18QHTF21-10.78125-OE

Overview

The 18QHTF21-10.78125-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 10.78125 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 5.0mm length by 3.2mm width. This surface-mount oscillator is suitable for timing applications requiring precise clock signals in space-constrained electronic designs.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable control 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 specific suffix 'OE' against the manufacturer's official documentation to confirm the exact enable/disable configuration and packaging details. Ensure that the 1.8V supply voltage requirement aligns with the target system design. Cross-reference the part number with authorized distributors to confirm availability and authenticity, as suffix variations may indicate different electrical characteristics or packaging options not covered by general listings.

Selection Notes

Select this component when a 10.78125 MHz clock source is required with LVCMOS outputs. The 1.8V operating voltage makes it suitable for modern low-power digital systems. The enable/disable feature allows for dynamic power management. Consider the 5.0x3.2mm footprint for PCB layout constraints. Verify temperature range requirements against application needs, as standard oscillators typically operate within commercial temperature limits.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a supplier specializing in quartz crystals and oscillators. The series includes various frequencies such as 13.1313 MHz and 50.256 MHz, all sharing similar package and voltage characteristics. Mercury Electronics has been manufacturing frequency control products since 1973, positioning itself as a pioneer in the Taiwan crystal industry. The 18QHTF21 series represents their standard XO offerings.

Replacement Considerations

Direct substitutes include other 10.78125 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Check datasheets for pinout compatibility and electrical specifications. Suffixes like 'PD' may indicate different packaging but identical electrical performance. Verify frequency tolerance and stability requirements before substitution.