18QHTF21-75.290-PD

Overview

The 18QHTF21-75.290-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 75.29 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 to manage energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Supports standby mode for power reduction
• Utilizes a leadless SMD package for space-constrained designs

Applications

• Digital signal processing circuits
• Communication equipment timing references
• Embedded system clock generation

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 power rails. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a stable 75.29 MHz reference is required for low-voltage digital systems. The LVCMOS output ensures direct interfacing with compatible logic families without additional level shifting. Consider the power-down feature if energy efficiency is critical for battery-operated or portable devices within the application environment.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor oscillators. The series typically offers various frequencies and voltage options within a standardized 2.0x1.6mm footprint. This specific model provides a mid-range frequency option optimized for general-purpose timing applications in consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 75.29 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify pinout compatibility and electrical characteristics such as phase noise and jitter against the original datasheet to ensure functional equivalence in the existing circuit layout.