18QHTF21-72.99166-PD

Overview

The 18QHTF21-72.99166-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 72.99166 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, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby and power-down functionality
• Surface-mount 4-SMD no lead package design

Applications

• General purpose timing clock generation
• Digital signal processing systems
• Embedded controller circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target platform's power rails. Ensure the 4-SMD no lead footprint matches the PCB layout to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a stable 72.99166 MHz reference is required for LVCMOS-compatible digital circuits. The choice is driven by the need for low-power operation via the standby feature and the space constraints addressed by the small SMD package. Evaluate thermal performance and frequency stability needs relative to the operating environment.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of standard XO oscillators. The series offers various frequencies within a consistent 4-SMD form factor. The suffix -PD indicates the inclusion of power-down control capabilities, distinguishing it from basic continuous-operation variants within the same physical package family.

Replacement Considerations

Direct substitutes must match the 72.99166 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if available in competitor datasheets.