ADM708TAR

Supervisors Overview

The ADM708TAR is a microprocessor supervisory circuit from Analog Devices, designed for monitoring 5 V power supplies and batteries. It features a precision supply voltage monitor with a typical threshold of 4.40 V and an active high reset output. The device includes a debounced manual reset input and operates within a supply voltage range of 1 V to 5.5 V. It provides a fixed 200 ms reset pulse width and draws a quiescent current of 190 μA. The component supports industrial temperature ranges from -40°C to +85°C and is housed in an 8-SOIC package.

Supervisors Feature Summary

• Provides precise monitoring of supply voltages with guaranteed valid reset signals down to 1 V
• Features an active high push-pull reset output suitable for direct interface with digital logic
• Includes a debounced manual reset input to prevent false triggering from switch bounce

Supervisors Applications

• Microprocessor systems requiring reliable power supervision
• Controllers and intelligent instruments needing critical supply monitoring
• Computers and portable instrumentation utilizing 5 V or battery-powered architectures

Supervisors Procurement Notes

Verify the specific suffix 'TAR' against official Analog Devices documentation to confirm tape-and-reel packaging and exact threshold variants. Confirm RoHS compliance status and lead-free specifications directly with the manufacturer or authorized distributors before procurement. Ensure the operating temperature range meets system requirements.

Supervisors Selection Notes

Select this component when an active high reset signal is required for the target processor architecture. Compare the 4.40 V threshold against the system's nominal 5 V rail to ensure adequate margin. Consider the 190 μA quiescent current for low-power applications and verify that the 200 ms delay aligns with the microprocessor startup timing requirements.

Supervisors Part Context

The ADM708 belongs to the ADM705/ADM706/ADM707/ADM708 family of low-cost supervisory circuits. It serves as a successor or alternative to Maxim Integrated MAX705-MAX708 devices. The family shares common functionalities such as watchdog timers (in other variants) and manual reset inputs, differing primarily in output polarity and threshold voltages.

Supervisors Replacement Considerations

The MAX708 series is a documented equivalent from Analog Devices/Maxim. Verify pin compatibility and output polarity differences between the active-high ADM708 and potential active-low alternatives.