18QHTF21-40.680-PD

Oscillators Overview

The 18QHTF21-40.680-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 40.68 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 during inactive periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby capability for power management
• Provides LVCMOS output signal compatibility

Oscillators Applications

• General-purpose clock generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB layout accommodates the 4-SMD no-lead package dimensions to prevent soldering defects. Cross-reference the part number suffix PD with manufacturer documentation to confirm any specific handling or storage instructions.

Oscillators Selection Notes

Select this component when a stable 40.68 MHz clock source is required for LVCMOS-compatible logic circuits. Consider the 1.8V operating voltage constraint to ensure compatibility with low-power system architectures. Evaluate the need for standby functionality if power efficiency is a critical design parameter. Verify that the 4-SMD form factor fits within the available board space constraints.

Oscillators Part Context

This oscillator belongs to the Mercury Electronics 18QHTF21 series, which offers various standard frequencies. The series is characterized by its small footprint and low voltage operation. Mercury Electronics has a long history in quartz crystal manufacturing, providing reliable frequency control solutions for industrial and consumer electronics markets.

Oscillators Replacement Considerations

Direct substitutes include other 40.68 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Ensure replacement parts match the 1.8V supply voltage and pin configuration. Verify that alternative components offer similar phase noise and stability characteristics to maintain system performance.