18QHTF21-122.70444-PD

Overview

The 18QHTF21-122.70444-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 122.70444 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. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality for energy management
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing LVCMOS interfaces
• Portable electronic devices necessitating low-voltage operation

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 power rails. Ensure the 2.0x1.6 mm footprint matches the PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under intended environmental conditions.

Selection Notes

Select this component when a 122.70444 MHz clock source is required with LVCMOS outputs. The 1.8V operating voltage makes it suitable for modern low-power digital circuits. The small 4-SMD package is ideal for space-constrained designs. Consider the power-down feature if energy efficiency during idle states is a priority for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics Ind. Co. Ltd, which offers various frequencies within a standardized 2.0x1.6 mm SMD package. The series typically supports LVCMOS outputs and 1.8V operation. The '-PD' suffix indicates the inclusion of power-down capabilities. This family is designed for applications requiring reliable frequency control in compact form factors.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinout and package dimensions but different frequencies, such as 18QHTF21-51.200-PD or 18QHTF21-84.644-PD, provided the frequency difference is acceptable for the system design.