18QHTF21-68.100-OE

Overview

The 18QHTF21-68.100-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 68.1 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 requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable and disable control functionality
• Standard crystal oscillator design with quartz type construction

Applications

• Digital signal processing systems
• Communication equipment timing references
• Embedded microcontroller clock sources

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target application circuit 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 to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a stable 68.1 MHz reference is required for LVCMOS-compatible digital circuits. The 1.8V supply voltage makes it suitable for low-power portable devices. Consider the enable/disable feature if power management or clock gating is necessary within the system architecture. Verify thermal performance limits for the intended operating environment.

Part Context

This part belongs to the Mercury Electronics XO series, which includes various frequencies and packages. The 18QHTF21 prefix indicates a specific form factor and electrical characteristic set within their oscillator lineup. Mercury Electronics has a history of manufacturing quartz crystals and oscillators, positioning this component as a standard timing solution for industrial and consumer electronics.

Replacement Considerations

Direct replacements must match the 68.1 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Check pinout compatibility and electrical parameters such as phase noise and jitter. Alternative parts from other manufacturers require verification of functional equivalence and physical dimensions.