18QHTF21-68.084-PD

Overview

The 18QHTF21-68.084-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 68.084 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode with power-down capability to reduce energy consumption when not in active use. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface for digital signal compatibility
• Integrated standby function with power-down control
• Compact 4-SMD no-lead surface mount package design

Applications

• General purpose timing clock generation
• Digital signal processing circuits
• Communication equipment baseband modules

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent assembly errors.

Selection Notes

Select this component when a precise 68.084 MHz reference clock is required for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage constraint and ensure the power budget accommodates the active current draw. The choice depends on the need for a standard XO with standby capabilities rather than temperature-compensated or voltage-controlled variants.

Part Context

This part belongs to the Mercury Electronics SMD oscillator series, which provides standard frequency references for electronic systems. The '18' prefix typically indicates the 1.8V supply voltage variant within their product line. These oscillators are widely used in consumer electronics and industrial control systems where stable timing signals are essential for synchronous data transfer.

Replacement Considerations

Direct substitutes must match the 68.084 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering identical electrical parameters and mechanical form factors to ensure seamless integration without redesign.