18QHTF21-40.490-OE

Oscillators Overview

The 18QHTF21-40.490-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 40.49 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Utilizes a leadless SMD package for automated assembly

Oscillators Applications

• General purpose clock signal generation
• Digital circuit timing reference
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Ensure the 1.8V supply voltage aligns with the system power rails. Confirm that the enable pin logic levels are compatible with the controlling microcontroller or FPGA to ensure proper operation and power state control.

Oscillators Selection Notes

Select this component when a 40.49 MHz clock source is required with low voltage operation. Consider the 4-SMD no-lead package for space-constrained designs. Evaluate the need for active enable control versus always-on operation. Compare performance metrics such as jitter and stability if available in official documentation against alternative frequencies in the same series.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various standard frequencies. The series typically provides LVCMOS outputs and support for different supply voltages. The 'OE' suffix may indicate specific ordering or packaging variations defined by the manufacturer. This model represents one specific frequency point within the broader product line.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 models with identical pinout and electrical characteristics but different frequencies, provided the system allows frequency adjustment. Cross-reference with other manufacturers offering 4-SMD LVCMOS oscillators at 1.8V, ensuring footprint and voltage compatibility match exactly.