18QHTF21-66.400-OE

Overview

The 18QHTF21-66.400-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.4 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features integrated enable and disable control functionality
• Designed for low voltage operation at 1.8V

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 2.0x1.6mm footprint matches the PCB layout constraints. Check for any specific environmental operating temperature range limitations defined in the official datasheet to guarantee reliability under intended operating conditions.

Selection Notes

Select this component when a precise 66.4 MHz clock source is required for LVCMOS-compatible digital circuits. The choice is driven by the need for a small 2.0x1.6mm form factor and low 1.8V power consumption. Consider the enable/disable feature if power management or clock gating is necessary within the design architecture.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized SMD package. The series provides consistent physical dimensions across different frequency options, simplifying board layout processes. Mercury Electronics specializes in quartz crystals and oscillators, leveraging decades of manufacturing experience in frequency control products.

Replacement Considerations

Direct substitutes include other 66.4 MHz LVCMOS oscillators in the same 2.0x1.6mm package with 1.8V operation. Verify pinout compatibility and electrical specifications such as phase noise and jitter before substitution.