18QHTF21-6.61125-OE

Overview

The 18QHTF21-6.61125-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 6.61125 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications. The component supports an operating temperature range of -40°C to 85°C and maintains a frequency stability of ±50ppm.

Feature Summary

• Supports active enable and disable control functionality
• Generates LVCMOS output signals
• Operates within a wide industrial temperature range

Applications

• General timing clock generation
• Digital signal processing circuits
• Communication interface modules

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 4-SMD no-lead package footprint matches the PCB layout specifications. Check for any specific reflow soldering profile recommendations provided in the manufacturer datasheet to ensure reliable assembly and long-term performance.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside precise timing stability. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the enable/disable feature if power management during idle states is necessary. The wide temperature range makes it appropriate for industrial environments where thermal variations are expected.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronic. The series offers various frequencies and voltage options, including 1.8V, 2.5V, and 3.3V variants. These components are designed for applications requiring stable clock signals in compact electronic devices. The manufacturer specializes in quartz crystals and timing solutions.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with compatible pinouts and electrical characteristics. Verify that alternative models match the 1.8V supply requirement and LVCMOS output type. Cross-reference the frequency stability and operating temperature range to ensure equivalent performance in the specific application environment.