18QHTF21-100.0025-PD

Overview

The 18QHTF21-100.0025-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 100.0025 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a Standby (Power Down) function for energy 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 timing signals in space-constrained electronic systems.

Feature Summary

• Integrated standby capability for power reduction
• Compact surface-mount form factor suitable for dense PCB layouts
• LVCMOS output interface for direct digital logic compatibility

Applications

• High-speed data communication interfaces
• Digital signal processing circuits
• Network equipment timing sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational needs. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues during manufacturing.

Selection Notes

Select this component when a 100.0025 MHz clock signal is required with low voltage operation. Consider the 1.8V supply constraint and the need for a standby feature. Evaluate the physical size constraints of the application against the 2.0x1.6mm package. Compare performance metrics such as phase noise and stability if available in official documentation.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized small outline package. The series supports LVCMOS outputs and includes power-down functionality. It is distinct from other series like the 25QHTF21, which typically operate at different voltages or frequencies.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinout and package but different frequencies, provided the system allows frequency adjustment. Cross-reference with Mercury Electronics' official replacement guide for equivalent parts with matching electrical characteristics.