18QHTF21-73.63636-PD

Overview

The 18QHTF21-73.63636-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 73.63636 MHz with an LVCMOS output logic level. The device requires a supply voltage of 3.3V and features a Standby (Power Down) control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component complies with RoHS standards and has a Moisture Sensitivity Level (MSL) rating of 1, indicating unlimited handling life under controlled conditions.

Feature Summary

• Supports Standby mode for active power-down control
• Utilizes LVCMOS output interface for digital compatibility
• Complies with RoHS environmental directives

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing standard frequency references
• Embedded controllers needing low-power standby capabilities

Procurement Notes

Verify the specific ordering suffix to confirm the exact frequency tolerance and load capacitance requirements for your design. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions. Confirm that the 3.3V supply voltage aligns with your system's power rails before integration. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure joint reliability.

Selection Notes

Select this component when a fixed 73.63636 MHz reference is required with minimal form factor constraints. The LVCMOS output ensures direct interfacing with standard digital logic families without additional buffering. Consider the standby feature if power efficiency during idle states is a critical design parameter. Verify that the operating temperature range meets the environmental conditions of the intended application site.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series is characterized by small footprints and standardized output levels. Mercury Electronics is a specialized manufacturer of frequency control products, leveraging decades of experience in quartz crystal technology. This specific model represents a standard frequency option within their portfolio of timed components.

Replacement Considerations

Direct substitutes must match the 73.63636 MHz frequency, 3.3V supply, LVCMOS output, and 4-SMD no-lead package. Verify equivalent electrical parameters such as phase noise and jitter specifications. Ensure the replacement component supports the same standby control functionality and physical dimensions for board compatibility.