18QHTF21-6.63166-PD

Overview

The 18QHTF21-6.63166-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 6.63166 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a power-down function via a standby control input. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for applications requiring precise timing signals in low-voltage digital systems.

Feature Summary

• Integrates LVCMOS output interface for direct compatibility with digital logic circuits
• Supports active standby mode to reduce power consumption during idle periods
• Utilizes a leadless surface-mount package for automated assembly processes

Applications

• Battery-powered portable electronic devices
• Low-voltage digital signal processing systems
• Communication equipment requiring stable clock references

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your circuit design before ordering. 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. Request the official datasheet from Mercury Electronics for detailed electrical characteristics and soldering recommendations.

Selection Notes

Choose this model when a 6.63166 MHz reference is required in space-constrained designs. The 1.8V operation makes it suitable for modern low-power processors. Consider the standby feature if power management is critical. Compare against other frequencies in the QHTF21 series if different clock speeds are needed. Verify compatibility with LVCMOS inputs on the receiving end.

Part Context

This part belongs to the QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0x1.6mm footprint. The 'PD' suffix indicates the inclusion of a power-down control pin. These components are widely used in consumer electronics and industrial controls where size and power efficiency are prioritized over high-frequency performance.

Replacement Considerations

Direct substitutes include other 6.63166 MHz LVCMOS oscillators in the same 4-SMD package. Check for identical supply voltage and output logic compatibility. Verify thermal specifications match the application environment. Cross-reference with Mercury Electronics' updated product lists for potential obsolescence or newer revisions.