18QHTF21-8.334959-OE

Overview

The 18QHTF21-8.334959-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 8.334959 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications with a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly in space-constrained electronic designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Utilizes a leadless SMD package for surface-mount integration

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Low voltage embedded systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with the target system design. Confirm that the enable/disable pin configuration matches the control logic available in the host circuit to ensure proper operation and power state management.

Selection Notes

Select this component when a precise 8.334959 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage constraint and the need for active enable/disable control. The small form factor makes it appropriate for dense PCB layouts where space is limited compared to larger through-hole or standard SMD packages.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's quartz industry. This specific model represents a standard XO variant within their portfolio, distinguished by its specific frequency and low-voltage capabilities.

Replacement Considerations

Direct substitutes must match the 8.334959 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no-lead package dimensions. Verify pinout compatibility and electrical specifications such as phase noise and jitter if critical. Cross-reference with other manufacturers offering identical frequency and package constraints.