ADM705AN

Supervisors Overview

The ADM705AN is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed for monitoring 5V power supplies and batteries. It features a precision voltage monitor with a threshold of 4.65V, ensuring reliable system reset generation. The device includes an independent watchdog timer with a 1.60-second timeout to prevent software lockups. It provides a debounced manual reset input and guarantees a valid RESET signal down to VCC = 1V. The component operates within a temperature range of -40°C to +85°C and is housed in an 8-PDIP package.

Supervisors Feature Summary

• Integrated independent watchdog timer with 1.60-second timeout capability
• Precision supply voltage monitoring at 4.65V threshold
• Debounced TTL/CMOS manual reset input functionality
• Guaranteed valid reset output at low supply voltages

Supervisors Applications

• Microprocessor systems requiring stable power supervision
• Computer hardware protection circuits
• Industrial controllers needing watchdog protection
• Intelligent instruments with critical supply monitoring

Supervisors Procurement Notes

Verify the obsolete status of the ADM705AN before procurement planning. Confirm availability of direct replacements such as the ADM705ANZ or compatible MAX705 variants. Ensure design updates account for potential lead time changes associated with end-of-life components. Validate pin compatibility if substituting with newer packages like SOIC.

Supervisors Selection Notes

Select this component for applications requiring integrated watchdog timer functionality alongside voltage supervision. Consider the 8-PDIP package for through-hole mounting requirements. Evaluate the 4.65V threshold against specific 5V rail tolerances. Verify that the 190μA quiescent current meets system power efficiency targets compared to alternative supervisors.

Supervisors Part Context

The ADM705AN belongs to the ADM705/ADM706/ADM707/ADM708 series of low-cost microprocessor supervisory circuits from Analog Devices. This series serves as a superior upgrade path for legacy MAX705 to MAX708 devices, offering improved accuracy and lower power consumption. The ADM705 variant specifically distinguishes itself by including an independent watchdog timer feature not present in all family members.

Supervisors Replacement Considerations

The ADM705ANZ is listed as a direct replacement for the ADM705AN. Other similar alternatives include the MAX705CPA+ and MAX705EPA+. Verify package compatibility and electrical specifications when transitioning between these part numbers.