18QHTF21-57.5491-PD

Overview

The 18QHTF21-57.5491-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 57.5491 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount applications requiring precise clock signals.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality to reduce power consumption
• Utilizes a 4-SMD no-lead surface-mount package design

Applications

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

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a stable 57.5491 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V supply requirement and the need for power-down capabilities. Evaluate the physical size of the 4-SMD package against available board space. Compare performance metrics such as phase noise and stability if available in the manufacturer's documentation.

Part Context

This part belongs to the Mercury Electronics XO series, designed for general-purpose clock generation. The manufacturer specializes in quartz crystals and oscillators, offering various frequency control solutions. This specific model represents a standard frequency option within their portfolio of surface-mount oscillators.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin replacements. Verify electrical compatibility including voltage, current, and frequency accuracy. Ensure the replacement part supports the same LVCMOS logic level and package dimensions.