18QHTF21-25.1644-PD

Oscillators Overview

The 18QHTF21-25.1644-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 25.1644 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning at 1.8V. It features a power-down capability via a standby control input to reduce consumption when inactive. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm, suitable for surface-mount assembly.

Oscillators Feature Summary

• Standard crystal oscillator configuration with LVCMOS output interface
• Integrated standby mode for power-down functionality
• Compact 4-SMD no-lead surface-mount package design

Oscillators Applications

• Digital signal processing circuits requiring precise timing
• Communication equipment utilizing standard clock frequencies
• Embedded systems with low-voltage logic requirements

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. 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 in the official datasheet to ensure reliable assembly.

Oscillators Selection Notes

Select this component when a fixed 25.1644 MHz clock source is required for LVCMOS-compatible digital logic. The choice is driven by the need for a low-profile surface-mount solution with power-down capabilities. Consider the 1.8V operating voltage constraint and the specific frequency stability needs of the application. This part is suitable for designs prioritizing space efficiency and controlled power states.

Oscillators Part Context

This model belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequency options within a consistent 2.0x1.6mm form factor. The 'PD' suffix indicates the inclusion of a power-down pin or function. These components are engineered for consumer electronics and portable devices where size and power management are critical constraints.

Oscillators Replacement Considerations

Direct replacements must match the 25.1644 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications. Cross-reference with other manufacturers offering similar low-profile XO solutions with standby features.