COP8SAB728N8

Overview

The COP8SAB728N8 is an 8-bit CMOS microcontroller from the COP8SA family, manufactured by National Semiconductor. It features 2k bytes of ROM memory and 128 bytes of RAM. The device operates with a maximum clock frequency of 4 MHz and supports a supply voltage range of 2.5V to 5.5V. It is housed in a 28-pin DIP package and includes 23 I/O lines. The component integrates a 12-bit A/D converter with six input channels, analog comparators, and multiple timer/counters for precise control applications.

Feature Summary

• Integrates an 8-bit processing core with high-resolution 12-bit analog-to-digital conversion capabilities for accurate sensor interfacing.
• Features advanced power management through HALT and IDLE modes to minimize energy consumption in battery-operated systems.
• Includes versatile timer subsystems supporting PWM generation, event counting, and capture modes for complex timing tasks.
• Provides robust communication via MICROWIRE/PLUS serial interface compatible with standard SPI protocols.

Applications

• Battery-powered consumer electronics requiring low standby current
• Home appliance control units
• Industrial instrumentation and measurement devices

Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to ensure correct memory type and package configuration. Confirm RoHS compliance status as older revisions may not meet current environmental standards. Check for availability of development tools like iceMASTER for programming and debugging purposes prior to procurement.

Selection Notes

Select this component when a cost-effective 8-bit solution with integrated ADC is required. Ensure the application fits within the 2k ROM limit and 128-byte RAM constraint. Verify that the 28-pin DIP package aligns with the PCB layout requirements. Consider the 4 MHz speed sufficient for the intended control loops before finalizing the design.

Part Context

This part belongs to the COP8SA series, which offers form-fit-function compatibility with the earlier COP800 series. It utilizes MROM technology for permanent code storage. The family emphasizes low EMI emissions and high noise immunity, making it suitable for noisy industrial environments. Development support is available through dedicated hardware and software tools.

Replacement Considerations

The COP8SAC728N8 serves as a direct upgrade within the same family, offering increased 4k ROM memory while maintaining pinout compatibility. For OTP versions, the COP8SAA728N8 provides equivalent functionality with programmable memory options. Ensure software migration strategies are in place when switching between ROM and OTP variants.