MAX702CPA

Supervisors Overview

The MAX702CPA is a supervisory circuit designed to monitor power supplies in microprocessor and digital systems. It operates within a supply voltage range of +3V to +15V, with a maximum rating of 15V. The device features a fixed threshold voltage of 4.65V and an overvoltage threshold of 4.75V. It provides a reset delay time of 350ms and maintains accuracy within 2.5%. The quiescent current is 200µA. The output is active low push-pull. It supports manual reset input but lacks watchdog timer or battery backup switch functions. The component is housed in an 8-pin PDIP package and operates between 0°C and +70°C.

Supervisors Feature Summary

• Provides reliable system reset signals for microprocessors and digital circuits during power-up, power-down, or brown-out conditions.
• Integrates a debounced manual reset input to allow user-initiated system resets without external components.
• Maintains correct logic state on the reset output even when supply voltage drops as low as +1V.
• Eliminates the need for external adjustment or components when used with standard +5V powered circuits.

Supervisors Applications

• Microprocessor (µP) power supply monitoring
• Digital system supervision
• Computer control systems
• Smart instrumentation

Supervisors Procurement Notes

Verify the specific suffix 'CPA+' against the manufacturer's official datasheet to confirm the package type and temperature range. Ensure compatibility with existing PCB footprints for the PDIP-8 configuration. Check for RoHS compliance status if required by project specifications. Confirm availability through authorized distributors as supply may be limited.

Supervisors Selection Notes

Select this part when a simple, low-cost voltage monitor is needed for single-supply applications. It is suitable for systems requiring a fixed 4.65V threshold. Consider alternative models like MAX700 or MAX701 if adjustable thresholds or complementary outputs are required. Verify that the 350ms reset delay meets the timing requirements of the target microprocessor.

Supervisors Part Context

The MAX702 belongs to the MAX700/MAX701/MAX702 family of power-supply monitors from Analog Devices/Maxim Integrated. This series is engineered for high reliability and low cost in embedded environments. The MAX702 represents the simplest variant in the lineup, focusing on basic voltage monitoring and reset generation without additional features like watchdog timers or battery backup switches found in other family members.

Supervisors FAQ

What is the minimum supply voltage at which the MAX702CPA guarantees a correct reset output state?

The RESET output is guaranteed to be in the correct state for VCC voltages down to +1V.

Does the MAX702CPA include a watchdog timer function?

No, the MAX702CPA does not include a watchdog timer; it only provides power-supply monitoring and reset generation.

What is the typical reset delay time for the MAX702CPA?

The reset delay time is typically 350ms.