18QHTF21-54.78125-PD

Oscillators Overview

The 18QHTF21-54.78125-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 54.78125 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is engineered for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports standby mode for power management
• Compact 4-SMD no-lead surface mount package
• LVCMOS output logic compatibility

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded control circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Oscillators Selection Notes

Select this model when a stable 54.78125 MHz clock source is required for LVCMOS-compatible digital logic. The low-profile 2.0x1.6mm package is suitable for space-constrained designs. Consider the power-down feature if battery life or thermal management is a priority. Ensure the operating temperature range meets your environmental specifications.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has over 50 years of experience in Taiwan's crystal industry. The 'PD' suffix indicates the inclusion of a power-down capability within the oscillator module.

Oscillators Replacement Considerations

Direct substitutes must match the 54.78125 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics before swapping.