18QHTF21-74.550-PD

Overview

The 18QHTF21-74.550-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 74.55 MHz. It utilizes LVCMOS output logic and functions with a 1.8V supply voltage. The device supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly. This component serves as a precise clock source for digital circuits requiring stable timing signals within its specified operational parameters.

Feature Summary

• Provides stable clock generation via LVCMOS output interface
• Supports low-power operation through standby and power-down modes
• Designed for surface-mount integration using a 4-SMD no lead package

Applications

• Digital circuit timing reference
• Communication system clock sources
• Embedded processor clocking

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against the specific application design before procurement. Ensure that the 1.8V supply voltage aligns with the target system's power rails. Confirm that the 4-SMD no lead package dimensions fit the designated PCB footprint. Cross-reference the part number suffix to ensure compatibility with required manufacturing standards.

Selection Notes

Select this oscillator when a 74.55 MHz frequency is required with LVCMOS compatibility. Consider the 1.8V supply constraint and the need for standby functionality. Evaluate the thermal performance and size constraints associated with the 4-SMD no lead package. Compare against other frequencies in the 18QHTF21 series if alternative timing solutions are needed.

Part Context

This component belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies, including 6 MHz, 18.1059 MHz, and 50.2067 MHz variants. All models share similar packaging and electrical characteristics, differing primarily in their output frequency specifications.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts such as 18QHTF21-6.000-PD or 18QHTF21-18.1059-PD if frequency adjustments are permissible. Verify pinout and voltage compatibility when considering cross-series replacements.