18QHTF21-75.656-PD

Overview

The 18QHTF21-75.656-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 75.656 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.

Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby power-down functionality to reduce consumption
• Utilizes LVCMOS output logic for digital interface compatibility

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. Ensure that the 1.8V supply rail is stable and within the specified operating range to maintain oscillator performance. Confirm that the PCB layout supports the 4-SMD no-lead package dimensions for proper soldering and thermal management during assembly processes.

Selection Notes

Select this component when a precise 75.656 MHz clock source is required with low power consumption capabilities. The LVCMOS output ensures compatibility with standard digital logic families. Consider the 1.8V operating voltage constraint and ensure the application environment supports the specified temperature range for reliable long-term operation without exceeding electrical limits.

Part Context

This oscillator belongs to the 18QHTF series from Mercury Electronics, designed for compact electronic systems. The manufacturer specializes in quartz crystal products with decades of industry experience. This specific model represents a standard XO variant optimized for modern low-voltage digital applications requiring stable frequency generation in small form factors.

Replacement Considerations

Direct substitutes must match the 75.656 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD package. Verify pinout compatibility and thermal characteristics before swapping. Cross-reference with other Mercury Electronics models or equivalent industry standards ensuring identical electrical parameters and mechanical footprint constraints are met.