18QHTF21-6.780-OE

Overview

The 18QHTF21-6.780-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 6.78 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes an enable/disable control function to manage power consumption. 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 for digital signal compatibility
• Integrated enable/disable pin for power management
• Compact 4-SMD no-lead surface mount package

Applications

• General clock generation for embedded systems
• Timing reference for microcontroller units
• Consumer electronics requiring low-power oscillation

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 footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 6.78 MHz timing source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage constraint and the availability of the enable feature for power-sensitive designs. Evaluate the physical dimensions of the 4-SMD package against available board space constraints to ensure compatibility with automated pick-and-place processes.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series typically offers various frequency options within a standardized small outline package format. These components are commonly used in applications requiring stable clock signals with minimal power consumption and straightforward integration into digital logic circuits.

Replacement Considerations

Direct substitutes must match the 6.78 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no-lead package. Verify that any alternative component supports the same enable/disable functionality and meets equivalent electrical performance standards for reliable system operation.