18QHTF21-3.950-OE

Oscillators Overview

The 18QHTF21-3.950-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 3.95 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 supports an operating temperature range from -40°C to +85°C and maintains a frequency stability of ±50ppm.

Oscillators Feature Summary

• LVCMOS output interface with enable/disable functionality
• Compact 4-SMD no-lead surface mount package
• Low voltage operation at 1.8V
• Wide industrial temperature range support

Oscillators Applications

• Timing and clock signal generation in electronic devices
• Embedded systems requiring low-power oscillators
• Consumer electronics with space constraints

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 provided in the official datasheet. Check for any specific handling or storage conditions required for quartz components.

Oscillators Selection Notes

Select this model when a low-voltage, small-footprint oscillator is required for timing applications. The LVCMOS output is suitable for direct interfacing with digital logic inputs. Consider the ±50ppm stability if precise timing is not critical. The enable/disable feature allows for dynamic power saving in battery-operated devices. Compare against other Mercury series like H21 or SWO if different form factors are needed.

Oscillators Part Context

Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in frequency control products since 1973. The company produces quartz crystals, oscillators, filters, TCXOs, and VCTCXOs. The 18QHTF21 series represents their standard XO offerings designed for general-purpose timing needs in modern electronic equipment.

Oscillators Replacement Considerations

Direct substitutes may include other 3.95 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson, NDK, or SiTime. Verify pinout compatibility and electrical specifications such as supply voltage and current consumption. Cross-reference with Mercury's own product line for alternative frequencies or packages.