25QHTF21-18.440-PD

Oscillators Overview

The 25QHTF21-18.440-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 18.44 MHz and utilizes an LVCMOS output interface. The device requires a 2.5V supply voltage and supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power reduction
• Surface-mount 4-SMD no lead package design

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to ensure correct voltage and output type specifications. Confirm that the 'PD' suffix aligns with the required power-down functionality. Cross-reference the part number with authorized distributors to validate authenticity and current availability status before finalizing procurement orders.

Oscillators Selection Notes

Select this component when a 18.44 MHz clock source with LVCMOS outputs is required. Ensure the system design accommodates a 2.5V supply rail. Consider the 4-SMD package dimensions for PCB layout constraints. Verify that the standby feature meets power management requirements compared to continuous operation alternatives.

Oscillators Part Context

This oscillator belongs to the 25QHTF21 series from Mercury Electronics, which offers various frequencies within a small form factor. The series typically includes models like 25QHTF21-68.100-PD and 25QHTF21-31.000-PD, sharing similar packaging and electrical characteristics while differing in operating frequency.

Oscillators Replacement Considerations

Direct substitutes include other 18.44 MHz XO components with LVCMOS outputs and 2.5V operation in a 4-SMD package. Verify pinout compatibility and thermal performance before swapping manufacturers.