18QHTF21-13.5575-PD

Overview

The 18QHTF21-13.5575-PD is a 13.5575 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates on a 1.8V supply voltage. The device 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. This component is designed for applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• LVCMOS output interface
• 1.8V operating voltage
• Standby control capability
• Compact 4-SMD no lead package

Applications

• Portable consumer electronics
• Battery-powered devices
• Communication modules
• Embedded system clocks

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the PCB footprint matches the 4-SMD no lead package dimensions to avoid assembly issues. Check for any specific handling instructions regarding electrostatic discharge protection during installation.

Selection Notes

Select this model when a low-voltage 1.8V operation is required alongside a small form factor. The LVCMOS output is suitable for direct interfacing with standard digital logic inputs. Consider the standby feature if power conservation is critical. Verify that the 13.5575 MHz frequency aligns with your system's timing requirements. Compare package size constraints against alternative oscillators if space is limited.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options within similar compact packages. The 'PD' suffix likely indicates a specific packaging or testing variant, though official documentation should be consulted for precise definition. It complements other models like the 18QHTF21-51.200-PD which share similar physical characteristics but differ in frequency.

Replacement Considerations

Direct substitutes must match the 13.5575 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical parameters such as phase noise and jitter if they are critical to your application. Ensure the replacement part supports the same standby control functionality. Cross-reference with Mercury Electronics' current product list for updated equivalents.