18QHTF21-12.345678-PD

Overview

The 18QHTF21-12.345678-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 12.345678 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

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

Applications

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

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 4-SMD no-lead footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a fixed frequency of 12.345678 MHz is required with LVCMOS outputs. Consider the 1.8V operating voltage constraint and the need for a power-down feature. Evaluate the 4-SMD no-lead package dimensions against available board space. Compare performance against other Mercury Electronics oscillators if different frequencies or voltages are needed.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics Ind. Co., Ltd, which specializes in quartz crystal frequency control products. The series typically offers various standard frequencies with LVCMOS outputs and low-voltage operation. Mercury Electronics has a long history in manufacturing quartz crystals, positioning this component within their established portfolio of precision timing solutions.

Replacement Considerations

Direct substitutes include other variants within the 18QHTF21 series such as 18QHTF21-12.000-PD or 18QHTF21-12.500-PD, provided the frequency difference is acceptable. Cross-reference with similar 4-SMD LVCMOS oscillators from other manufacturers only if pin-out and voltage compatibility are verified.