18QHTF21-124.75625-PD

Overview

The 18QHTF21-124.75625-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 124.75625 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals within space-constrained electronic systems.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Integrates standby and power-down functionality to reduce power consumption
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing circuits requiring precise timing
• Communication equipment utilizing high-frequency clock sources
• Embedded systems with strict size and power constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply voltage aligns with your power management architecture. Confirm that the 4-SMD no-lead package footprint matches your PCB layout specifications. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly and long-term performance stability.

Selection Notes

Select this component when a fixed frequency of 124.75625 MHz is required with low voltage operation. Consider the LVCMOS output level for direct interfacing with compatible digital logic families. Evaluate the physical dimensions of the 2.0x1.6mm package against available board space. Assess the need for power-down capabilities if battery life or thermal management is a critical design factor compared to continuous operation oscillators.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series is characterized by small form factors and low power consumption. The 'PD' suffix indicates the inclusion of a power-down pin or control feature. These oscillators are engineered for consumer electronics and portable devices where size and efficiency are paramount.

Replacement Considerations

Direct replacements must match the 124.75625 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical parameters such as phase noise and jitter specifications. Ensure the substitute component also supports the standby/power-down function if required by the design.