18QHTF21-123.520-PD

Overview

The 18QHTF21-123.520-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 123.52 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with integrated standby capability
• Provides stable LVCMOS signal output for digital interfaces
• Utilizes leadless surface-mount packaging for automated assembly

Applications

• High-speed data communication systems
• Network infrastructure equipment
• Consumer electronics requiring precise clocking

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable within the datasheet limits. Ensure the PCB footprint matches the 4-SMD No Lead dimensions exactly to avoid soldering defects during reflow processes.

Selection Notes

Select this component when a 123.52 MHz reference is required with low power consumption constraints. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the operating temperature range specified in the official documentation to ensure reliability under environmental stress conditions.

Part Context

This model belongs to the Mercury Electronics XO series, characterized by small form factors and low voltage operation. The 'PD' suffix typically indicates the inclusion of a power-down control feature, distinguishing it from continuous-operation variants within the same frequency family.

Replacement Considerations

Direct substitutes must match the 123.52 MHz frequency, 1.8V supply, and 4-SMD No Lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications to ensure functional equivalence in the target application.