COP8SAC728M8

Overview

The COP8SAC728M8 is an 8-bit CMOS microcontroller belonging to the National Semiconductor COP8SA family. It features 4k bytes of ROM memory and 128 bytes of RAM, providing sufficient storage for embedded control applications. The device supports multiple I/O configurations with up to 40 pins available in specific packages. It operates within a standard industrial temperature range and utilizes a high-speed architecture capable of executing instructions efficiently at clock frequencies up to 10 MHz.

Feature Summary

• Implements a modified Harvard architecture that allows simultaneous instruction fetching and data transfer via a two-stage pipeline for improved execution efficiency.
• Integrates a versatile 16-bit timer/counter module supporting processor-independent PWM generation, external event counting, and input capture modes.
• Includes a MICROWIRE/PLUS serial I/O interface compatible with SPI protocols for efficient communication with peripheral devices.

Applications

• Low-cost embedded control systems requiring compact code size
• Battery-powered devices utilizing low-power HALT and IDLE modes
• Industrial controllers needing robust I/O handling and timer functions

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm memory type (ROM vs OTP) and package variant. Ensure compatibility with existing development tools such as COP8 software and hardware kits. Confirm temperature grade requirements match the application environment before finalizing procurement specifications.

Selection Notes

Select this component when designing cost-sensitive applications requiring moderate program memory capacity. The COP8SA series serves as a direct replacement for older COP800 series devices with enhanced pin utilization. Consider the available package options, including DIP, SOIC, and CSP, based on board space constraints and thermal management needs.

Part Context

This microcontroller is part of the COP8SA family, which bridges legacy COP800 compatibility with modern integration levels. The series emphasizes high pin efficiency, offering extensive I/O capabilities relative to package size. It targets applications where code density and power consumption are critical design parameters alongside processing speed.

Replacement Considerations

The COP8SA series is documented as a functional substitute for the COP800 series in new designs. Verify pinout compatibility and instruction set alignment when migrating from older generations to ensure seamless integration without hardware redesign.