18QHTF21-9.909116-PD

Overview

The 18QHTF21-9.909116-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 9.909116 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise timing signals in low-voltage digital systems.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby and power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing circuits
• Communication equipment timing references
• Embedded system clock generation

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 2.0x1.6mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliability during assembly.

Selection Notes

Select this component when a precise 9.909116 MHz clock source is required for LVCMOS-compatible digital logic. The choice is driven by the need for low-voltage operation at 1.8V and the inclusion of a power-down feature for energy efficiency. The small form factor makes it ideal for space-constrained designs. Consider the operating temperature range and stability requirements to ensure performance under environmental conditions.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage levels, all sharing a common compact SMD package. Mercury Electronics specializes in frequency control products, including crystals and oscillators, providing reliable timing solutions for electronic applications. The 'PD' suffix indicates the presence of a power-down capability.

Replacement Considerations

Compatible alternatives include other 18QHTF21 series variants with different frequencies, such as 18QHTF21-51.200-PD or 18QHTF21-8.000-PD, if frequency adjustment is permissible. Ensure any substitute maintains the same LVCMOS output, 1.8V supply, and 4-SMD package type. Verify that the replacement part supports the standby function if power management is critical.