18QHTF21-108.791-PD

Overview

The 18QHTF21-108.791-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 108.791 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is RoHS compliant and suitable for applications requiring precise timing signals in low-voltage digital systems.

Feature Summary

• Supports standby mode via power-down control
• Compact surface-mount form factor
• LVCMOS output compatibility

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliability during assembly processes.

Selection Notes

Select this component when a 108.791 MHz clock source is required with low voltage operation. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the small 2.0x1.6 mm package size for space-constrained designs. The power-down feature offers flexibility for managing power consumption in portable or battery-operated devices where standby current reduction is critical for extended operational life.

Part Context

This oscillator belongs to the QHTF series from Mercury Electronics, which specializes in quartz frequency control products. The company has decades of experience in manufacturing crystal components. The 'PD' suffix indicates the inclusion of a power-down pin, allowing for active control of the oscillator state. This series is designed to meet modern electronic demands for miniaturization and efficient power usage in high-frequency applications.

Replacement Considerations

Direct substitutes must match the 108.791 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and stability. Cross-reference with other manufacturers offering similar surface-mount oscillators with identical pinout and functional specifications to ensure seamless integration without redesigning the host circuitry.