18QHTF21-77.7776-OE

Overview

The 18QHTF21-77.7776-OE is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 77.7776 MHz and utilizes LVCMOS output logic with an Enable/Disable control function. The device is powered by a 1.8V supply voltage and is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Provides stable clock generation via LVCMOS output interface
• Includes hardware enable/disable functionality for power management
• Designed for surface-mount assembly in space-constrained applications

Applications

• Timing and clock generation circuits
• Digital signal processing systems
• Communication equipment requiring precise frequency references

Procurement Notes

Verify the specific suffix 'OE' corresponds to the required Enable/Disable feature and LVCMOS output type. Confirm that the 1.8V operating voltage aligns with the target system's power rails. Ensure the 2.0x1.6mm footprint matches the PCB layout design before procurement.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside an enable pin for power control. The small 2.0x1.6mm package makes it suitable for dense circuit boards. Consider the 77.7776 MHz frequency requirement specifically for timing applications needing this exact rate.

Part Context

Mercury Electronics specializes in quartz crystals and oscillators, including TCXOs and VCTCXOs. This part belongs to their standard XO line, offering reliable frequency control solutions. The manufacturer has decades of experience in Taiwan's frequency control industry, providing various packaging options for different application needs.

Replacement Considerations

Direct substitutes must match the 77.7776 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm SMD package. Verify that any alternative also includes the Enable/Disable control feature to maintain system power management capabilities.