18QHTF21-49.4033-PD

Overview

The 18QHTF21-49.4033-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4033 MHz with LVCMOS output logic. The device supports a supply voltage of 1.8V and features a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode to reduce power consumption
• Compact 4-SMD no-lead surface mount package design

Applications

• Digital signal processing systems
• Communication equipment clock sources
• Embedded system timing references

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's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official datasheet to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a specific 49.4033 MHz frequency. The LVCMOS output is appropriate for standard digital logic families. Consider the standby feature if power efficiency is a critical design constraint. Verify that the operating temperature range meets the environmental conditions of the intended application environment.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz crystals and oscillators, offering various packages and frequencies. This specific model utilizes a surface-mount form factor, distinguishing it from through-hole alternatives in their broader portfolio.

Replacement Considerations

Direct substitutes must match the 49.4033 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check for equivalent standby functionality and identical pinout configurations to ensure board-level compatibility without redesign.