18QHTF21-71.4376-PD

Overview

The 18QHTF21-71.4376-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 71.4376 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption when inactive. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down control for energy efficiency
• Provides standard LVCMOS signal output

Applications

• Digital clock distribution systems
• Data communication interfaces requiring precise timing
• Embedded processor clock sources

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 and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a 71.4376 MHz reference is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage constraint and the need for a power-down feature. Evaluate the small form factor suitability for space-constrained designs compared to larger oscillator packages.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, typically packaged in small SMD footprints. The 'PD' suffix indicates the inclusion of a power-down pin or functionality, distinguishing it from continuous-operation variants within the same family.

Replacement Considerations

Direct substitutes must match the 71.4376 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise if replacing with components from other manufacturers.