18QHTF21-49.3533-PD

Overview

The 18QHTF21-49.3533-PD is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.3533 MHz with a supply voltage of 1.8V. The device features a power-down function and is housed in a compact 4-SMD, No Lead package measuring 2.0x1.6mm. This component is designed for timing applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• Provides stable 49.3533 MHz clock signal via LVCMOS output logic
• Integrates power-down capability for energy management
• Utilizes low-profile surface-mount packaging for board space efficiency

Applications

• Digital signal processing circuits
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package dimensions fit within the designated footprint on the printed circuit board to avoid mechanical interference during assembly.

Selection Notes

Select this model when a low-voltage, small-footprint oscillator is required for 49.3533 MHz applications. Consider the LVCMOS output compatibility with downstream logic levels. Evaluate the power-down feature if dynamic power management is critical. Compare against other Mercury series oscillators for alternative frequencies or package sizes if specifications do not fully match the design constraints.

Part Context

This part belongs to the Mercury 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies and supply voltages, catering to diverse timing needs in modern electronics. Mercury Electronics specializes in frequency control products, providing reliable quartz-based solutions for industrial and consumer markets.

Replacement Considerations

Direct substitutes include other 49.3533 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify pinout compatibility and electrical parameters such as rise/fall times and duty cycle. Cross-reference with Mercury's own product line for updated revisions or alternative series members offering similar performance characteristics.