18QHTF21-49.560-PD

Overview

The 18QHTF21-49.560-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.56 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and features a power-down standby mode to reduce consumption during inactivity. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component serves as a precise timing source for digital circuits requiring low-profile surface-mount integration.

Feature Summary

• Generates a stable 49.56 MHz clock signal using LVCMOS output interface
• Operates on a single 1.8V power supply rail
• Includes a dedicated power-down (standby) control function
• Utilizes a small 4-SMD no-lead surface-mount package

Applications

• High-speed digital data transmission systems
• Embedded microcontroller clock sources
• Communication module timing references
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific load capacitance requirements and drive level specifications against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power architecture. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions precisely to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a compact surface-mount form factor. The integrated power-down feature makes it suitable for battery-operated applications where standby current reduction is critical. Compare performance against other LVCMOS oscillators in the same package size to ensure compatibility with existing board layouts and timing constraints.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series focuses on providing precise timing solutions in miniaturized packages suitable for modern high-density electronics. The 'PD' suffix indicates the inclusion of a power-down capability, distinguishing it from standard continuous-operation variants within the same family.

Replacement Considerations

Direct replacements must match the 49.56 MHz frequency, 1.8V supply voltage, LVCMOS output type, and 4-SMD 2.0x1.6mm package. Verify that substitute components also support the power-down functionality if required by the design.