18QHTF21-63.888-PD

Overview

The 18QHTF21-63.888-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a frequency of 63.888 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

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

Applications

• General electronic circuits requiring precise timing
• Embedded systems utilizing low-voltage logic
• Portable devices requiring small form factor oscillators

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout requirements to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a 63.888 MHz clock signal is required within a 1.8V logic environment. The choice is appropriate for designs prioritizing low power consumption due to the standby capability. Engineers should consider the physical constraints of the 2.0x1.6mm package when determining placement density on the circuit board relative to other surface-mount components.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronic Ind. Co. Ltd, which specializes in quartz crystal frequency control products. The manufacturer has a long history in Taiwan's quartz industry. This specific part represents a standard XO variant within their portfolio, distinguished by its specific frequency and low-voltage operation characteristics compared to other series members.

Replacement Considerations

Direct substitutes must match the 63.888 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pin compatibility and thermal specifications before swapping. Generic replacements may lack the specific standby functionality or exact dimensional tolerances required for the original design.