18QHTF21-66.140-PD

Overview

The 18QHTF21-66.140-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.14 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby and power-down functionality
• Utilizes LVCMOS output logic interface
• Features a compact surface-mount package design

Applications

• Portable electronic devices requiring low power consumption
• Communication systems utilizing LVCMOS interfaces
• Embedded timing circuits in consumer electronics
• Battery-operated hardware applications

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 PCB footprint matches the 4-SMD no-lead package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a precise 66.14 MHz clock signal is required with minimal power usage. The LVCMOS output ensures compatibility with standard digital logic families. Consider the 1.8V operating voltage as a constraint for power supply design. The integrated power-down feature makes it suitable for applications requiring active standby modes to extend battery life.

Part Context

This oscillator belongs to the Mercury Electronics XO series designed for space-constrained applications. The model number indicates the 1.8V supply variant within the QHTF family. Similar parts in this series offer different frequencies while maintaining the same package and logic standards for consistent design integration across product lines.

Replacement Considerations

Direct replacements must match the 66.14 MHz frequency, 1.8V supply, and LVCMOS output. Verify pinout compatibility with the 4-SMD no-lead package. Alternative models from other manufacturers require electrical parameter validation to ensure functional equivalence in timing-sensitive circuits.