18QHTF21-65.813-PD

Overview

The 18QHTF21-65.813-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 65.813 MHz and utilizes LVCMOS output logic levels. The device is designed for low voltage applications, specifically requiring a 1.8V supply voltage. It features a standby mode function that allows for power down capabilities to reduce energy consumption when the oscillator is not in active use. The component is housed in a compact 4-SMD, No Lead package, suitable for surface mount assembly processes.

Feature Summary

• Supports LVCMOS output signal compatibility
• Includes standby mode for power down functionality
• Operates on a 1.8V supply voltage

Applications

• General clock signal generation
• Digital circuit timing reference
• Low voltage embedded systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply rail is stable and within the specified operating range. Ensure the PCB layout accommodates the 4-SMD No Lead package dimensions correctly to maintain signal integrity and thermal performance during operation.

Selection Notes

Select this model when a precise 65.813 MHz clock source is required for LVCMOS-compatible digital interfaces. Consider the 1.8V operating voltage constraint to ensure compatibility with low-power logic families. The integrated standby feature makes it suitable for battery-operated or power-sensitive applications where reducing quiescent current during idle periods is necessary.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series typically offers various frequencies and voltage options, all sharing the same compact 4-SMD form factor. Mercury Electronics has a history of manufacturing quartz crystals and frequency control products since 1973, positioning this component within their standard XO lineup.

Replacement Considerations

Direct substitutes must match the 65.813 MHz frequency, LVCMOS output type, 1.8V supply requirement, and 4-SMD No Lead package. Verify pinout compatibility and electrical specifications with alternative manufacturers if cross-referencing is needed.