18QHTF21-9.9008-PD

Overview

The 18QHTF21-9.9008-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 9.9008 MHz and utilizes LVCMOS output logic. The device is designed for a 1.8V supply voltage and features a standby or power-down function to reduce consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm by 1.6mm. This component is suitable for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Integrates LVCMOS output logic for direct interfacing with standard digital circuits
• Includes a standby mode capability to minimize power usage when not in active operation
• Constructed in a small surface-mount footprint optimized for space-constrained designs

Applications

• Portable electronic devices requiring low-power clock sources
• Battery-operated consumer electronics
• Digital signal processing systems
• Communication modules needing stable frequency references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB layout accommodates the 2.0x1.6mm SMD package dimensions and soldering specifications provided in the official datasheet to guarantee reliable performance.

Selection Notes

Select this model when a 9.9008 MHz frequency is specifically required for system synchronization. Consider the LVCMOS interface compatibility with your microcontroller or FPGA inputs. Evaluate the power-down feature if energy efficiency is critical for the end application. Compare against other Mercury series oscillators to ensure the package size and voltage meet all mechanical and electrical constraints.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options, including 1.8V variants. These components are generally used as primary clock sources in modern electronics where size and power consumption are key design factors.

Replacement Considerations

Direct replacements must match the 9.9008 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Check Mercury part numbers like 18QHTF21-9.9000-PD for similar frequencies if exact matches are unavailable. Verify pinout compatibility and thermal characteristics before substituting.