18QHTF21-3.390-OE

Oscillators Overview

The 18QHTF21-3.390-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 3.39 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 function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly. It supports an operating temperature range from -40°C to 85°C and maintains a frequency stability of ±50ppm across the specified temperature range.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable control functionality
• Compact 4-SMD no-lead surface mount package
• Wide industrial operating temperature range

Oscillators Applications

• General clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Consumer electronics requiring low-power oscillators
• Industrial control equipment with wide temperature requirements

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 power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet. Check for any specific reflow soldering profile recommendations to ensure joint integrity during assembly processes.

Oscillators Selection Notes

Select this component when a precise 3.39 MHz timing source is required for LVCMOS-compatible digital circuits. Consider the ±50ppm stability specification to ensure it meets the jitter and accuracy requirements of the application. The enable/disable feature makes it suitable for battery-powered devices where power management is critical. Evaluate the thermal performance within the -40°C to 85°C range to guarantee reliability under varying environmental conditions.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency solutions. The model number indicates a 3.39 MHz frequency variant within the 18QHTF21 family. Similar parts in this series include variants with different frequencies such as 3.996 MHz and 6.300 MHz, all sharing the same package and electrical characteristics. This consistency allows for flexible design choices while maintaining mechanical and electrical compatibility across the product line.

Oscillators Replacement Considerations

Direct substitutes may include other 3.39 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as supply voltage and current consumption. Cross-reference with Mercury Electronics' own variants like the 18QHTF21-3.996-OE if frequency adjustment is permissible. Ensure that any replacement maintains the same enable/disable functionality and temperature range.