18QHTF21-19.668-OE

Oscillators Overview

The 18QHTF21-19.668-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 19.668 MHz and utilizes LVCMOS output logic levels. The device supports an enable/disable control function for power management efficiency. It is designed for operation with a supply voltage of 1.8V. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Oscillators Feature Summary

• Supports active low or high enable/disable control for power optimization
• Generates LVCMOS compatible clock signals
• Utilizes a leadless SMD package for automated placement

Oscillators Applications

• Portable electronic devices requiring low-power clock sources
• Embedded systems utilizing 1.8V logic families
• Consumer electronics with space-constrained PCB layouts

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 can maintain stable voltage under peak current conditions to ensure oscillator stability. Ensure the manufacturing date code meets project longevity requirements.

Oscillators Selection Notes

Select this component when a precise 19.668 MHz reference is required alongside strict power consumption limits. The 1.8V operating voltage makes it suitable for modern low-voltage digital interfaces. Consider the small footprint if board real estate is limited compared to larger oscillator packages.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in Taiwan producing crystals and oscillators. This series typically targets applications needing reliable timing solutions in compact form factors.

Oscillators Replacement Considerations

Direct substitutes include other 19.668 MHz LVCMOS oscillators in 4-SMD no-lead packages with 1.8V operation. Verify pin compatibility and enable signal polarity before swapping.