18QHTF21-33.939-PD

Oscillators Overview

The 18QHTF21-33.939-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 33.939 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down control feature. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby and power-down functionality
• Provides LVCMOS output signal compatibility

Oscillators Applications

• General-purpose clock generation for digital circuits
• Embedded systems requiring precise timing references
• Portable electronic devices utilizing low-power components

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a 33.939 MHz reference is required for LVCMOS-compatible logic families. The choice is appropriate for designs prioritizing low power consumption due to the 1.8V operating voltage and standby capabilities. Consider the small 2.0x1.6mm form factor for space-constrained applications where surface-mount integration is necessary.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's quartz industry. This series typically offers standard oscillators with various frequencies and supply voltages, catering to diverse electronic timing needs across consumer and industrial sectors.

Oscillators Replacement Considerations

Compatible substitutes within the same series include 18QHTF21-33.939-OE, which features enable/disable control instead of power-down. Other frequency variants such as 18QHTF21-33.939-PD are functionally identical but may differ in packaging suffixes. Verify pinout and electrical parameters before substitution.