ADM708TARZ

Supervisors Overview

The ADM708TARZ is a microprocessor supervisory circuit designed for monitoring 5 V power supplies and batteries. It features an active high reset output with a precision threshold of 4.40 V and a typical reset pulse width of 200 ms. The device operates within a supply voltage range of 1 V to 5.5 V, maintaining guaranteed reset validity down to 1 V. It includes a debounced manual reset input and draws 190 μA of quiescent current. The component is housed in an 8-pin SOIC package and supports an industrial operating temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Provides active high reset output for reliable system initialization
• Includes debounced manual reset input compatible with TTL/CMOS logic
• Ensures valid reset signal even at low supply voltages down to 1 V
• Offers precise power supply voltage monitoring without watchdog timer functionality

Supervisors Applications

• Microprocessor systems requiring critical supply monitoring
• Computer hardware and controller boards
• Intelligent instruments and portable devices
• Battery-powered equipment needing low battery detection

Supervisors Procurement Notes

Verify the specific suffix TARZ indicates the 8-SOIC surface-mount package variant. Confirm the 4.40 V threshold requirement matches the design specifications. Check for obsolescence status as older ADM708 variants may be discontinued. Ensure compatibility with existing PCB footprints for 8-lead SOIC components during procurement planning.

Supervisors Selection Notes

Select this component when an active high reset signal is required rather than active low. It is suitable for applications needing precise 4.40 V monitoring without the complexity of a watchdog timer. Consider the 190 μA quiescent current for power-sensitive designs. Verify that the 200 ms reset pulse width meets the target microprocessor's timing requirements.

Supervisors Part Context

The ADM708 belongs to the ADM705–ADM708 family of low-cost supervisory circuits from Analog Devices. Unlike the ADM706 which includes a watchdog timer, the ADM708 focuses on simple reset generation. It serves as a superior upgrade for legacy MAX708 parts, offering comparable functionality with improved precision and lower power consumption for standard 5 V system monitoring.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include MAX708TCSA+.