18QHTF21-71.135-PD

Overview

The 18QHTF21-71.135-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 71.135 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm. This component is designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Standby power-down capability
• Compact 4-SMD no-lead package

Applications

• Digital signal processing systems
• Communication equipment timing
• Microcontroller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with the target circuit design. Confirm that the 4-SMD no-lead package footprint matches the PCB layout specifications to prevent assembly issues.

Selection Notes

Select this oscillator when a 71.135 MHz reference is required with low-voltage operation. Consider the LVCMOS compatibility with downstream digital logic. Evaluate the thermal performance within the specified operating temperature range. Verify that the standby feature meets power consumption constraints for the application.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies with consistent 1.8V LVCMOS outputs. The 'PD' suffix indicates the inclusion of a power-down control feature. The 4-SMD package provides a small form factor suitable for dense PCB layouts.

Replacement Considerations

Direct substitutes must match the 71.135 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics. Check if alternative manufacturers offer equivalent timing accuracy and phase noise specifications.