MAX639EPA+

Voltage Regulators - DC DC Switching Regulators Overview

The MAX639EPA+ is a microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.2V to 5.5V and consumes only 4µA of supply current at 1.8V. The device features a factory-set reset threshold voltage of 4.40V with an accuracy of ±1%. It provides a push-pull active-low reset output and includes a manual reset input. The reset timeout delay is fixed at 200ms. The component is housed in an 8-pin PDIP-Narrow package and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Monitors power-supply voltages from 1.2V to 5.5V while maintaining low quiescent current consumption.
• Provides a push-pull active-low reset output that asserts when the monitored voltage falls below the threshold.
• Includes a manual reset input for forcing the reset output into the asserted state.

Voltage Regulators - DC DC Switching Regulators Applications

• Microprocessor system power supervision
• Battery-powered equipment monitoring
• Portable instrumentation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'EPA+' indicates lead-free packaging and RoHS compliance as per the manufacturer's datasheet. Confirm the PDIP-Narrow-8 package dimensions match your PCB footprint requirements. Check for obsolescence notices or lifecycle status updates directly from Analog Devices, as availability may vary. Ensure the 4.40V threshold aligns with your system's voltage tolerance needs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 4.40V threshold is required for systems operating between 1.2V and 5.5V. The push-pull output allows direct driving of logic inputs without external pull-ups. Consider the 4µA supply current for battery life optimization. Verify that the 200ms timeout meets the startup timing requirements of the controlled processor or logic circuit.

Voltage Regulators - DC DC Switching Regulators Part Context

The MAX639EPA+ belongs to the MAX639 series of single-supply microprocessor supervisory circuits. This family offers various threshold voltages and timeout delays to accommodate different system architectures. The EPA+ designation specifies the through-hole PDIP-Narrow-8 package variant, distinguishing it from surface-mount options like SC70 or µDFN packages available in the same series.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the reset output type of the MAX639EPA+?

The MAX639EPA+ features a push-pull active-low reset output.

Does the MAX639EPA+ have a watchdog timer?

No, the MAX639EPA+ does not include a watchdog timer; it functions solely as a voltage supervisor with a manual reset input.