18QHTF21-49.350-OE

Overview

The 18QHTF21-49.350-OE is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.35 MHz and requires a supply voltage of 1.8V. The device features enable and disable control functionality for power management. It is housed in a compact 4-SMD, No Lead package with dimensions suitable for surface-mount applications. The unit supports industrial temperature ranges and provides a stable clock signal for digital circuits.

Feature Summary

• Generates a precise 49.35 MHz clock signal using LVCMOS output logic
• Includes hardware enable and disable pins for active power control
• Utilizes a leadless surface-mount package for automated assembly

Applications

• High-speed digital data processing systems
• Communication interface circuitry requiring stable timing
• Embedded microcontroller clock sources

Procurement Notes

Verify the specific operating temperature range 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 low-voltage 1.8V operation is required alongside precise frequency stability. The enable/disable feature makes it suitable for battery-powered or power-sensitive designs. Compare performance against other Mercury oscillators if different frequencies or package sizes are needed for space constraints.

Part Context

This part belongs to the Mercury Electronics family of quartz crystal oscillators. The manufacturer specializes in frequency control products including TCXOs and VCTCXOs. The 18QHT series represents their standard XO line designed for general-purpose timing applications in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 49.35 MHz LVCMOS oscillators from Mercury such as the 18QHTF21-49.8067-OE or 18QHTF21-43.350-OE, provided the frequency difference is acceptable. Verify pin compatibility and voltage levels when cross-referencing.