18QHTF21-9.850-PD

Overview

The 18QHTF21-9.850-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 9.85 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly.

Feature Summary

• Integrates LVCMOS output logic for digital signal compatibility
• Features a standby mode to reduce power consumption during idle periods
• Designed with a leadless SMD package for automated surface-mount processing

Applications

• General-purpose clock generation in electronic circuits
• Timing reference sources for digital systems
• Embedded devices requiring low-voltage operation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Selection Notes

Select this component when a precise 9.85 MHz timing source is required with low voltage operation. Consider the LVCMOS interface for direct connection to compatible digital logic families. Evaluate the power-down feature if battery life or thermal management is critical. Compare the physical dimensions of the 4-SMD package against available board space to ensure mechanical fit within the final assembly.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The suffix PD indicates the inclusion of a power-down control pin. These oscillators are designed for applications needing stable clock signals in compact form factors.

Replacement Considerations

Direct replacements must match the 9.85 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical specifications before substitution.