18QHTF21-108.720-PD

Overview

The 18QHTF21-108.720-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 108.72 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode for power down functionality to reduce energy consumption during inactive periods. The component is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This surface-mount configuration facilitates automated assembly and integration into space-constrained electronic designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode capability for power management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct voltage and frequency specifications. Confirm that the 1.8V supply requirement aligns with the target circuit design. Check for any updated datasheet revisions that may affect pinout or electrical characteristics. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Validate that the LVCMOS output levels are compatible with the receiving logic inputs.

Selection Notes

Select this component when a precise 108.72 MHz timing source is required for low-power applications. The 1.8V operating voltage makes it suitable for modern battery-operated or low-voltage digital circuits. The small 2.0 x 1.6 mm package is ideal for high-density board layouts. Consider the standby feature if power efficiency during idle states is a critical design parameter. Ensure the LVCMOS output swing meets the noise margin requirements of the connected components.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized small form factor. The series typically supports multiple supply voltages and output types, but this specific model is configured for 1.8V LVCMOS operation. The 'PD' suffix likely indicates a specific packaging or tape-and-reel configuration, though exact details require datasheet confirmation. The product line emphasizes reliability and precision for industrial and consumer electronics.

Replacement Considerations

Direct substitutes must match the 108.72 MHz frequency, 1.8V supply, and LVCMOS output. Compatible packages include 4-SMD no-lead variants with identical 2.0 x 1.6 mm dimensions. Verify that alternative sources provide equivalent stability and phase noise specifications. Ensure the replacement part supports the same standby functionality if power management is required.