18QHTF21-71.680-PD

Overview

The 18QHTF21-71.680-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 71.68 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise timing signals in space-constrained electronic systems.

Feature Summary

• Supports Standby (Power Down) mode for power management
• Utilizes LVCMOS output logic levels
• Compact 4-SMD No Lead surface mount package

Applications

• Battery-powered portable devices
• General purpose clock signal generation
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator specifications. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package dimensions to avoid assembly issues during manufacturing.

Selection Notes

Select this model when a low-voltage 1.8V operation is required alongside a specific 71.68 MHz frequency. Consider the small form factor for dense PCB layouts. Evaluate the need for standby functionality if power conservation is critical. Compare against other Mercury oscillators in the QHTF series for alternative frequencies or package sizes if this exact specification does not fit the design constraints.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series typically offers various frequencies with LVCMOS outputs and low voltage operation. The 'PD' suffix indicates the inclusion of a power-down feature. Mercury Electronics has been a manufacturer of frequency control products since 1973, positioning itself as a pioneer in the Taiwan crystal industry.

Replacement Considerations

Direct substitutes within the same series include models such as 18QHTF21-8.000-PD, 18QHTF21-80.000-PD, and 18QHTF21-96.768-PD, which share identical packaging and electrical characteristics but differ in operating frequency. Ensure the replacement maintains the 1.8V supply and LVCMOS output compatibility.