ADM690AANZ

Supervisors Overview

The ADM690AANZ is a voltage supervisory circuit manufactured by Analog Devices Inc., designed for monitoring power supply integrity in microprocessor systems. It operates within a supply voltage range up to 5.5 V and features a precise threshold voltage of 4.65 V. The device incorporates a watchdog timer, battery backup switch, and power failure detection capabilities. It provides a reset delay time of 200 ms and draws a typical operating supply current of 100 uA. The component supports an overvoltage threshold of 4.75 V and has a maximum power dissipation of 400 mW. It is housed in a PDIP-8 package with through-hole mounting and functions across an industrial temperature range from -40 C to +85 C.

Supervisors Feature Summary

• Integrates voltage supervision, watchdog timing, and battery backup switching functions into a single CMOS process IC.
• Provides open collector output for reset signaling without requiring manual reset inputs or chip enable signals.
• Detects power failures and monitors supply voltage against fixed thresholds to ensure system stability.

Supervisors Applications

• Microprocessor reset circuits
• Battery backup switching applications
• CMOS RAM write protection systems

Supervisors Procurement Notes

Verify availability status carefully as Mouser indicates the part is currently not supplied in your region, suggesting limited sales or factory special orders. Confirm RoHS compliance details directly with the manufacturer documentation before procurement. Ensure the PDIP-8 through-hole package matches your PCB layout requirements. Check for obsolescence notices or lifecycle restrictions on the official Analog Devices website prior to finalizing design-in decisions.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold and 200 ms reset delay are required for 5 V logic systems. The open collector output necessitates external pull-up resistors, which must be accounted for in the design. Consider the 100 uA supply current for low-power applications. Compare against surface-mount alternatives like the ADM690AARMZ if space constraints exist. Verify that the through-hole PDIP-8 package is compatible with your assembly process.

Supervisors Part Context

The ADM690AANZ belongs to the ADM690A series of supervisory circuits from Analog Devices. It serves as a dedicated power management solution for ensuring reliable operation of digital systems. The device complements other parts in the family, such as the MAX690AESA+, offering similar functionality in different packages. It is distinct from clock oscillators like the ADM8690ANZ and DC-DC converters like the LT3690HUFE#PBF, focusing solely on voltage monitoring and reset generation.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include MAX817LCUA+ from Analog Devices/Maxim Integrated. Verify pinout compatibility and electrical parameter alignment, particularly the reset threshold and output type, before substitution.