18QHTF21-17.7776-PD

Oscillators Overview

The 18QHTF21-17.7776-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 17.7776 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Surface-mount 4-SMD no lead package

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded control circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no lead footprint matches your PCB layout constraints. Cross-reference the datasheet for operating temperature ranges to guarantee reliability under your specific environmental conditions.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS compatibility. The integrated power-down feature makes it suitable for battery-powered or energy-efficient designs. Consider the small form factor of the 4-SMD package for space-constrained layouts. Verify that the 17.7776 MHz frequency meets the exact clocking needs of the target application without additional dividers.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry. This series typically offers standard oscillators with various frequency options and voltage levels, catering to general-purpose electronic timing requirements across consumer and industrial electronics.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 variants with different frequencies such as 18QHTF21-51.200-PD or 18QHTF21-77.600-PD if frequency adjustment is permissible. Ensure any replacement maintains the same 1.8V supply, LVCMOS output, and 4-SMD package dimensions to fit existing footprints without redesign.