LFXTAL003218BULK

Overview

The LFXTAL003218BULK is a through-hole quartz crystal resonator manufactured by IQD Frequency Products. It operates at a nominal frequency of 14.7456 MHz with a load capacitance of 30 pF. The component features a frequency tolerance and stability of ±20 ppm and ±30 ppm respectively, ensuring precise timing for digital circuits. It utilizes an HC-49/4H package with radial leads spaced at 4.88 mm, suitable for standard PCB layouts. The unit supports a minimum operating temperature of -20°C and a maximum of +70°C. Key electrical characteristics include an equivalent series resistance (ESR) of 300 Ohms and a drive level of 1 mW. The device is supplied in bulk packaging.

Feature Summary

• Hermetic sealing using inert gas and glass-metal pin junctions to enhance moisture and dust resistance
• Resistive welding construction for robust mechanical integrity
• Fundamental mode operation eliminating the need for external overtone selection components

Applications

• Industrial Modbus gateways requiring stable serial communication
• UART interfaces demanding zero-error baud rate generation
• Embedded systems utilizing integer-divided clock frequencies

Procurement Notes

Verify current availability as production cycles may extend beyond standard lead times. Confirm minimum order quantities for bulk orders exceeding immediate stock levels. Ensure the specified HC-49/4H package matches your PCB footprint requirements. Check RoHS compliance documentation if required for your specific manufacturing standards. Validate that the 30 pF load capacitance aligns with your circuit design specifications before finalizing procurement.

Selection Notes

Select this component when designing serial communication interfaces that require exact integer division for common baud rates such as 9600, 115200, or 921600 bps. The 14.7456 MHz frequency prevents bit errors caused by fractional clock drift. Choose this model over higher-frequency alternatives if lower electromagnetic interference is desired, as it avoids the complexity and noise associated with frequency multiplier circuits. Ensure the circuit can support the 300 Ohm ESR characteristic.

Part Context

This part belongs to the HC49/4H series of quartz crystals from IQD Frequency Products, now part of the Wurth Group. IQD provides a comprehensive range of frequency control solutions for industrial, automotive, and consumer applications. The HC-49/4H package is a standard through-hole form factor widely used in legacy and modern electronics for reliable oscillation. This specific model represents a fundamental frequency variant optimized for digital logic timing.

Replacement Considerations

Direct substitutes within the same family include LFXTAL003218REEL for reel packaging. Cross-manufacturer equivalents must match the 14.7456 MHz frequency, 30 pF load capacitance, and HC-49/4H physical dimensions. Verify that alternative parts maintain similar ESR and drive level specifications to ensure circuit stability.