18QHTF21-63.750-PD

Overview

The 18QHTF21-63.750-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 63.75 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and includes a standby or power-down control feature to manage power consumption. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Utilizes LVCMOS output interface

Applications

• Digital signal processing systems
• Communication equipment requiring precise timing
• Embedded systems with space constraints

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply rail is stable and within tolerance limits to maintain frequency accuracy. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package specifications to avoid assembly issues.

Selection Notes

Select this component when a 63.75 MHz clock source is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with digital logic circuits. Consider the 1.8V supply requirement and ensure compatibility with existing voltage rails. The small form factor makes it appropriate for dense circuit board layouts.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized 4-SMD package. The series supports LVCMOS outputs and typically includes power-down features. Other variants in the series differ primarily in frequency and potentially voltage options, but share the same physical footprint and general functional characteristics.

Replacement Considerations

Direct substitutes include other 63.75 MHz XO components with identical 1.8V LVCMOS specifications and 4-SMD no-lead packages. Verify pinout compatibility and electrical parameters such as phase noise and jitter if critical. Cross-reference with Mercury Electronics' official replacement lists for guaranteed compatibility.