18QHTF21-74.2129-PD

Overview

The 18QHTF21-74.2129-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 74.2129 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a 1.8V supply voltage. It features a standby mode for power-down functionality to reduce energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby capability for power-down operation
• Designed for 1.8V supply voltage operation

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator specifications. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint and reflow soldering profile capabilities to ensure reliable assembly and long-term performance.

Selection Notes

Select this model when a precise 74.2129 MHz reference is required with low power consumption. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the 1.8V operating voltage constraint and verify compatibility with downstream components. The standby feature offers an advantage for battery-powered or power-sensitive applications requiring periodic sleep modes.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized small outline package. The 'PD' suffix likely indicates specific packaging or handling characteristics consistent with the manufacturer's product line nomenclature for quartz-based frequency control products.

Replacement Considerations

Direct replacements must match the 74.2129 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical parameters such as phase noise and jitter if critical. Consult Mercury Electronics for official cross-reference data.