18QHTF21-25.250-PD

Oscillators Overview

The 18QHTF21-25.250-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 25.25 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby (power down) function to reduce power consumption when inactive. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm.

Oscillators Feature Summary

• Standard XO configuration with LVCMOS output logic
• Integrated standby (power down) capability
• Compact 4-SMD no lead surface mount package

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system power architecture. Ensure the 2.0x1.6mm footprint matches the PCB layout constraints. Cross-reference the datasheet for any specific handling or soldering recommendations associated with the no-lead package type.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a precise 25.25 MHz reference. The choice is driven by the need for a small form factor suitable for dense PCB layouts. Consider the standby feature if power management during idle states is a priority. Evaluate compatibility with LVCMOS interfaces used in the downstream digital logic.

Oscillators Part Context

This part belongs to the Mercury QHTF series of surface-mount crystal oscillators. The series offers various frequencies and voltage options within similar physical footprints. The 'PD' suffix indicates the inclusion of a power-down pin or function. Mercury Electronics has produced frequency control products since 1973, establishing this component as part of their standard catalog offerings.

Oscillators Replacement Considerations

Direct substitutes include other 25.25 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson or SiTime, provided voltage and pinout compatibility are verified. Check for equivalent frequency stability and phase noise specifications if the application is sensitive to jitter.