18QHTF21-74.180-PD

Overview

The 18QHTF21-74.180-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 74.18 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes 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

• Standard XO configuration with LVCMOS output
• Integrated standby and power-down functionality
• Compact 4-SMD No Lead surface-mount package

Applications

• General electronic timing circuits
• Digital signal processing systems
• Communication equipment requiring precise clock signals

Procurement Notes

Verify the specific part number suffix to ensure compatibility with required voltage levels and output types. Confirm that the 1.8V supply requirement aligns with the target system design. Ensure the 4-SMD No Lead package footprint matches the PCB layout specifications before procurement.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a small form factor. The LVCMOS interface is suitable for direct connection to digital logic inputs. Consider the power-down feature if system-level power efficiency is a priority during idle states.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 2.0x1.6 mm package. The series provides options for different supply voltages and output logic families, allowing designers to choose based on specific circuit requirements while maintaining consistent physical dimensions.

Replacement Considerations

Direct substitutes include other variants within the 18QHTF21 series, such as the 18QHTF21-38.680-PD or 18QHTF21-6.000-PD, provided the frequency difference is acceptable for the application. Cross-brand replacements require matching the 4-SMD No Lead package, 1.8V voltage, and LVCMOS output characteristics.