18QHTF21-40.240-PD

Oscillators Overview

The 18QHTF21-40.240-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 40.24 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function via standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component provides precise timing signals suitable for digital circuits requiring low-power operation and small form factors.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital systems
• Includes standby mode capability for power-down functionality
• Utilizes a compact 4-SMD no lead surface mount package

Oscillators Applications

• Portable electronic devices requiring low power consumption
• Digital communication systems utilizing LVCMOS interfaces
• Embedded timing applications in compact hardware designs

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly and long-term performance stability.

Oscillators Selection Notes

Select this model when a 40.24 MHz clock signal is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint and the need for a power-down feature. The small 4-SMD package makes it suitable for space-constrained layouts. Evaluate if the standard frequency accuracy meets your application's timing precision needs compared to TCXO alternatives.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage crystal oscillators. The series typically offers various frequencies within a standardized small outline package. The 'PD' suffix indicates the inclusion of a power-down pin or function, allowing for active standby states to reduce overall system power consumption during idle periods.

Oscillators Replacement Considerations

Direct substitutes must match the 40.24 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility, specifically the power-down control pin configuration. Cross-reference specifications for frequency stability and phase noise if the application demands high precision.