18QHTF21-66.66666-PD

Overview

The 18QHTF21-66.66666-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.66666 MHz with an LVCMOS output logic level. The device functions on a 1.8V supply voltage and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby mode capability
• Utilizes surface-mount packaging

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before ordering. Confirm that the 1.8V supply rail is stable within the operational limits defined in the official datasheet to ensure reliable oscillator performance.

Selection Notes

Select this component when a precise 66.66666 MHz clock source is required in space-constrained designs. The choice depends on the compatibility of the LVCMOS interface with the target logic family and the availability of a regulated 1.8V power supply in the system architecture.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers standard frequencies with low-profile packages suitable for modern electronics manufacturing processes requiring high-density board layouts.

Replacement Considerations

Direct substitutes must match the 66.66666 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm footprint. Verify pinout compatibility and electrical characteristics before swapping with other manufacturers' equivalents.