18QHTF21-7.87443-OE

Overview

The 18QHTF21-7.87443-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.87443 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage range that includes 1.8V operation and features an enable/disable control function for power management. It is housed in a compact 4-SMD, no lead surface-mount package, designed for integration into space-constrained electronic circuits requiring precise timing signals.

Feature Summary

• Supports LVCMOS output interface for digital logic compatibility
• Includes enable/disable pin for active power management
• Compact 4-SMD no-lead surface mount package design

Applications

• General purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Digital communication interface synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly errors. Cross-reference the manufacturer's datasheet for absolute maximum ratings to ensure operational reliability under varying environmental conditions.

Selection Notes

Select this component when a low-voltage LVCMOS output is required for digital interfaces. The enable/disable feature makes it suitable for battery-powered applications where power conservation is critical. Consider the small form factor for dense PCB layouts. Verify that the operating temperature range meets the application's environmental specifications. Compare alternative frequencies if the exact 7.87443 MHz value is not strictly necessary for the system clock.

Part Context

This oscillator belongs to the Mercury Electronics SMD oscillator series, which focuses on providing reliable timing solutions in compact packages. The company has extensive experience in quartz crystal manufacturing. This specific model represents a standard XO variant optimized for modern low-voltage digital electronics. It complements their broader portfolio of frequency control products including crystals and differential oscillators.

Replacement Considerations

Direct replacements must match the 7.87443 MHz frequency, LVCMOS output type, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as current consumption. Check if alternative manufacturers offer equivalent enable/disable functionality. Ensure the replacement part meets the same mechanical and thermal specifications for seamless integration.