18QHTF21-57.800-OE

Overview

The 18QHTF21-57.800-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 57.8 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications. This component serves as a precise clock source for digital circuits requiring stable timing signals.

Feature Summary

• LVCMOS output logic compatibility
• Integrated enable/disable control functionality
• Compact 4-SMD no lead surface mount package

Applications

• Digital circuit clock generation
• Embedded system timing references
• Consumer electronics signal processing

Procurement Notes

Verify the exact frequency specification of 57.8 MHz against design requirements. Confirm the 1.8V supply voltage compatibility with the target system. Ensure the LVCMOS output logic aligns with connected interface standards. Check that the 4-SMD no lead package footprint matches the PCB layout constraints to ensure proper assembly and electrical connection.

Selection Notes

Select this model when a 57.8 MHz clock signal is required with low voltage operation. Consider the enable/disable feature if power efficiency during idle states is critical. The small form factor suits space-constrained designs. Verify that the LVCMOS output swing meets the input thresholds of downstream components to guarantee reliable signal transmission across the operating temperature range.

Part Context

This oscillator belongs to the Mercury Electronics 18QHTF21 series, which offers various frequencies within a standardized SMD package. The series provides consistent performance characteristics across different frequency options, allowing designers to maintain uniform board layouts while adjusting timing parameters. The manufacturer specializes in quartz-based frequency control products, ensuring reliability in timing applications.

Replacement Considerations

Direct substitutes include other 57.8 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Ensure replacement parts match the 1.8V supply requirement and enable/disable pin configuration. Verify that the new component maintains equivalent electrical specifications and physical dimensions to fit existing footprints without redesign.

FAQ

Does the 18QHTF21-57.800-OE support spread spectrum modulation?

No, this specific model is a standard XO (Crystal Oscillator) and does not support spread spectrum features.

What is the purpose of the enable/disable function?

The enable/disable function allows the system to turn the oscillator on or off to conserve power when the clock signal is not actively needed.