18QHTF21-51.660-PD

Overview

The 18QHTF21-51.660-PD is a 51.660 MHz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and features LVCMOS output logic. The device supports a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby mode for power reduction
• Utilizes LVCMOS output interface

Applications

• General electronic signal timing
• Consumer electronics clock sources
• Industrial control system synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to guarantee proper soldering and mechanical retention during assembly processes.

Selection Notes

Select this component when a precise 51.660 MHz reference is required in space-constrained designs. The choice is driven by the need for low-power consumption via the standby feature and compatibility with 1.8V logic families. Consider the small form factor for high-density board layouts where larger packages are not feasible.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount oscillators. The series typically offers various standard frequencies tailored for digital communication and processing applications. The 'PD' suffix indicates the inclusion of power-down functionality within the package.

Replacement Considerations

Direct substitutes must match the 51.660 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar ultra-small footprint oscillators if Mercury stock is unavailable.