18QHTF21-78.125-OE

Overview

The 18QHTF21-78.125-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 78.125 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes 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

• Integrates LVCMOS output logic for digital interface compatibility
• Features active enable and disable control functionality
• Utilizes a leadless SMD package for board space efficiency

Applications

• Digital signal processing systems
• Communication equipment clocking
• Data acquisition modules

Procurement Notes

Verify the specific ordering suffix against official Mercury Electronics documentation to ensure correct voltage and output configuration. Confirm that the leadless package variant matches the target PCB footprint requirements. Cross-reference the part number with authorized distributors to validate authenticity and current manufacturing status before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The enable/disable pin allows for power management strategies in battery-operated devices. Ensure the design accommodates the thermal characteristics of the small form factor package during high-frequency operation.

Part Context

This model belongs to the Mercury Electronics XO series, which focuses on quartz-based timing solutions. The company specializes in frequency control products including crystals and oscillators. This specific part represents a standard frequency option within their portfolio of surface-mount timing devices.

Replacement Considerations

Direct substitutes must match the 78.125 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify electrical parameters such as load capacitance and drive level compatibility with the host circuit before substitution.