18QHTF21-72.500-PD

Overview

The 18QHTF21-72.500-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 72.5 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm, suitable for space-constrained surface-mount applications.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes a power-down standby mode for energy efficiency
• Utilizes a small-footprint 4-SMD no-lead package design

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for digital circuits requiring 72.5 MHz stability
• Portable electronics utilizing low-voltage power supplies

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable and within the operational limits specified by the manufacturer. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to guarantee proper soldering and mechanical retention.

Selection Notes

Select this component when a precise 72.5 MHz clock source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint and ensure the system power architecture supports this level. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is critical for extending operational life.

Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and package sizes, with this specific variant focusing on the 72.5 MHz range in a minimal 2.0x1.6 mm form factor. It serves as a direct replacement for other industry-standard oscillators requiring similar electrical characteristics and physical dimensions.

Replacement Considerations

Direct substitutes may include other 72.5 MHz LVCMOS oscillators in 2.0x1.6 mm packages from different manufacturers, provided they match the 1.8V supply and pinout configuration. Verify thermal performance and frequency stability specifications to ensure equivalent functionality in the target application.