18QHTF21-8.400-PD

Overview

The 18QHTF21-8.400-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 8.4 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down control function for standby mode management. It is housed in a compact 4-SMD, no-lead package designed for surface-mount applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down control capability for energy efficiency
• Utilizes a small footprint 4-SMD no-lead package design

Applications

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

Procurement Notes

Verify the specific suffix 'PD' confirms the power-down feature against the manufacturer's official datasheet. Ensure the 1.8V supply requirement aligns with the target circuit design. Confirm the 4-SMD no-lead package dimensions match the PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when an 8.4 MHz clock source with low-voltage operation is required. The power-down feature makes it suitable for battery-powered or energy-sensitive designs. Verify that the LVCMOS output swing matches the input requirements of the connected load devices.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. The series offers various frequencies and supply voltages. The '-PD' suffix specifically denotes the inclusion of a power-down pin or control mechanism, distinguishing it from standard enable/disable variants.

Replacement Considerations

Check for direct substitutes within the same series such as 18QHTF21-8.400-OE if power-down functionality is not strictly required. Verify electrical compatibility including voltage levels and output logic types before substituting.