18QHTF21-7.776-OE

Overview

The 18QHTF21-7.776-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 7.776 MHz and utilizes LVCMOS output logic levels. The device requires a 1.8V supply voltage and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface
• Enable/disable functionality
• Compact 4-SMD no lead package

Applications

• Timing and clock generation
• Digital signal processing systems
• Communication equipment

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD no lead package footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during operation.

Selection Notes

Select this component when a precise 7.776 MHz clock source is required with low-voltage compatibility. The LVCMOS output ensures direct interfacing with standard digital logic families without additional level shifting. Consider the enable pin feature if dynamic power saving or clock gating is necessary for the application's efficiency requirements.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic. The series typically offers various frequencies within a small form factor. The suffix OE indicates specific ordering or configuration details defined by the manufacturer. These components are designed for general-purpose timing applications requiring stable frequency generation.

Replacement Considerations

Direct substitutes must match the 7.776 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify electrical parameters such as phase noise and jitter specifications to ensure functional equivalence. Check pinout compatibility to avoid redesigning the PCB layout when swapping suppliers.