ADM8690ARN

Supervisors Overview

The ADM8690ARN is a microprocessor supervisory circuit manufactured by Analog Devices Inc., housed in an 8-SOIC surface-mount package. It features a fixed threshold voltage of 4.65 V and operates within a supply voltage range up to 5.5 V. The device provides active low push-pull reset output with a 50 ms reset delay time. Key functional parameters include a watchdog timer, battery backup switching capability, and power failure detection. It draws 200 uA of operating current and maintains accuracy within 2.5%. The component supports an operating temperature range from -40 C to +85 C.

Supervisors Feature Summary

• Integrates complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems
• Provides automatic battery backup power switching with extremely fast gating of chip enable signals
• Includes a configurable watchdog timer and CMOS RAM write protection capabilities
• Offers precision voltage monitoring with reset assertion down to low supply voltages

Supervisors Applications

• Microprocessor system power supervision
• Battery backup switchover management
• CMOS RAM write protection circuits
• Power failure warning systems

Supervisors Procurement Notes

Verify the specific suffix 'ARN' against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Confirm end-of-life status as some sources indicate this variant may be obsolete or discontinued. Ensure the selected replacement part matches the required SOIC-8 package dimensions and electrical thresholds before integration into existing designs.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for precise voltage monitoring without external resistor networks. Consider the integrated watchdog timer and battery backup features if space constraints prevent discrete implementation. Verify that the 200 uA standby current meets the system's power budget requirements during sleep modes.

Supervisors Part Context

The ADM8690 belongs to the ADM8690–ADM8695 family of supervisory circuits designed to replace earlier generations like the ADM690. This family offers various configurations to satisfy most microprocessor system requirements, including different reset delays and watchdog options. The ADM8690 specifically targets applications requiring a fixed threshold voltage monitor with integrated backup switching.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include ADM709LARZ, ADM8699ARNZ, MAX705ESA+, and MAX709LESA+.