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.
