18QHTF21-15.5625-PD

Oscillators Overview

The 18QHTF21-15.5625-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 15.5625 MHz and utilizes LVCMOS output logic levels. The device is designed for surface mount applications, featuring a compact 4-SMD, No Lead package with dimensions of 0.079 inches in length and 0.063 inches in width. It functions within an operating temperature range of -40°C to 85°C and supports a standby power down mode. The maximum supply current is specified at 22mA, ensuring low power consumption suitable for portable and space-constrained electronic designs.

Oscillators Feature Summary

• Supports standby power down mode for energy efficiency
• Utilizes LVCMOS output interface for digital compatibility
• Designed for surface mount assembly on PCBs

Oscillators Applications

• Precision frequency generation in consumer electronics
• Clock signal sources for embedded systems
• Data communication equipment requiring stable timing

Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct voltage and tolerance specifications. Confirm that the package type matches the target PCB footprint requirements. Check for any regional compliance certifications required for the intended market. Ensure storage conditions align with moisture sensitivity level guidelines provided in the datasheet to maintain component reliability before soldering.

Oscillators Selection Notes

Select this component when a 15.5625 MHz clock source is required with LVCMOS outputs. Consider the -40°C to 85°C industrial temperature range for environmental suitability. Evaluate the 22mA maximum current draw against system power budgets. Compare the 4-SMD package dimensions against available board space constraints relative to alternative oscillator packages.

Oscillators Part Context

This part belongs to the QHTF series of crystal oscillators from Mercury Electronics, a pioneer in quartz crystal manufacturing since 1973. The series offers various frequencies and voltage options within a standardized small outline package. The 18QHTF21 variant specifically denotes the 1.8V supply version, distinguishing it from other voltage variants in the product line while maintaining consistent physical and electrical characteristics.

Oscillators Replacement Considerations

The 25QHTF21-15.5625-PD serves as a functional substitute within the same family, differing primarily in supply voltage requirements. Verify voltage compatibility before substitution. Other equivalents may include parts from different manufacturers offering similar frequency and package dimensions, but pinout and electrical parameters must be confirmed.