MAX1232MJA

Supervisors Overview

The MAX1232MJA is a microprocessor supervisory circuit designed for system housekeeping and power-supply monitoring. It operates within a maximum supply voltage of 5.5V and consumes only 200µA of operating current. The device features adjustable overvoltage thresholds at 4.49V or 4.74V and includes a watchdog timer with reset delay times of 150ms, 600ms, or 1.2s. It provides manual reset functionality and supports active high, active low, and open drain outputs. The component is housed in an 8-pin CDIP package and functions across a temperature range of -55°C to +125°C.

Supervisors Feature Summary

• Provides precision voltage supervision with adjustable threshold options
• Integrates a configurable watchdog timer for software execution monitoring
• Includes a debounced manual reset input for external override capability

Supervisors Applications

• Critical microprocessor power monitoring systems
• Industrial controllers requiring extended temperature operation
• Intelligent instruments demanding high reliability
• Computer systems needing plug-in upgrade compatibility

Supervisors Procurement Notes

Verify the specific suffix designation carefully, as military-grade variants like the MJA/883B differ significantly from commercial versions regarding qualification standards and availability. Confirm that the required package type matches the application board layout, as this part number specifically denotes the ceramic dual in-line package configuration. Ensure the selected threshold voltage aligns with the target power rail specifications before finalizing procurement orders.

Supervisors Selection Notes

Select this component when extending the operational temperature range beyond standard commercial limits is necessary. The MAX1232MJA serves as a direct functional replacement for the DS1232 while offering reduced power consumption. Consider the available watchdog timing options to match the specific software execution requirements of the target microprocessor architecture.

Supervisors Part Context

This device belongs to the MAX1232 series of microprocessor monitors manufactured by Analog Devices under the Maxim Integrated brand. It represents an enhanced version of the legacy Dallas DS1232, optimized for lower power usage without sacrificing supervisory accuracy. The series is widely recognized for providing essential reset generation and power-fail detection in embedded computing environments.

Supervisors Replacement Considerations

The MAX1232MJA is documented as a plug-in upgrade for the DS1232. Verify pinout compatibility and threshold voltage settings when substituting other members of the MAX1232 family.