytes internal data memory
• External Memory: Supports up to 64KB of external program/data memory
• Special Function Registers: 21 dedicated registers for peripheral control

Peripheral Features

• Four 8-bit I/O ports (32 I/O lines total)
• Two 16-bit timer/counters
• Full-duplex UART for serial communication
• Boolean processor for bit manipulation
• Interrupt system with 5 sources and 2 priority levels

Development Support

The 83C754/87C754 is supported by a comprehensive development ecosystem:

• In-circuit emulators for real-time debugging
• Cross-assemblers and C compilers
• Evaluation boards for rapid prototyping
• EPROM programmers for 87C754 variant
• Detailed technical documentation and application notes

Ordering Information

The device is available in several variants:

• 83C754: Factory-masked ROM version
• 87C754: UV-erasable EPROM version (ceramic windowed package)
• 87C754-OTP: One-Time Programmable plastic package

Conclusion

The Philips 83C754/87C754 microcontroller provides an excellent balance of performance, power efficiency, and cost-effectiveness for embedded control applications. Its compatibility with the 80C51 architecture ensures easy migration for existing designs, while its compact package options make it ideal for space-constrained applications. With robust electrical characteristics and comprehensive development support, this microcontroller is well-suited for both prototyping and production environments across multiple industries.