18QHTF21-7.39739-OE

Overview

The 18QHTF21-7.39739-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 7.39739 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 with dimensions of 3.2mm x 2.5mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Operates on a 1.8V supply voltage

Applications

• General clock signal generation in electronic circuits
• Timing reference for low-voltage digital systems
• Embedded devices requiring precise frequency control

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a stable 7.39739 MHz clock source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage as a primary constraint for power supply design. The enable/disable feature makes it suitable for battery-operated or power-sensitive applications where standby current reduction is necessary. Evaluate the small form factor against available board space.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series typically offers various frequencies within a compact SMD package. Mercury Electronics is a Taiwan-based supplier established in 1973, focusing on frequency control products including TCXOs and VCTCXOs. This specific model represents a standard XO variant optimized for low-voltage operation.

Replacement Considerations

Direct substitutes must match the 7.39739 MHz frequency, LVCMOS output, 1.8V supply, and 3.2x2.5mm package. Verify pinout compatibility if replacing with different manufacturers. No specific substitute part numbers are publicly confirmed in the provided data.