18QHTF21-49.5667-PD

Overview

The 18QHTF21-49.5667-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.5667 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and features a standby mode for power-down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range suitable for general electronic applications.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Includes standby functionality to reduce power consumption during idle states
• Utilizes a surface-mount package design for automated assembly integration

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power management circuits requiring low-voltage oscillation sources

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 to prevent assembly errors. Check for any specific RoHS compliance documentation if required by regional regulations.

Selection Notes

Select this component when a precise 49.5667 MHz timing source is required within a low-voltage environment. Consider the LVCMOS output swing levels to ensure compatibility with downstream logic gates. Evaluate the thermal performance within the specified operating temperature range. Compare alternative frequencies in the same series if exact matching is not critical.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent 1.8V operation and LVCMOS outputs. Similar models include variants like 18QHTF21-51.200-PD and 18QHTF21-67.000-PD, differing primarily in nominal frequency while maintaining identical package and electrical characteristics.

Replacement Considerations

Direct substitutes within the same series include 18QHTF21-49.5533-PD for similar high-frequency applications. Verify pinout compatibility and output logic levels when considering cross-brand replacements. Ensure the replacement maintains the 1.8V supply requirement and SMD form factor.