ADM691SQ

Supervisors Overview

The ADM691SQ is a microprocessor supervisory circuit from Analog Devices, designed for 5V CMOS process applications. It features a single monitored input with an open-drain output type and includes a watchdog timer and battery backup switch functionality. The device operates within a supply voltage range up to 5.5 V, with a threshold voltage of 4.65 V and an overvoltage threshold of 4.73 V. It provides a reset delay time of 200 ms and consumes 1.95 mA of operating supply current. The component supports chip enable signals and power failure detection without manual reset capability. It is housed in a 16-pin CERDIP package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates complete power supply monitoring and battery control on a single chip
• Includes programmable watchdog timer and battery backup switch for system protection
• Features open-drain output with configurable active levels and chip enable signal support

Supervisors Applications

• Microprocessor system supervision
• Power supply monitoring in industrial equipment
• Battery backup switching in embedded systems

Supervisors Procurement Notes

Verify the specific suffix 'SQ' indicates the ceramic DIP package variant when sourcing. Confirm availability status as distribution channels may list limited stock or end-of-life statuses. Ensure the datasheet matches the exact part number for pinout and electrical characteristics. Check for RoHS compliance documentation if required by your manufacturing standards. Validate that the open-drain output configuration meets your system's logic level requirements.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog and battery backup is required. The 16-pin CERDIP package suits through-hole mounting needs. Consider the 200 ms reset delay and 4.65 V threshold for compatibility with your target voltage rails. Verify that the open-drain output can interface correctly with your microprocessor reset line. Ensure the operating temperature range covers your environmental conditions.

Supervisors Part Context

The ADM691SQ belongs to the ADM690–ADM695 family of supervisory circuits from Analog Devices. This family provides comprehensive solutions for power supply monitoring and battery management. The SQ suffix typically denotes the ceramic dual in-line package (CERDIP) variant, distinguishing it from plastic SOIC versions like the ARZ. These devices are engineered for reliable operation in demanding electronic environments requiring robust voltage supervision.

Supervisors Replacement Considerations

Check for other members of the ADM69x family, such as ADM690 or ADM692, which may offer similar functionality with different thresholds or packages. Verify pin compatibility and electrical specifications before substituting. Consult Analog Devices documentation for approved cross-references or updated series replacements.