18QHTF21-109.380-PD

Overview

The 18QHTF21-109.380-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 109.38 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm. This component is engineered for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby and power-down functionality for energy management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation in digital circuits
• Timing reference for low-voltage microprocessors
• Data communication interface synchronization

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 power rails. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions. Cross-reference the part number suffix with the manufacturer's latest documentation to confirm availability and exact electrical specifications.

Selection Notes

Select this component when a 109.38 MHz clock source is required for LVCMOS-compatible logic families. The choice is driven by the need for a low-profile surface mount solution with integrated power management capabilities. Consider the operating temperature range and stability requirements relative to the application environment. Ensure compatibility with the 1.8V power supply infrastructure of the host system.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products. The series offers various frequencies within a standardized small outline package format. Mercury Electronics has been a pioneer in the crystal industry since 1973, providing reliable timing solutions. This specific model represents a standard XO variant optimized for modern low-power electronic designs.

Replacement Considerations

Direct substitutes must match the 109.38 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no-lead package dimensions. Verify pinout compatibility and thermal characteristics. Alternative parts from other manufacturers may require schematic adjustments if output drive strength or loading conditions differ significantly.