18QHTF21-122.767857-PD

Overview

The 18QHTF21-122.767857-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 122.767857 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications with a supply voltage of 1.8V. It features a standby or power-down function to conserve energy when not in active use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This surface-mount technology ensures compatibility with modern automated assembly processes.

Feature Summary

• Integrates a standby (power down) function for efficient energy management during inactive periods.
• Delivers standard LVCMOS output logic suitable for digital signal processing interfaces.
• Utilizes a compact 4-SMD, No Lead surface-mount package for space-constrained designs.

Applications

• Low-power embedded systems requiring precise timing references
• Digital communication equipment utilizing LVCMOS interfaces
• Portable electronic devices where size and power consumption are critical

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable joint formation.

Selection Notes

Select this component when a precise 122.767857 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage and low current consumption as primary advantages for battery-operated or energy-efficient designs. The small form factor makes it suitable for dense board layouts. Evaluate the need for the standby feature if power management during idle states is a priority for the application.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series is characterized by its transition to surface-mount technology and expanded frequency ranges. Mercury has been a pioneer in Taiwan for quartz crystal manufacturing since 1973, providing a range of oscillators from kHz to hundreds of MHz.

FAQ

What is the output logic type for this oscillator?

The 18QHTF21-122.767857-PD uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic.

Does this component support power saving modes?

Yes, the device includes a standby (power down) function to reduce power consumption when the oscillator is not actively needed.