18QHTF21-123.345339-PD

Overview

The 18QHTF21-123.345339-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 123.345339 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down control function to manage power consumption. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby and power-down functionality
• Compact 4-SMD no-lead surface mount package

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. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official datasheet to guarantee proper solder joint formation and mechanical stability during assembly.

Selection Notes

Select this component when a precise 123.345339 MHz reference is required with low-power standby capabilities. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the 1.8V operating voltage constraint and ensure the application environment supports the specified temperature range for reliable oscillator performance.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies with standardized LVCMOS outputs and 1.8V operation. The '-PD' suffix indicates the inclusion of a power-down feature, distinguishing it from models without standby control within the same physical package family.

Replacement Considerations

Direct replacements must match the 123.345339 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if available in public documentation.