18QHTF21-64.4475-OE

Overview

The 18QHTF21-64.4475-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 64.4475 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes enable/disable functionality. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6mm.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable and disable control capability
• Compact surface-mount package design

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application's specifications before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD 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 64.4475 MHz clock source is required for low-voltage digital systems. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the small form factor for space-constrained designs. Verify that the enable pin functionality meets system power management needs. Ensure the operating temperature range covers the expected environmental conditions of the final assembly.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz crystals and oscillators, offering various packages and frequencies. This specific model represents a fixed-frequency option within their portfolio, designed for applications requiring stable timing signals without the complexity of programmable or tunable alternatives.

Replacement Considerations

Direct substitutes must match the 64.4475 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm footprint. Verify electrical parameters such as jitter and phase noise if critical. Cross-reference with other manufacturers' equivalent parts ensuring identical pinout and mechanical dimensions to maintain board compatibility.