18QHTF21-25.0005-PD

Oscillators Overview

The 18QHTF21-25.0005-PD is a 25.0005 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates on a 1.8V supply voltage. The component features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby or power-down functionality to reduce power consumption
• Designed for surface mount assembly in space-constrained applications

Oscillators Applications

• Portable electronic devices requiring low power operation
• Digital signal processing circuits
• Communication modules utilizing standard clock interfaces

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure joint integrity during assembly processes.

Oscillators Selection Notes

Select this component when a precise 25.0005 MHz clock source is required with minimal power usage. The LVCMOS interface ensures compatibility with standard CMOS logic families. The small form factor makes it suitable for dense board layouts. Consider the operating temperature range if the device will be used in extreme environmental conditions compared to standard commercial grade alternatives.

Oscillators Part Context

This part belongs to the QHTF series of oscillators from Mercury Electronics, which specializes in frequency control products. The series typically offers various frequencies and supply voltages. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from continuous-operation variants within the same family.

Oscillators Replacement Considerations

Direct replacements include other 25.0005 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD 2.0x1.6mm footprints. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before substituting.