18QHTF21-65.538-PD

Overview

The 18QHTF21-65.538-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 65.538 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with integrated standby functionality
• Delivers stable LVCMOS output signals for digital circuits
• Utilizes a leadless SMD package for automated assembly

Applications

• General-purpose clock generation for embedded systems
• Timing reference for microcontrollers and processors
• Data communication interface synchronization

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 4-SMD no-lead footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under your environmental conditions.

Selection Notes

Select this component when a 65.538 MHz clock source is required for LVCMOS-compatible logic families. The choice is driven by the need for a low-profile, leadless surface-mount solution. Consider the 1.8V supply requirement and standby feature if power efficiency is a priority. Verify compatibility with the target application's jitter specifications and phase noise requirements using the manufacturer's technical documentation.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a consistent 4-SMD form factor. Mercury Electronics specializes in quartz-based frequency control products, providing timing solutions for consumer electronics and industrial applications through standardized oscillator designs.

Replacement Considerations

Direct substitutes include other 65.538 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical parameters such as rise/fall times and duty cycle. Cross-reference with Mercury's own catalog for alternative suffixes or similar series members like the H21 or SWO lines if mechanical or electrical adjustments are needed.