18QHTF21-25.1658-PD

Oscillators Overview

The 18QHTF21-25.1658-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 25.1658 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range typical for commercial applications, providing a stable clock signal for digital circuits requiring precise timing.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital components
• Includes standby mode functionality for power management
• Utilizes a leadless surface-mount package for automated assembly

Oscillators Applications

• Clock generation for microprocessors and microcontrollers
• Timing reference for communication interfaces
• Synchronization in consumer electronic devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure the 1.8V supply voltage aligns with the system's power rails. Confirm that the 4-SMD no-lead package footprint matches the PCB layout specifications to prevent soldering defects during assembly.

Oscillators Selection Notes

Select this component when a low-voltage, small-form-factor oscillator is required for space-constrained designs. The LVCMOS output is suitable for standard logic families. Consider the standby feature if power efficiency is a priority. Compare against other frequencies in the 18QHTF21 series to ensure the 25.1658 MHz rate meets the system's timing needs.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The 'PD' suffix indicates the presence of a power-down pin. This model provides a balance between size and performance for portable electronics.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 models with identical 25.1658 MHz frequency and 1.8V operation. Cross-reference with similar 2.0x1.6mm LVCMOS oscillators from other manufacturers if availability is an issue, ensuring pin compatibility and electrical parameters match.