18QHTF21-21.444215-PD

Oscillators Overview

The 18QHTF21-21.444215-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.444215 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is engineered for applications requiring precise timing signals within space-constrained electronic systems.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with integrated standby capability
• Delivers stable LVCMOS output signals for digital circuit synchronization
• Utilizes a miniature surface-mount package for high-density PCB layouts

Oscillators Applications

• High-speed data communication interfaces requiring precise clocking
• Portable consumer electronics with strict size and power constraints
• Embedded systems utilizing LVCMOS-compatible processors

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD no-lead footprint matches your PCB silkscreen and solder mask definitions. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly and long-term performance.

Oscillators Selection Notes

Select this component when a fixed 21.444215 MHz clock source is required for LVCMOS logic families. Consider the 1.8V operating voltage as a primary constraint for compatibility with modern low-power ICs. Evaluate the physical dimensions of the 2.0 x 1.6 mm package against available board space. The presence of a power-down feature makes it suitable for battery-operated devices where standby current reduction is critical for extending operational life.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series is characterized by small form factors and low power consumption, targeting the mobile and portable electronics markets. Mercury Electronics has established itself as a pioneer in the Taiwanese quartz industry, offering standardized solutions for various timing needs across different industrial sectors.

Oscillators FAQ

Does the -PD suffix indicate a change in electrical function?

No, the suffix typically denotes packaging or tape-and-reel configuration details rather than altering the core electrical specifications or output logic.

What is the output logic type for this model?

The 18QHTF21-21.444215-PD uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic.