18QHTF21-7.9365079-PD

Overview

The 18QHTF21-7.9365079-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.9365079 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode for power reduction
• Surface-mount 4-pin no-lead package design

Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific 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 and long-term performance stability.

Selection Notes

Select this component when a low-voltage LVCMOS oscillator is required for space-constrained designs. The 1.8V operation makes it suitable for modern low-power digital systems. Consider the 4-SMD package for automated surface-mount assembly. Evaluate the need for a standby feature if power efficiency during idle periods is a critical design parameter compared to continuous operation oscillators.

Part Context

This part belongs to the 18QHTF21 series of standard XO oscillators from Mercury Electronics. The series offers various frequencies and voltages. The 'PD' suffix typically indicates the inclusion of a power-down or standby control pin/function. This model specifically targets the 7.9365079 MHz frequency point within the 1.8V LVCMOS segment.

Replacement Considerations

Cross-reference tools may suggest parametrically similar parts. Verify that any substitute matches the 7.9365079 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Ensure the replacement also supports the standby functionality if required by the original design.