18QHTF21-64.1938-OE

Overview

The 18QHTF21-64.1938-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 64.1938 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features integrated enable and disable control functionality
• Utilizes a low-profile 4-SMD surface mount package

Applications

• General clock signal generation in electronic circuits
• Data communication systems requiring precise timing
• Embedded systems utilizing low-voltage logic interfaces

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. Cross-reference the manufacturer datasheet for absolute maximum ratings to prevent component damage during operation.

Selection Notes

Select this component when a stable 64.1938 MHz clock source is required within a low-power environment. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the small form factor if space is limited on the printed circuit board. Verify that the operating temperature range meets the environmental conditions of the intended application.

Part Context

This part belongs to the Mercury Electronics SMD Oscillator series, specifically the H21 or similar compact line indicated by the 2.0x1.6mm footprint. The company specializes in quartz crystals and oscillators, offering various frequency control products including TCXOs and VCXOs. This model represents a standard XO variant optimized for cost-effective mass production in consumer electronics.

Replacement Considerations

Direct substitutes must match the 64.1938 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Check equivalent parts from other manufacturers such as Epson or NDK that offer identical pinouts and electrical characteristics. Ensure thermal performance and aging rates are comparable for long-term reliability.