18QHTF21-66.008-PD

Overview

The 18QHTF21-66.008-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 66.008 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes power-down standby capability to reduce power consumption
• Utilizes a small form factor 4-SMD no-lead package design

Applications

• Digital signal processing systems requiring precise clock references
• Communication equipment utilizing standard frequency protocols
• Embedded systems operating on 1.8V power supplies

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 2.0 x 1.6 mm SMD package dimensions. Check for any specific handling instructions related to the no-lead package type during assembly.

Selection Notes

Select this component when a 66.008 MHz clock source is required for LVCMOS-compatible devices. Consider the 1.8V operating voltage constraint and the availability of power-down functionality for power-sensitive designs. Evaluate the physical space constraints to accommodate the 4-SMD no-lead package size. Compare performance metrics such as phase noise and stability if available in official documentation.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd., which offers various frequencies within a standardized 1.8V LVCMOS format. The series typically includes models like 18QHTF21-8.000-PD and 18QHTF21-96.768-PD, sharing similar package and electrical characteristics but differing in output frequency. The 'PD' suffix indicates the inclusion of a power-down feature.

Replacement Considerations

Direct substitutes include other 18QHTF21 series oscillators with identical pinout and voltage levels, such as 18QHTF21-68.080-PD or 18QHTF21-51.200-PD, provided the frequency difference is acceptable. Cross-reference with other manufacturers offering 66.008 MHz LVCMOS oscillators in 2.0x1.6mm packages, ensuring voltage and logic compatibility.