18QHTF21-11.046-PD

Overview

The 18QHTF21-11.046-PD is a quartz crystal resonator manufactured by Mercury Electronics Ind. Co. Ltd, designed for precision timing applications in electronic circuits. This component operates at a fundamental frequency of 11.046 MHz and utilizes a parallel resonant mode configuration to ensure stable oscillation within clock generator or microcontroller systems. The device features a specified load capacitance of 18 pF, which is critical for matching the external circuit requirements to achieve accurate frequency output. It is housed in a standard SMD package designated as 18QHTF21, offering surface mount compatibility for automated assembly processes. The unit exhibits a frequency tolerance of ±30 ppm at room temperature, providing reliable performance for general-purpose digital logic interfaces.

Feature Summary

• Provides stable oscillation through parallel resonant mode operation with defined load capacitance matching.

Applications

• Microcontroller clock generation circuits
• Digital logic interface timing references
• General-purpose oscillator circuits requiring 11 MHz stability

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance and operating temperature range specifications. Confirm the package type aligns with the PCB footprint design guidelines provided in the mechanical drawing. Ensure the load capacitance requirement of the target circuit matches the component's rated value to prevent frequency deviation during production integration.

Selection Notes

Select this component when a fundamental frequency of 11.046 MHz is required with moderate stability standards. Consider the parallel resonant characteristics for compatibility with standard capacitive load networks. Evaluate the thermal stability requirements against the specified operating temperature range before finalizing the bill of materials for the design.

Part Context

This part belongs to Mercury Electronics' series of surface mount quartz crystal resonators intended for consumer and industrial electronics. The 18QHTF21 designation indicates a specific physical form factor optimized for high-volume surface mount technology assembly lines. These components serve as primary timekeeping elements in devices where precise frequency division or clock synchronization is necessary for data transmission and processing tasks.

Replacement Considerations

Consult official cross-reference lists for direct substitutes from Mercury Electronics or other manufacturers offering identical 11.046 MHz parallel resonant crystals in compatible packages. Verify electrical parameters such as load capacitance and equivalent series resistance before substitution.