18QHTF21-49.090909-OE

Overview

The 18QHTF21-49.090909-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.090909 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports enable/disable functionality for power management
• Utilizes LVCMOS output logic for digital interface compatibility
• Compact surface-mount design suitable for space-constrained applications

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing standard frequency references
• Embedded systems with low-voltage logic requirements

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to prevent assembly issues. Cross-reference the manufacturer's datasheet for detailed electrical characteristics and reliability data.

Selection Notes

Select this component when a stable 49.090909 MHz reference is required in a low-profile form factor. The LVCMOS output ensures compatibility with standard digital logic families. Consider the enable pin feature if dynamic power saving is necessary. Evaluate the operating temperature range to ensure performance stability under expected environmental conditions.

Part Context

This model belongs to the QHTF series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within similar small packages. The 'OE' suffix typically denotes specific packaging or testing configurations as defined by the manufacturer. This part represents a standard solution for general-purpose clock generation in modern electronics.

Replacement Considerations

Direct substitutes must match the 49.090909 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical specifications before swapping. Alternative parts may require firmware adjustments if timing parameters differ slightly.