18QHTF21-7.32781-PD

Overview

The 18QHTF21-7.32781-PD is a crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 7.32781 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 3.3V and features a standby or power-down mode for energy management. It is housed in a compact 3.2x2.0 mm surface-mount package with no lead construction, designed for integration into space-constrained electronic circuits requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with 3.3V supply requirement
• Includes standby functionality to reduce power consumption during idle states
• Utilizes standard LVCMOS output interface for digital compatibility

Applications

• General-purpose digital circuit timing
• Embedded system clock generation
• Communication module synchronization

Procurement Notes

Verify the specific operating voltage and load capacitance requirements against your circuit design before procurement. Ensure the 3.2x2.0 mm footprint matches your PCB layout constraints. Confirm that the LVCMOS output swing is compatible with your receiving logic inputs. Check for any specific handling instructions regarding the surface-mount package integrity during assembly processes.

Selection Notes

Select this component when a 7.32781 MHz reference signal is required within a 3.3V logic environment. Consider the physical dimensions of the 3.2x2.0 mm package to ensure adequate board space. Evaluate the power-down feature if battery life or thermal management is a critical design constraint. Compare alternative frequencies if the exact 7.32781 MHz rate does not align with system clock dividers.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor oscillators. The manufacturer has extensive experience in quartz crystal production. This specific model represents a standard XO variant optimized for modern portable and industrial electronics where size and power efficiency are prioritized over high-frequency performance.

Replacement Considerations

Direct substitutes may include other 7.32781 MHz LVCMOS oscillators in similar packages. Verify pinout compatibility and electrical specifications such as phase noise and stability before substitution. Cross-reference with distributor databases for equivalent parts from other manufacturers offering identical form factors and voltage ratings.