18QHTF21-122.000-PD

Overview

The 18QHTF21-122.000-PD is a 122 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates on a 1.8V supply voltage and utilizes LVCMOS output logic. The component features a standard package with a 4-SMD, No Lead footprint. It includes a standby or power-down function for energy management. The device is designed for applications requiring precise clock signals within the specified frequency range.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode functionality to reduce power consumption
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation in electronic circuits
• Digital systems requiring 122 MHz timing references
• Portable devices utilizing 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 4-SMD no-lead package dimensions fit the designated PCB layout area. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a fixed 122 MHz clock source is required with low voltage operation. Consider the LVCMOS output level compatibility with downstream logic gates. Evaluate the need for the standby feature if power efficiency is a priority. Compare the physical size of the 4-SMD package against available board space constraints relative to other oscillator types.

Part Context

This part belongs to the 18QHTF series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies with consistent 1.8V operation and LVCMOS outputs. The 'PD' suffix indicates the inclusion of a power-down capability. This family targets applications needing small form factors and efficient power usage.

Replacement Considerations

Direct replacements must match the 122 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as rise/fall times. Consult official substitution lists from Mercury Electronics for validated alternatives.