18QHTF21-12.660-PD

Overview

The 18QHTF21-12.660-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.66 MHz and utilizes LVCMOS output logic levels. The component is designed for low-power applications, functioning with a supply voltage of 1.8V. It features a standby mode for power-down functionality to conserve energy when not in use. The device is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Feature Summary

• LVCMOS output logic compatibility
• 1.8V supply voltage operation
• Standby power-down capability

Applications

• Battery-powered portable devices
• Low-power consumer electronics
• General digital timing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 4-SMD no-lead package dimensions align with your PCB footprint specifications. Confirm that the 1.8V operating voltage matches your system's power rail. Check for any RoHS compliance documentation if required by your manufacturing standards. Validate the standby current consumption limits for your power budget calculations.

Selection Notes

Select this model when a precise 12.66 MHz clock signal is required with minimal power consumption. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the 1.8V supply constraint for systems with limited voltage rails. The compact SMD form factor aids in space-constrained designs. Evaluate the standby feature necessity for battery-operated applications requiring extended runtime.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies while maintaining consistent electrical characteristics and packaging. These oscillators are designed for timing applications requiring stable clock signals. The manufacturer specializes in quartz crystals and timing components. The series supports both standard and spread-spectrum options depending on the suffix.

Replacement Considerations

Direct substitutes must match the 12.66 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and thermal performance. Cross-reference with other manufacturers offering similar XO specifications. Ensure equivalent frequency stability and phase noise characteristics if critical to the application.