18QHTF21-4.31818-PD

Oscillators Overview

The 18QHTF21-4.31818-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 4.31818 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• Supports low-power standby mode via dedicated control pin
• Provides stable LVCMOS clock signals for digital circuits
• Compact surface-mount footprint for space-constrained designs

Oscillators Applications

• General-purpose clock generation for microcontrollers
• Timing reference for communication interfaces
• Low-power embedded system synchronization

Oscillators Procurement Notes

Verify the exact operating temperature range and load capacitance requirements against your specific application needs before procurement. Confirm that the 1.8V supply voltage aligns with your system's power architecture. Ensure the 4-SMD package dimensions fit within your PCB layout constraints. Cross-reference the datasheet for precise electrical characteristics to guarantee compatibility with downstream components.

Oscillators Selection Notes

Select this component when a precise 4.31818 MHz timing source is required for low-voltage digital systems. Consider the LVCMOS output swing compatibility with your receiving logic gates. Evaluate the power consumption benefits of the standby feature if battery life or thermal management is critical. Verify that the package size meets your assembly capabilities and board space limitations.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series offers various frequency options within a consistent 4-SMD no-lead package form factor. These oscillators are designed for applications requiring reliable frequency generation with minimal power consumption, serving as fundamental timing elements in modern electronic devices.

Oscillators Replacement Considerations

Direct substitutes include other 4.31818 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Check for identical pinout configurations and compatible output drive strengths. Ensure replacement parts meet the same frequency stability and phase noise specifications required by the original design.