18QHTF21-49.400-PD

Overview

The 18QHTF21-49.400-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 49.4 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode capability
• Provides LVCMOS signal output

Applications

• General clock generation
• Digital signal processing systems
• Embedded timing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply rail is stable and within the specified operating range to ensure reliable oscillator performance and longevity.

Selection Notes

Select this component when a precise 49.4 MHz reference is required in space-constrained designs. Ensure compatibility with LVCMOS interfaces and verify that the 2.0x1.6 mm footprint fits the PCB layout constraints without interference from adjacent components.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies in a small form factor, targeting applications needing reliable timing solutions with low power consumption and standard digital interface compatibility.

Replacement Considerations

Check datasheets for compatible parts with matching 49.4 MHz frequency, 1.8V supply, and LVCMOS output. Verify pinout and mechanical dimensions to ensure direct replacement without PCB redesign.