COP8SAA728N8

Overview

The COP8SAA728N8 is an 8-bit CMOS microcontroller from the COP8SA family, manufactured by National Semiconductor. It features 1k byte of OTP EPROM memory and 64 bytes of RAM. The device operates with a maximum clock frequency of 10 MHz and supports multiple package options including 28-pin DIP and SOIC. It offers versatile I/O configurations with 12, 16, or 24 pins depending on the specific variant selected.

Feature Summary

• High-speed instruction execution with single-cycle instructions for efficient code processing
• Integrated 16-bit timer/counter supporting PWM, external event counting, and input capture modes
• Low electromagnetic interference design suitable for noise-sensitive applications
• Flexible clocking options including internal R/C oscillator and external crystal

Applications

• Battery-powered consumer electronics requiring low power consumption
• Industrial control systems needing robust EMI performance
• Home appliance controllers with simple interface requirements
• Cost-sensitive embedded applications utilizing OTP programming

Procurement Notes

Verify the specific suffix codes to confirm memory type, package style, and temperature range. Ensure compatibility with existing development tools such as iceMASTER for programming and debugging. Check RoHS compliance status as older batches may not meet current environmental standards. Confirm pinout alignment if replacing legacy components in existing designs.

Selection Notes

Choose this component when a balance of moderate memory capacity and high integration is required. The OTP version allows for design flexibility during prototyping and small production runs. Consider the available I/O count and package size relative to board space constraints. Evaluate the need for analog peripherals as this specific model lacks built-in ADC compared to other COP8 variants.

Part Context

This part belongs to the COP8SA series, which serves as a modern replacement for the older COP800 family. It maintains binary compatibility with previous generations while offering improved performance and lower EMI. The series is designed for cost-effective mass production using ROM or OTP technologies. It represents a mature technology platform widely used in established industrial and consumer markets.

Replacement Considerations

Direct form-fit-function replacements include other COP8SAA7 variants with different package styles. Verify that the target application does not require additional analog features found in COP8SG or COP8ACC families. Cross-reference pinouts carefully when substituting between DIP and SOIC packages.