18QHTF21-49.4267-PD

Overview

The 18QHTF21-49.4267-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4267 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package designed for surface mount applications.

Feature Summary

• Supports low-power operation with a dedicated standby mode
• Provides stable LVCMOS signal output for digital circuits
• Utilizes a leadless surface-mount package for automated assembly

Applications

• General-purpose clock generation for embedded systems
• Timing reference for data communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent soldering defects during assembly.

Selection Notes

Select this component when a precise 49.4267 MHz timing source is required with minimal power consumption. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the operating temperature range and stability specifications to ensure reliable performance under environmental stress conditions.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based timing solutions. The manufacturer has extensive experience in Taiwan's electronics industry. This series is engineered to provide high-frequency stability in small form factors suitable for modern consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 49.4267 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal characteristics. Cross-reference with other Mercury 18QHTF21 variants if frequency adjustments are permissible.