18QHTF21-69.632-PD

Overview

The 18QHTF21-69.632-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 69.632 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm. The component complies with RoHS standards.

Feature Summary

• LVCMOS output interface
• Power-down standby capability
• RoHS compliant construction

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this model when a precise 69.632 MHz reference is required for low-voltage digital circuits. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the power-down feature if system efficiency is critical. Verify that the operating temperature range meets the environmental conditions of the intended application environment.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0mm x 1.6mm footprint. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants in the same family.

Replacement Considerations

Direct substitutes include other 69.632 MHz XO models with identical 1.8V LVCMOS outputs and 4-SMD packages. Cross-reference with Mercury's QHTF series for alternative frequencies or voltage options if system requirements change. Ensure pin compatibility and thermal characteristics match the original design constraints.