18QHTF21-75.49472-PD

Overview

The 18QHTF21-75.49472-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 75.49472 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise clock source for digital circuits requiring low-power operation and small form factors.

Feature Summary

• Supports Standby mode for active power-down control
• Utilizes LVCMOS output logic for digital interface compatibility
• Features a compact 4-SMD No Lead surface-mount package

Applications

• Clock generation for embedded systems
• Timing reference for communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly errors during manufacturing.

Selection Notes

Select this component when a 75.49472 MHz clock signal is required with strict size constraints. The 1.8V operating voltage makes it suitable for modern low-voltage logic families. Consider the Standby feature if power conservation is critical during idle periods compared to continuously running oscillators.

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 crystal industry. The series typically offers various frequencies within a standardized small outline package format for widespread industrial adoption.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with different frequencies such as 18QHTF21-17.69472-PD or 18QHTF21-96.768-PD if frequency adjustment is permissible. Cross-brand replacements must match the 4-SMD No Lead package, 1.8V supply, and LVCMOS output characteristics.