18QHTF21-75.5244-PD

Overview

The 18QHTF21-75.5244-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 75.5244 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and supporting a standby or power-down mode to reduce energy consumption during idle periods. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface for digital compatibility
• Supports standby and power-down modes
• Compact 4-SMD no lead package design

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application's datasheet specifications. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD no lead footprint matches the PCB layout guidelines provided in the official component documentation before finalizing procurement.

Selection Notes

Select this component when a precise 75.5244 MHz reference is required with low power consumption constraints. The LVCMOS output ensures direct interfacing with standard digital logic without additional level shifting. Consider the 1.8V operating voltage and standby capabilities for battery-powered or energy-efficient designs requiring active clock management.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 4-SMD no lead form factor. The series provides consistent electrical characteristics across different frequency options, allowing designers to maintain uniform board layouts while adjusting timing parameters through the ordering suffix.

Replacement Considerations

Direct replacements must match the 75.5244 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other Mercury Electronics parts in the same series or equivalent industry-standard oscillators meeting identical electrical and mechanical specifications.