18QHTF21-61.500-OE

Overview

The 18QHTF21-61.500-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 61.5 MHz and utilizes LVCMOS output logic levels. The device is designed for low voltage applications, specifically requiring a 1.8V supply voltage. A key functional characteristic is the inclusion of an enable/disable control pin, allowing for power management and signal gating within the circuit. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Feature Summary

• Supports LVCMOS output interface for digital logic compatibility
• Features integrated enable/disable functionality for power control
• Operates on a single 1.8V power supply rail

Applications

• Digital clock generation in embedded systems
• Timing reference for microprocessors and FPGAs
• Communication interface synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target design specifications before procurement. Ensure that the 1.8V supply voltage aligns with the system's power distribution network. Confirm that the enable/disable pin logic levels are compatible with the controlling GPIO or logic signals to prevent unintended oscillation states or power consumption issues during operation.

Selection Notes

Select this component when a precise 61.5 MHz timing source is required for low-voltage digital circuits. The choice is driven by the need for LVCMOS compatibility and the ability to actively disable the oscillator output via a dedicated control pin. Consider the 4-SMD no-lead package dimensions for PCB layout constraints and thermal management requirements relative to other available oscillator packages.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series typically offers various frequencies with standardized LVCMOS outputs and low-voltage operation. The suffix indicates specific electrical characteristics and packaging details consistent with the manufacturer's standard product line for general-purpose timing applications.

Replacement Considerations

Direct replacements must match the 61.5 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and enable/disable logic polarity. Alternative parts from other manufacturers require careful evaluation of jitter specifications and operating temperature ranges to ensure functional equivalence.