AS-9.8304-18-SMD-TR

Crystals Overview

The AS-9.8304-18-SMD-TR is a fundamental mode quartz crystal resonator manufactured by Raltron Electronics, designed for microprocessor clock applications. It operates at a nominal frequency of 9.8304 MHz with a load capacitance of 18 pF. The component exhibits a frequency tolerance of ±30 ppm at 25°C and a total frequency deviation of ±50 ppm across the operating temperature range of -20°C to +70°C. The equivalent series resistance (ESR) is specified at 60 Ω maximum, supporting standard MCU drive capabilities. Annual aging is limited to ±5 ppm per year, ensuring long-term stability for embedded systems.

Crystals Feature Summary

• Fundamental oscillation mode optimized for low-profile surface mount integration in compact designs.
• Frequency selection specifically suited for UART and RS485 serial communication interfaces to minimize baud rate error.
• Compliant with lead-free reflow soldering processes and moisture sensitivity level 1 classification.

Crystals Applications

• Microprocessor clock sources for embedded controllers
• Serial communication gateways utilizing RS485 or UART protocols
• Industrial IoT devices requiring stable timing references

Crystals Procurement Notes

Verify that the specific order suffix matches the required frequency tolerance and temperature range specifications. Confirm package dimensions align with PCB footprint requirements. Ensure compliance with RoHS and REACH directives if exporting to regulated regions. Check manufacturing date codes via silkscreen markings to assess inventory age and potential aging impact on initial frequency accuracy.

Crystals Selection Notes

Select this component when designing circuits requiring precise division for standard serial baud rates such as 9600 or 115200 bps. Ensure the host microcontroller's oscillator circuit can support the specified ESR and drive level without exceeding maximum power limits. Verify that the system's operational environment remains within the -20°C to +70°C range to maintain specified frequency stability.

Crystals Part Context

This part belongs to the AS-SMD series of low-profile surface mount crystals from Raltron Electronics. The series targets cost-effective yet reliable timing solutions for consumer and industrial electronics. The model designation indicates a 9.8304 MHz frequency, 18 pF load capacitance, and SMD packaging format suitable for automated assembly processes.

Crystals Replacement Considerations

Substitute only with components sharing identical electrical parameters: 9.8304 MHz frequency, 18 pF load capacitance, and fundamental mode operation. Verify physical footprint compatibility and mounting type. Cross-reference manufacturer datasheets to confirm matching ESR and aging specifications before implementation.