18QHTF21-49.440-PD

Overview

The Mercury Electronics Ind. Co. Ltd part number 18QHTF21-49.440-PD is a 49.44 MHz LVCMOS crystal oscillator (XO). It operates at a supply voltage of 1.8V and features an integrated power-down function for standby mode control. The device utilizes a surface-mount package with dimensions of 2.0 x 1.6 mm and no leads. This component is designed for timing applications requiring precise frequency generation within compact electronic systems.

Feature Summary

• Generates a standard 49.44 MHz clock signal using LVCMOS output logic levels.
• Supports active standby operation through a dedicated power-down pin interface.

Applications

• Embedded system clock generation
• Digital signal processing timing
• Communication module synchronization

Procurement Notes

Verify the exact operating temperature range and load capacitance requirements against your specific circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 2.0x1.6mm footprint matches your PCB layout constraints. Cross-reference the datasheet for any specific drive level limitations to prevent frequency instability or component degradation during operation.

Selection Notes

Select this component when a low-voltage, small-footprint oscillator is required for high-frequency timing. The 1.8V supply makes it suitable for modern portable and battery-operated devices. Consider the power-down feature if energy efficiency during idle states is critical. Compare against other Mercury series parts to ensure the 49.44 MHz frequency meets your system's clocking needs without additional dividers.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based timing solutions. The series includes various frequencies and packages, catering to diverse consumer and industrial electronics. As a Taiwan-based supplier, Mercury provides components for global markets, focusing on reliability and precision in frequency control applications across multiple industries.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by matching electrical parameters such as voltage, frequency, and package size before considering alternative sources.