18QHTF21-3.490-OE

Oscillators Overview

The 18QHTF21-3.490-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a frequency of 3.49 MHz with an LVCMOS output signal. The device supports a supply voltage of 1.8V and features enable/disable functionality. Frequency stability is specified at ±50 ppm, and it functions within a temperature range of -40°C to +85°C. The component utilizes a 4-SMD, no lead package configuration.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Enable/Disable control function for power management
• Standard XO design with quartz base resonator

Oscillators Applications

• General purpose timing circuits
• Embedded systems requiring low-frequency clock sources
• Consumer electronics with 1.8V logic levels

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 operating temperature range meets the environmental conditions of the final application. Cross-reference the package dimensions with the PCB footprint to guarantee mechanical fit.

Oscillators Selection Notes

Select this component when a stable 3.49 MHz clock source is required for 1.8V logic systems. Consider the ±50 ppm stability for applications sensitive to timing drift. The enable/disable feature makes it suitable for battery-powered devices where power conservation is critical. Evaluate the thermal performance if the device will operate near the upper temperature limit.

Oscillators Part Context

Mercury Electronic Ind. Co. Ltd is a Taiwan-based manufacturer specializing in frequency control products, including quartz crystals and oscillators. The company has decades of experience in the industry, focusing on precision timing solutions. This part belongs to their standard XO series, designed for general electronic applications requiring reliable clock signals.

Oscillators Replacement Considerations

Direct substitutes include other 3.49 MHz LVCMOS oscillators with 1.8V operation and similar stability. Verify pinout compatibility and package dimensions before substitution. Ensure the replacement maintains the enable/disable functionality if required by the design.