18QHTF21-27.750-PD

Oscillators Overview

The 18QHTF21-27.750-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 27.75 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

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

Oscillators Applications

• Digital clock signal generation
• Data communication interface timing
• Microcontroller system clocks

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable within the datasheet specifications to ensure reliable oscillation. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions precisely to avoid soldering defects during assembly.

Oscillators Selection Notes

Select this model when a 27.75 MHz reference is required for LVCMOS-compatible digital circuits. The choice depends on the availability of a 1.8V power supply and the need for a low-profile surface-mount package. Consider the power-down feature if system energy efficiency is a priority compared to continuous-operation alternatives.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, characterized by small form factors and low voltage operation. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from standard continuous-output variants within the same frequency and package family.

Oscillators Replacement Considerations

Direct replacements must match the 27.75 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility for the power-down function. Cross-reference with other manufacturers offering identical electrical parameters and mechanical dimensions to ensure seamless integration.