18QHTF21-68.665-OE

Overview

The 18QHTF21-68.665-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 68.665 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly. It supports an operating temperature range of -40°C to 85°C and maintains a frequency stability of ±50ppm.

Feature Summary

• LVCMOS output logic for standard digital interface compatibility
• Integrated enable/disable control functionality
• Compact 4-SMD no-lead surface mount package design

Applications

• General purpose clock generation in embedded systems
• Data communication interfaces requiring stable timing references
• Consumer electronics utilizing low-voltage logic families

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure the correct frequency tolerance and package variant. Confirm that the LVCMOS output type matches the target circuit requirements. Check the enable/disable pin configuration if active power management is required in the final design. Ensure the operating temperature range aligns with the environmental conditions of the intended application.

Selection Notes

Select this component when a precise 68.665 MHz reference is needed for 1.8V logic systems. Consider the ±50ppm stability requirement against the system's jitter budget. The small form factor makes it suitable for space-constrained PCB layouts. Evaluate the thermal performance within the specified -40°C to 85°C range for industrial or commercial environments.

Part Context

This part belongs to the 18QHTF21 series of standard oscillators from Mercury Electronics. The series offers various frequencies with consistent LVCMOS outputs and 1.8V operation. It is distinct from differential oscillator models like the H_K or H_EK series. The product line focuses on cost-effective, reliable timing solutions for mass-market electronic devices.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical electrical specifications but different frequencies, such as 18QHTF21-65.300-OE or 18QHTF21-96.768-OE, provided the frequency difference is acceptable. Cross-brand replacements require matching LVCMOS output, 1.8V supply, and 4-SMD package dimensions.