18QHTF21-66.486-PD

Overview

The 18QHTF21-66.486-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 66.486 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby (power down) function to reduce power consumption when inactive. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Features a standby mode to enable power-down functionality
• Utilizes a leadless SMD package for space-constrained board layouts

Applications

• General clock generation for embedded systems
• Timing reference for communication interfaces
• Power management circuits requiring low-power standby states

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD no-lead footprint matches your PCB silkscreen and solder mask definitions to prevent assembly errors during production.

Selection Notes

Select this component when a fixed 66.486 MHz frequency is required with low-voltage operation. Consider the LVCMOS output swing limits for your downstream logic levels. Evaluate the thermal performance of the leadless package if high ambient temperatures are expected in the final application environment.

Part Context

This part belongs to the Mercury Electronics XO series, which focuses on standard oscillators with integrated standby capabilities. The 'PD' suffix typically indicates the power-down feature availability. This series supports various frequencies within the MHz range, providing a standardized solution for timing needs across different electronic product categories.

Replacement Considerations

Direct substitutes must match the 66.486 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical specifications such as phase noise and jitter before swapping manufacturers to ensure signal integrity remains within acceptable limits.