18QHTF21-67.400-PD

Overview

The 18QHTF21-67.400-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 67.4 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby function for power-down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• LVCMOS output logic interface
• Integrated standby mode for power management
• Compact surface-mount package design

Applications

• General clock signal generation
• Embedded system timing references
• Digital circuit synchronization

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 no-lead package footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 67.4 MHz clock source is required for low-voltage digital applications. The choice depends on the necessity for an LVCMOS interface compatible with standard logic families. Consider the physical size constraints of the 2.0x1.6mm package relative to available board space and the need for power-down functionality via the standby pin.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's quartz industry. This series typically offers various frequencies within a small form factor, catering to modern electronics requiring miniaturized timing solutions.

Replacement Considerations

Direct substitutes include other 67.4 MHz LVCMOS oscillators in similar 4-SMD packages. Verify compatibility regarding operating voltage, current consumption, and pin configuration. Alternative models from different manufacturers must match the 1.8V supply requirement and provide equivalent electrical performance characteristics.