18QHTF21-70.5375-PD

Overview

The 18QHTF21-70.5375-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 70.5375 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, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Compact 4-SMD no lead surface mount package

Applications

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

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations required by your application environment.

Selection Notes

Select this component when a 70.5375 MHz clock source is required with low voltage operation. Consider the LVCMOS compatibility with downstream digital logic. Evaluate the need for power-down features to manage system power consumption. Verify that the physical dimensions of the 4-SMD package fit within the available board space constraints.

Part Context

This part belongs to the 18QHTF series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options. The 'PD' suffix likely indicates the inclusion of a power-down control feature. Mercury Electronics specializes in frequency control products, providing standardized components for electronic designs.

Replacement Considerations

Direct substitutes must match the 70.5375 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical specifications such as jitter and phase noise if critical. Consult manufacturer cross-reference lists for equivalent parts from other suppliers.