18QHTF21-79.3505-OE

Overview

The 18QHTF21-79.3505-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 79.3505 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring 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 on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Utilizes a leadless SMD package for space-constrained designs

Applications

• General clock signal generation in electronic systems
• Data communication interfaces requiring precise timing
• Embedded systems utilizing low-voltage logic families

Procurement Notes

Verify the specific suffix 'OE' against official Mercury Electronics documentation to confirm the exact enable/disable configuration and voltage tolerance. Ensure the operating temperature range meets system requirements. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the 4-SMD no-lead footprint matches the PCB layout specifications before finalizing procurement orders.

Selection Notes

Select this oscillator when a 79.3505 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V supply constraint and the need for active enable/disable control. Evaluate the thermal performance within the specified operating temperature range. Assess the physical dimensions of the 4-SMD package against available board real estate to ensure proper mechanical fit during integration.

Part Context

This component belongs to the Mercury Electronics XO series, which provides standard frequency references. The manufacturer has decades of experience in quartz crystal production. This specific model represents a low-profile solution for modern electronics requiring stable timing signals without the bulk of through-hole packages.

Replacement Considerations

Direct substitutes must match the 79.3505 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no-lead form factor. Verify pinout compatibility and electrical characteristics before substitution. Generic oscillators may lack the specific enable/disable feature or voltage tolerance.