18QHTF21-3.680-OE

Oscillators Overview

The 18QHTF21-3.680-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a nominal frequency of 3.68 MHz and utilizes LVCMOS output logic levels. The device is powered by a single 1.8V supply voltage and features an enable/disable control function for power management. It is housed in a compact 4-SMD, no-lead package suitable for surface-mount assembly. The component is designed to operate within a temperature range of -40°C to +85°C, ensuring reliability across industrial environments.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Enable/Disable pin functionality for power optimization
• Compact 4-SMD no-lead surface mount package
• Industrial temperature range operation capability

Oscillators Applications

• General-purpose timing reference for embedded systems
• Clock source for low-frequency microcontrollers
• Synchronization circuits in consumer electronics
• Industrial control system timing modules

Oscillators 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's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official datasheet to prevent soldering defects during assembly.

Oscillators Selection Notes

Select this component when a low-cost, standard frequency clock source is required for applications operating below 10 MHz. The LVCMOS output is suitable for direct interfacing with digital logic inputs without additional buffering. Consider the enable/disable feature if power conservation is critical. Verify that the ±50ppm stability typical for this series meets the system's jitter and accuracy requirements.

Oscillators Part Context

This part belongs to the QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, including 1.8V, 2.5V, and 3.3V variants. The '18' prefix indicates the 1.8V supply version, while '3.680' denotes the 3.68 MHz frequency. These oscillators are commonly used as alternative solutions to more expensive TCXOs in cost-sensitive designs.

Oscillators Replacement Considerations

Direct replacements must match the 4-SMD no-lead package, 1.8V supply, and LVCMOS output type. Verify frequency compatibility if substituting with other models in the QHTF21 series. Cross-reference pinout configurations to ensure electrical compatibility. Consult manufacturer cross-reference lists for verified equivalent parts.