18QHTF21-27.7777-PD

Oscillators Overview

The 18QHTF21-27.7777-PD is a 27.7777 MHz crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package. This component is designed for applications requiring precise clock signals with low power consumption.

Oscillators Feature Summary

• LVCMOS output logic for standard digital interface compatibility
• Integrated standby mode enabling power down capability
• Compact 4-SMD no lead surface mount package design

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded controller clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD package dimensions fit within your PCB layout constraints. Cross-reference the part number suffix to ensure the correct packaging and tape/reel specifications are obtained from authorized distributors.

Oscillators Selection Notes

Select this oscillator when a 27.7777 MHz clock source is required with LVCMOS compatibility. Consider the 1.8V operating voltage for low-power designs. Evaluate the 4-SMD footprint for space-constrained layouts. Compare performance metrics such as phase noise and stability if available in official datasheets against alternative frequencies or packages offered by Mercury Electronics.

Oscillators Part Context

This model belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic Ind. Co. Ltd. The series typically offers various frequencies with LVCMOS outputs and 1.8V operation. The 'PD' suffix likely indicates specific packaging or testing parameters defined by the manufacturer. Mercury Electronics specializes in quartz crystals and frequency control products.

Oscillators Replacement Considerations

Direct replacements must match the 27.7777 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and electrical characteristics. Consult Mercury Electronics documentation for equivalent part numbers within the same series that may offer updated revisions or alternative packaging options.