18QHTF21-122.550-PD

Overview

The 18QHTF21-122.550-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 122.55 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a power-down capability with standby functionality to reduce energy consumption when not in active use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode for power reduction
• Utilizes a leadless surface-mount package

Applications

• General clock signal generation in electronic circuits
• Data communication systems requiring precise timing
• Embedded systems utilizing low-voltage logic

Procurement Notes

Verify the specific suffix 'PD' indicates the power-down feature as documented. Confirm the operating temperature range and load capacitance requirements against the target system design. Ensure the 1.8V supply rail matches the oscillator specifications. Check for RoHS compliance status if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a 122.55 MHz clock source is required with LVCMOS outputs. Consider the 1.8V supply constraint and the need for power-down functionality. Evaluate the 2.0x1.6 mm footprint against available PCB space. Compare performance metrics such as jitter and stability if detailed datasheet parameters are available for the specific application environment.

Part Context

This part belongs to the Mercury Electronics XO series, which offers various frequencies and package types. The 18QHTF21 prefix typically denotes a specific size and form factor within their catalog. Other variants in this series may differ in frequency, voltage, or output type while maintaining similar physical dimensions.

Replacement Considerations

Direct substitutes must match the 122.55 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics before substitution.