COP8SAC728M9

Overview

The COP8SAC728M9 is an 8-bit CMOS microcontroller from the COP8SA family, featuring 4k bytes of OTP EPROM and 128 bytes of RAM. It utilizes a modified Harvard architecture with a 1 µs instruction cycle time at 10 MHz CKI. The device supports single-supply operation between 2.7V and 5.5V and includes a multi-function 16-bit timer/counter with PWM output, MICROWIRE/PLUS serial I/O, and Multi-Input Wakeup logic. It is housed in a 28-pin SOIC package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Low electromagnetic interference design utilizing patented EMI reduction technology for quiet operation.
• Versatile instruction set optimized for code efficiency with single-byte, single-cycle execution capabilities.
• Flexible I/O configuration allowing software-selectable TRI-STATE, push-pull, or weak pull-up modes.
• Integrated power management features including HALT and IDLE modes with low current drain.

Applications

• Battery-powered consumer electronics requiring low power consumption
• Industrial control systems needing robust EMI performance
• Cost-sensitive embedded applications utilizing OTP programming

Procurement Notes

Verify the specific ordering suffix M9 corresponds to the 0°C to +70°C commercial temperature grade and 28-pin SOIC package. Confirm that the OTP EPROM variant meets the required security and read/write protection specifications for the target application. Ensure compatibility with existing development tools for COP8SA family devices.

Selection Notes

Select this component when a cost-effective 8-bit solution with OTP flexibility and low EMI is required. Consider the 28-pin package constraints against available I/O needs. Evaluate the internal R/C oscillator accuracy if precise timing is critical without external crystals. Compare against ROM-based variants if reprogramming is not necessary.

Part Context

This part belongs to the COP8SA family, which serves as a pin-compatible superset to the older COP800 family. It replaces legacy designs while offering enhanced features like reduced EMI and smaller packaging options. The family integrates advanced peripherals such as the MICROWIRE/PLUS interface and high-current outputs suitable for direct drive applications.

Replacement Considerations

COP8SAC728N9 (Windowed EPROM version)

FAQ

What is the maximum clock frequency supported by the COP8SAC728M9?

The device supports a maximum clock frequency of 10 MHz, resulting in a 1 µs instruction cycle time under specified voltage conditions.

Does the COP8SAC728M9 support hardware stack operations?

No, the COP8SA family uses a software stack scheme located in RAM, allowing for flexible subroutine calls limited only by available memory rather than a fixed hardware stack depth.

How does the device handle electromagnetic interference?

It incorporates patented EMI reduction technology, including low EMI clock circuitry, gradual turn-on output drivers, and internal ICC smoothing filters to reduce radiated emissions.