18QHTF21-49.440-OE

Overview

The 18QHTF21-49.440-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.44 MHz and utilizes an LVCMOS output interface. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package, specifically designed for surface-mount applications. This component provides precise timing signals suitable for digital circuits requiring stable clock sources within the specified operating temperature range.

Feature Summary

• Generates a stable 49.44 MHz clock signal using LVCMOS logic levels
• Features integrated enable and disable functionality for power management
• Operates on a single 1.8V power supply rail
• Utilizes a lead-free surface-mount package for automated assembly

Applications

• Digital system clock generation
• Data communication interfaces
• Microcontroller timing sources
• Embedded system synchronization

Procurement Notes

Verify the specific suffix 'OE' against the manufacturer's current datasheet to confirm exact electrical tolerances and pinout configurations. Ensure the ordering part number matches the required frequency and package dimensions. Cross-reference the RoHS compliance status and lead-free specifications with the latest official documentation before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS output interface. Consider the 4-SMD no-lead package size for PCB space constraints. Verify that the 49.44 MHz frequency aligns with the target circuit's clock requirements. Ensure the enable/disable feature meets the system's power management strategy.

Part Context

This oscillator belongs to the Mercury Electronics family of surface-mount timing devices. The brand specializes in quartz crystals and oscillators for various electronic applications. The 18QHT series typically denotes small-form-factor oscillators designed for modern consumer and industrial electronics requiring reliable frequency control.

Replacement Considerations

Direct substitutes must match the 49.44 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check Mercury Electronics' internal cross-reference lists for equivalent part numbers. Verify compatibility with other manufacturers only if pinout, voltage, and form factor are identical.