SP7618ER-L

Overview

The SP7618ER-L is a Supervisory Circuit manufactured by Sipex, designed to monitor voltage levels and provide reset signals for microprocessors. It operates within a supply voltage range of 2.0 V to 5.5 V, ensuring compatibility with various logic families. The device features a manual reset input for user-defined control and includes an open-drain output capable of sinking current from external pull-up resistors. It incorporates a built-in delay timer to prevent false resets during power-up sequences. The component is available in an 8-pin SOIC package, suitable for surface-mount applications requiring reliable system supervision.

Feature Summary

• Monitors supply voltage to ensure stable operation of digital circuits
• Provides active-low reset signal with configurable delay timer
• Includes manual reset input for system initialization control
• Features open-drain output interface for flexible logic integration

Applications

• Microprocessor system supervision
• Battery-powered equipment monitoring
• Embedded controller reset generation
• Power management circuit protection

Procurement Notes

Verify the manufacturer part number matches exactly 'SP7618ER-L' including the suffix. Confirm the package type is 8-SOIC. Check datasheet for specific delay time parameters if critical. Ensure RoHS compliance status aligns with project requirements. Validate operating temperature range against environmental conditions.

Selection Notes

Select this component when a dedicated voltage supervisor with manual reset capability is required. Consider the 2.0V minimum operating voltage for low-power applications. Evaluate the need for an open-drain output versus push-pull configurations. Compare delay times against system startup requirements. Assess package size constraints for PCB layout.

Part Context

This part belongs to the family of supervisory circuits designed for protecting microprocessor systems. It functions as a critical interface between power supplies and digital logic, ensuring orderly startup and shutdown procedures. Similar devices may offer different voltage thresholds or packaging options, but this specific model provides a balance of low voltage operation and manual control features.

Replacement Considerations

Check for direct cross-references from manufacturers like Maxim Integrated or Analog Devices. Verify pin-to-pin compatibility before substitution. Ensure threshold voltages and delay times match original design specifications. Confirm package dimensions and thermal characteristics are identical.

FAQ

What is the function of the manual reset input?

The manual reset input allows users to force the reset output low independently of the supply voltage level, enabling system initialization or recovery without power cycling.

How does the delay timer affect operation?

The internal delay timer ensures that the reset signal remains asserted for a specified duration after the supply voltage rises above the threshold, preventing premature release during unstable power-up conditions.