18QHTF21-39.730-PD

Oscillators Overview

The 18QHTF21-39.730-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 39.73 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a standby or power-down function for energy management. 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
• Includes standby and power-down functionality
• Provides LVCMOS output signal compatibility

Oscillators Applications

• Portable electronic devices requiring low power consumption
• Embedded systems utilizing LVCMOS interfaces
• Compact circuit boards with strict space constraints

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply rail is stable to maintain oscillator performance. Confirm that the PCB footprint matches the 4-SMD no-lead package specifications provided in the official datasheet to ensure proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 39.73 MHz clock source is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage constraint and the availability of a standby mode for power-sensitive applications. Evaluate the physical size limitations of the target board, as the 2.0x1.6mm package is suitable for high-density layouts where smaller form factors are necessary compared to larger oscillator packages.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series is characterized by small footprints and low voltage operation, targeting modern portable electronics. The 'PD' suffix typically indicates the inclusion of a power-down pin or feature, distinguishing it from standard continuous-operation variants within the same family.

Oscillators Replacement Considerations

Direct substitutes must match the 39.73 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if available in public documentation.