18QHTF21-49.4933-PD

Overview

The 18QHTF21-49.4933-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4933 MHz and utilizes LVCMOS output logic levels. The device functions with a supply voltage of 1.8V and includes a standby or power-down control feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports Low Voltage Complementary Metal-Oxide-Semiconductor (LVCMOS) output interface
• Includes standby mode capability for power reduction
• Utilizes surface-mount technology for automated assembly

Applications

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

Procurement Notes

Verify the specific suffix 'PD' confirms the power-down functionality and LVCMOS output type as documented. Ensure the operating voltage requirements align with the 1.8V specification before integration. Confirm that the 4-SMD no-lead package footprint matches the target PCB layout design constraints.

Selection Notes

Select this model when a 49.4933 MHz reference is required for 1.8V logic families. Consider the small 2.0x1.6mm form factor for space-constrained designs. Evaluate the need for standby control against system power management strategies to utilize the power-down feature effectively.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard oscillators for various frequency needs. The manufacturer specializes in quartz crystals and timing components. The 18QHTF21 series indicates a specific family of surface-mount oscillators with standardized pinouts and electrical characteristics for general-purpose timing applications.

Replacement Considerations

Direct substitutes must match the 49.4933 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent frequency stability and load current specifications from alternative suppliers to ensure circuit compatibility.