18QHTF21-78.800-PD

Overview

The 18QHTF21-78.800-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 78.8 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a standby mode for power down capabilities. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby functionality to reduce power consumption during idle periods
• Designed as a standard XO (Crystal Oscillator) for reliable clock generation

Applications

• Digital signal processing systems requiring stable clock sources
• Communication equipment utilizing LVCMOS interfaces
• Portable electronic devices benefiting from low-voltage operation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package dimensions fit within your PCB layout constraints. Cross-reference the part number suffix to ensure the correct packaging and reel specifications are obtained from authorized distributors.

Selection Notes

Select this component when a 78.8 MHz clock signal is required with LVCMOS compatibility. Consider the 1.8V operating voltage for low-power designs. Evaluate the need for standby functionality to manage energy efficiency. Compare the 4-SMD package size against available board space. Verify temperature range specifications if operating in extreme environments.

Part Context

This oscillator belongs to the Mercury Electronics 18QHTF series, which offers various frequencies in small SMD packages. These components are designed for general-purpose timing applications where size and power consumption are critical factors. The series supports multiple output voltages and includes power-down options for enhanced system flexibility.

Replacement Considerations

Direct substitutes must match the 78.8 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Check datasheets for equivalent parts from other manufacturers ensuring identical pinout and electrical characteristics.