18QHTF21-28.935-PD

Oscillators Overview

The 18QHTF21-28.935-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 28.935 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 2.5V and features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 7.0 x 5.5 mm.

Oscillators Feature Summary

• Standard XO configuration with LVCMOS output interface
• Integrated Standby (Power Down) functionality
• Compact 4-SMD No Lead surface-mount package

Oscillators Applications

• General electronic systems requiring precise timing
• Embedded devices utilizing LVCMOS interfaces
• Applications necessitating low-power standby modes

Oscillators Procurement Notes

Verify the specific operating voltage and load requirements against the target circuit design before procurement. Confirm that the 2.5V supply specification aligns with the system's power rails. Ensure the 4-SMD No Lead footprint matches the PCB layout constraints. Cross-reference the part number suffix to confirm the exact frequency tolerance and temperature range specifications required for the application environment.

Oscillators Selection Notes

Select this component when a 28.935 MHz clock signal is required with LVCMOS compatibility. Consider the 2.5V operating voltage constraint during power budget analysis. The integrated standby feature makes it suitable for battery-operated or power-sensitive designs. Verify that the physical dimensions fit within the available board space compared to alternative packages.

Oscillators Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized small outline package. The series provides options for different supply voltages and output types. The PD suffix typically indicates the inclusion of a power-down control pin, distinguishing it from continuously running variants within the same family.

Oscillators Replacement Considerations

Direct substitutes include other 28.935 MHz LVCMOS oscillators in 4-SMD No Lead packages with 2.5V operation. Verify pinout compatibility and electrical parameters such as jitter and stability before substitution.