18QHTF21-44.490-PD

Oscillators Overview

The 18QHTF21-44.490-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 44.49 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) control function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component serves as a precise clock source for digital circuits requiring low voltage operation and minimal footprint.

Oscillators Feature Summary

• Integrates LVCMOS output logic for direct interfacing with digital systems
• Includes standby mode capability via power-down control pin
• Utilizes a lead-free surface-mount package for automated assembly

Oscillators Applications

• Clock generation for communication interfaces
• Timing reference for embedded microprocessors
• Synchronization sources for consumer electronics

Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required voltage levels and load capacitance. Confirm that the lead-free finish meets project environmental standards. Cross-reference the package outline drawing with PCB footprints to guarantee mechanical fit during procurement.

Oscillators Selection Notes

Select this component when a 44.49 MHz frequency is strictly required for system timing. Ensure the design supports the 1.8V supply rail and accommodates the 2.0x1.6 mm footprint. Consider the LVCMOS drive strength requirements of the downstream circuitry to verify signal integrity without additional buffering.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency oscillators. The 18QHTF21 prefix indicates the specific series characteristics, while the numeric suffix denotes the exact operating frequency. The PD suffix confirms the inclusion of power-down functionality within the package.

Oscillators Replacement Considerations

Direct substitutes include other 44.49 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify equivalent electrical parameters such as supply voltage and output logic before substitution.