COP8SAB728N9

Overview

The COP8SAB728N9 is an 8-bit CMOS microcontroller from the COP8SA family, manufactured by National Semiconductor. It features a 2k ROM memory size and 128 bytes of RAM. The device utilizes the COP800 CPU core architecture and operates within a standard voltage range. It is housed in a 28-pin Small Outline Integrated Circuit (SOIC) package with a plastic/epoxy body material. The component supports commercial temperature ranges and includes essential peripheral interfaces for embedded control applications.

Feature Summary

• High-speed instruction execution with improved Harvard architecture allowing overlapping instruction fetch and data transfer via two-level pipeline.
• Integrated multi-function timer system supporting PWM generation, external event counting, and input capture modes.
• Low electromagnetic interference design suitable for cost-sensitive applications requiring signal integrity.
• Flexible clock options including crystal, resonator, external oscillator, or internal R/C oscillator configurations.

Applications

• Battery management systems
• Home appliance controllers
• Instrumentation devices

Procurement Notes

Verify the specific suffix N9 against official National Semiconductor documentation to confirm pinout compatibility and package variant. Ensure the ordering code matches the required memory type and operating temperature range. Cross-reference with Texas Instruments resources as they are the current manufacturer. Confirm RoHS compliance status if required for your assembly process.

Selection Notes

Select this model when a 2k ROM capacity and 128-byte RAM are sufficient for the application logic. Consider the COP8SA series for its form-fit-function compatibility with older COP800 designs. Evaluate the 28-pin SOIC package constraints against board space requirements. Verify that the integrated peripherals meet the timing and interface needs without external components.

Part Context

This component belongs to the COP8SA series of 8-bit microcontrollers designed as low-cost alternatives to legacy devices. The series emphasizes high integration with features like on-chip oscillators and comparators. It serves as a drop-in replacement for certain COP800 variants while offering enhanced performance through optimized architecture and lower power consumption modes.

Replacement Considerations

The COP8SGx5 ROM versions are functionally compatible OTP alternatives for production use. Check datasheets for exact pinout correspondence between COP8SA and COP8SG families. Ensure software migration paths are validated due to potential minor architectural differences in interrupt handling or timer configurations.