18QHTF21-120.000-PD

Overview

The 18QHTF21-120.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 120 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down control function for energy management. It is housed in a compact 4-SMD, no lead package suitable for surface-mount assembly.

Feature Summary

• Standard XO configuration with LVCMOS output
• Integrated standby and power-down functionality
• Compact 4-SMD no lead package design

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under your environmental conditions.

Selection Notes

Select this component when a precise 120 MHz reference is required for LVCMOS-compatible digital circuits. Consider the 1.8V operation if low-power consumption is a priority. The integrated power-down feature makes it suitable for battery-operated devices requiring active standby modes. Evaluate the physical dimensions of the 4-SMD package against available board space.

Part Context

This part belongs to the SuperTan DLA series from Mercury Electronics, known for quartz crystal manufacturing. The 'PD' suffix typically indicates the inclusion of a power-down pin. Mercury Electronics has a long history in Taiwan's quartz industry, providing frequency control solutions since 1973.

Replacement Considerations

Direct substitutes must match the 120 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and electrical specifications before swapping. No other specific substitute part numbers are publicly confirmed for this exact model.