ADM706AN

Supervisors Overview

The ADM706AN is a microprocessor supervisory circuit designed for monitoring 5 V power supplies and batteries. It features a precision voltage monitor with a threshold of 4.40 V and an independent watchdog timer with a 1.60-second timeout. The device provides a debounced manual reset input and guarantees a valid RESET signal down to VCC = 1 V. It operates within a temperature range of -40°C to +85°C, consumes 190 μA quiescent current, and delivers a 200 ms reset pulse width in an 8-pin PDIP package.

Supervisors Feature Summary

• Integrates an independent watchdog timer with a fixed 1.60-second timeout interval for system reliability.
• Provides a debounced TTL/CMOS compatible manual reset input to prevent false triggering.
• Ensures valid reset output signals even at low supply voltages as low as 1 V.

Supervisors Applications

• Microprocessor systems requiring critical supply monitoring
• Computers and controllers needing power-fail detection
• Intelligent instruments with battery backup requirements

Supervisors Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and electrical characteristics. Confirm RoHS compliance status for the specific manufacturing batch. Check lead times and availability as distribution channels may vary. Ensure the selected package matches the PCB footprint requirements. Validate that the operating temperature range meets the application environment specifications.

Supervisors Selection Notes

Select this component when a fixed 4.40 V threshold is required for 5 V systems. Choose the ADM706AN over adjustable supervisors for cost-sensitive designs. Consider the 190 μA quiescent current for battery-powered applications. Verify that the 200 ms reset delay aligns with the target processor's startup timing requirements.

Supervisors Part Context

The ADM706AN belongs to the ADM705/ADM706/ADM707/ADM708 family of low-cost supervisory circuits from Analog Devices. This series serves as a superior upgrade path for legacy MAX705-MAX708 components. The family offers various threshold voltages and output polarities to suit different microprocessor architectures.

Supervisors Replacement Considerations

Direct replacements include ADM705AN, ADM707AN, and ADM708AN. Verify threshold voltage compatibility (4.65 V vs 4.40 V) and output polarity (Active High vs Active Low). Ensure the replacement part supports the required manual reset and watchdog functionality.