18QHTF21-7.875-OE

Overview

The 18QHTF21-7.875-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.875 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications, specifically requiring a 1.8V supply. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface mount assembly. This oscillator provides precise timing signals for digital circuits requiring stable clock sources.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable and disable control functionality
• Compact 4-SMD no lead surface mount package design

Applications

• Digital signal processing systems
• Communication equipment timing references
• Embedded microcontroller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the LVCMOS output swing is compatible with the receiving logic inputs. Check the operating temperature range specifications to ensure reliability under your environmental conditions. Validate the package dimensions for PCB footprint compatibility.

Selection Notes

Select this component when a low-voltage, surface-mount oscillator is required for 7.875 MHz applications. Consider the enable/disable feature if power management is critical. Compare size constraints against other SMD packages. Evaluate the LVCMOS output compatibility with downstream logic families. Assess thermal performance needs within the specified operating temperature range.

Part Context

Mercury Electronics Ind. Co. Ltd specializes in frequency control products including quartz crystals and oscillators. The 18QHTF21 series represents their standard crystal oscillator line. These components are designed for general-purpose timing applications. The manufacturer has extensive experience in Taiwan's quartz industry. This part fits within their portfolio of low-profile surface mount devices.

Replacement Considerations

Direct substitutes must match the 7.875 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent electrical parameters from other manufacturers. Ensure pinout compatibility for direct replacement. Check datasheet specifications for identical form factor and mounting requirements.