18QHTF21-49.4667-PD

Overview

The 18QHTF21-49.4667-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 49.4667 MHz with an LVCMOS output logic level. The device functions on a 1.8V supply voltage and includes a power-down standby feature for energy efficiency. It utilizes a 4-SMD, no-lead surface mount package designed for compact electronic applications.

Feature Summary

• Provides stable LVCMOS clock signals at 49.4667 MHz
• Operates efficiently on a 1.8V power supply
• Includes power-down functionality to reduce consumption
• Utilizes a compact 4-SMD no-lead surface mount form factor

Applications

• Digital signal processing systems requiring precise timing
• Communication equipment utilizing standard clock frequencies
• Embedded systems with low-voltage power constraints

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power architecture. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly issues during manufacturing.

Selection Notes

Select this component when a 49.4667 MHz clock source is required in a space-constrained environment. The 1.8V operation makes it suitable for modern low-power digital circuits. Consider the LVCMOS output compatibility with your receiving logic gates. The power-down feature offers advantages in battery-operated or energy-sensitive designs.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically covers various frequencies within the standard XO category. These components are designed to replace through-hole crystals in high-density PCB layouts, offering improved reliability and automated assembly compatibility compared to older packaging styles.

Replacement Considerations

Direct replacements must match the 49.4667 MHz frequency, 1.8V supply, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as current consumption and output swing. Consult manufacturer cross-reference lists for verified equivalent parts.