18QHTF21-74.945-OE

Overview

The 18QHTF21-74.945-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 74.945 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

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

Applications

• General purpose clock signal generation
• Digital circuit timing reference
• Embedded system clock sources

Procurement Notes

Verify the specific frequency suffix matches the required 74.945 MHz specification. Confirm the 1.8V operating voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint corresponds to the PCB layout requirements. Check for any specific enable pin configuration needs in the final design.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS outputs. The enable/disable feature makes it suitable for systems needing power conservation or controlled clock activation. The small form factor supports high-density board designs where space is limited.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic, which offers various frequencies within a standardized 1.8V LVCMOS platform. The series provides consistent packaging and electrical characteristics across different frequency options, simplifying inventory management for multi-frequency designs.

Replacement Considerations

Direct substitutes must match the 74.945 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify that alternative components support the same enable/disable control mechanism and meet identical dimensional constraints for direct replacement.