ADM708TAN

Supervisors Overview

The ADM708TAN is a microprocessor supervisory circuit designed for monitoring power supplies and battery levels. It features a precision voltage monitor with a typical reset threshold of 4.40 V, suitable for 5 V systems. The device provides an active high push-pull reset output with a guaranteed reset pulse width of 200 ms. It includes a debounced manual reset input and operates within a supply voltage range of 1 V to 5.5 V. The quiescent current is typically 190 μA. The component supports industrial temperature operation from -40°C to +85°C and is housed in an 8-pin PDIP package.

Supervisors Feature Summary

• Precision supply voltage monitoring with guaranteed valid reset at low supply voltages
• Active high reset output with fixed 200 ms pulse width for reliable system initialization
• Debounced manual reset input compatible with TTL and CMOS logic levels
• Low quiescent current consumption for efficient power management

Supervisors Applications

• Microprocessor system power supervision
• Critical microprocessor supply monitoring
• Computer and controller systems
• Intelligent instruments requiring voltage tracking

Supervisors Procurement Notes

Verify the specific suffix 'TAN' against official Analog Devices documentation to confirm package type and temperature grade accuracy. Confirm availability status as legacy or end-of-life products may have restricted distribution channels. Ensure pinout compatibility with existing PCB layouts before procurement. Cross-reference with authorized distributors to validate authenticity and storage conditions.

Supervisors Selection Notes

Select this component when a fixed 4.40 V threshold is required for 5 V rail supervision. Consider the active high output polarity if interfacing with logic gates expecting high-level resets. Evaluate the 200 ms delay against system startup requirements. Compare against variants like ADM705/ADM706 if watchdog timer functionality is needed, as the ADM708 lacks this feature.

Supervisors Part Context

The ADM708 belongs to the ADM705-ADM708 family of low-cost microprocessor supervisory circuits. These devices are engineered to replace older MAX705-MAX708 equivalents while offering improved performance characteristics. The family shares common architectural features but differs in reset thresholds, output polarities, and additional functions like watchdog timers depending on the specific model number.

Supervisors Replacement Considerations

MAX708CPA+ and MAX708EPA+ are documented similar replacements. Verify electrical parameter alignment, specifically the 4.40 V threshold and 200 ms reset pulse, before substitution. Check package dimensions and pinout compatibility to ensure mechanical fit without PCB redesign.