ADM705AR

Supervisors Overview

The ADM705AR is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed for monitoring 5V power supplies and battery systems. It features a precision voltage monitor with a threshold of 4.65V, ensuring reliable detection of under-voltage conditions. The device provides a 200ms reset pulse width to guarantee system stability during power transitions. It includes a debounced manual reset input and an independent watchdog timer with a 1.60-second timeout to prevent software lockups. Operating within a temperature range of -40°C to +85°C, it draws only 190μA quiescent current. The component is housed in an 8-SOIC surface-mount package.

Supervisors Feature Summary

• Integrated independent watchdog timer with 1.60-second timeout to detect and recover from microprocessor software failures
• Precision supply voltage monitoring at 4.65V threshold with guaranteed valid reset output down to 1V
• Debounced TTL/CMOS compatible manual reset input (MR) for user-initiated system resets
• Low power consumption with 190μA quiescent current suitable for battery-operated applications

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix 'AR' indicates the SOIC-8 surface mount package variant distinct from the PDIP version. Confirm RoHS compliance status as manufacturing statuses may vary. Check for obsolescence notices or end-of-life declarations prior to finalizing procurement plans. Ensure the source document explicitly supports the availability and specifications listed for this exact part number.

Supervisors Selection Notes

Select the ADM705AR when a surface-mount solution is required for microprocessor supervision with integrated watchdog capabilities. Choose this component over non-watchdog variants if software fault protection is necessary. Consider the 4.65V threshold specifically for 5V rail monitoring applications. Verify that the 8-SOIC package dimensions fit the target PCB layout constraints compared to through-hole alternatives.

Supervisors Part Context

The ADM705AR belongs to the ADM705/ADM706/ADM707/ADM708 series of low-cost microprocessor supervisory circuits. This family serves as a modern upgrade path for legacy MAX705-MAX708 devices, offering improved precision and lower power consumption. The ADM705 variant specifically distinguishes itself by including an independent watchdog timer, unlike the ADM707 which lacks this feature but offers active-high reset logic.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include ADM705ANZ for direct replacement in through-hole designs. For similar functionality in surface-mount packages, consider MAX705CPA+ or MAX705EPA+ from Maxim Integrated, noting potential differences in pinout or electrical characteristics.