18QHTF21-123.770-OE

Overview

The 18QHTF21-123.770-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 123.77 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features enable/disable functionality for power management
• Utilizes a leadless SMD package for automated assembly

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions to prevent mounting issues during assembly.

Selection Notes

Select this component when a 123.77 MHz reference is required with low-voltage operation. Consider the LVCMOS output swing limits relative to downstream logic levels. Evaluate the thermal performance within the intended operating temperature range to ensure long-term frequency stability under varying environmental conditions.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry, providing reliable timing solutions. This specific part represents a standard XO variant optimized for modern electronic devices requiring compact form factors.

Replacement Considerations

Direct substitutes must match the 123.77 MHz frequency, 1.8V supply, and LVCMOS output type. Verify pinout compatibility for the 4-SMD no-lead package. Cross-reference with other Mercury Electronics models or equivalent industry standards ensuring identical electrical parameters and mechanical dimensions.