18QHTF21-49.4167-OE

Overview

The 18QHTF21-49.4167-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4167 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a 1.8V supply voltage. It features enable/disable control functionality to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Enable/Disable control function for power management
• Low-voltage operation at 1.8V supply
• Compact 4-SMD No Lead surface-mount package

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Data communication interfaces requiring precise clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the enable/disable pin configuration matches your control logic. Check the operating temperature range specifications to guarantee reliability under your intended environmental conditions. Validate the package dimensions against your PCB footprint.

Selection Notes

Select this component when a stable 49.4167 MHz clock source is required for 1.8V logic families. Consider the enable/disable feature if power efficiency during idle states is critical. Compare the size of the 4-SMD package against available board space constraints. Evaluate the need for LVCMOS outputs versus other logic types like HCSL or CMOS depending on noise immunity requirements.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and supply voltages. The suffix 'OE' typically denotes the Enable/Disable control option. This series is designed for consumer electronics and portable devices where small form factors and low power are prioritized over ultra-high stability metrics found in TCXO variants.

Replacement Considerations

Direct replacements must match the 49.4167 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility for the enable/disable function. Cross-reference with other manufacturers offering similar low-profile oscillators if Mercury stock is unavailable.