18QHTF21-124.450-PD

Overview

The 18QHTF21-124.450-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 124.45 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output interface for standard digital logic compatibility
• Supports standby mode operation to reduce power consumption when not in use
• Utilizes a leadless SMD package design for efficient surface-mount assembly

Applications

• General purpose timing signal generation in electronic circuits
• Clock source provision for digital systems requiring 1.8V logic levels
• Embedded devices utilizing surface-mount technology constraints

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 2.0x1.6 mm 4-SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a fixed frequency of 124.45 MHz is required with low-voltage operation. Consider the LVCMOS output type for direct interfacing with standard logic families without additional buffering. Evaluate the need for power-down functionality if energy efficiency is critical for the application environment compared to continuous oscillation alternatives.

Part Context

This part belongs to the Mercury Electronics XO series, which focuses on quartz-based frequency control products. The manufacturer has a history of producing quartz crystals and oscillators since 1973. The 18QHTF21 series represents their standard surface-mount oscillator offerings, providing reliable timing solutions for various industrial and consumer electronics applications.

Replacement Considerations

Direct substitutes include other 124.45 MHz LVCMOS oscillators in similar packages from different manufacturers. Verify pinout compatibility and electrical characteristics such as rise/fall times and drive strength. Cross-reference with Mercury Electronics' own variants like the 18QHTF21-124.412-PD if slight frequency adjustments are permissible within the system design.