LFXTAL078435BULK

Overview

The LFXTAL078435BULK is a fundamental mode quartz crystal manufactured by IQD Frequency Products. It operates at a nominal frequency of 20.0 MHz with a load capacitance of 20 pF. The component features a HC-49/US package and supports through-hole mounting. Key electrical parameters include a frequency tolerance of ±30 ppm, frequency stability of ±50 ppm over the operating range, and a maximum equivalent series resistance (ESR) of 40 Ohms. The drive level is limited to 500 µW. The unit functions within an operating temperature range of -20°C to +70°C.

Feature Summary

• Hermetically sealed in an inert atmosphere using resistance welding and glass-to-metal seals on leads for environmental protection.
• Fundamental vibration mode operation ensures stable oscillation characteristics for timing applications.

Applications

• General-purpose clock signal generation in electronic circuits
• Microcontroller system timing references
• Industrial control equipment requiring standard leaded crystal components

Procurement Notes

Verify the specific suffix 'Bulk' indicates loose packaging rather than tape-and-reel configuration when planning assembly processes. Confirm that the HC-49/US package dimensions align with the target PCB footprint and hole spacing requirements. Ensure the operating temperature range of -20°C to +70°C meets the environmental specifications of the final application environment before procurement.

Selection Notes

Select this component when a fundamental mode crystal with a 20.0 MHz frequency and 20 pF load capacitance is required. The HC-49/US package is suitable for through-hole mounting where space constraints allow for larger footprints compared to surface-mount alternatives. Consider the ±30 ppm initial tolerance and ±50 ppm total stability if precise long-term frequency accuracy is critical for the system design.

Part Context

This part belongs to the IQD Frequency Products quartz crystal portfolio, which includes various frequencies and packages. The LFXTAL series typically offers industry-standard leaded packages designed for reliability. This specific model utilizes the common HC-49/US form factor, widely used in legacy and current electronics designs requiring robust, hermetically sealed timing elements.

Replacement Considerations

Direct substitutes must match the 20.0 MHz frequency, 20 pF load capacitance, and HC-49/US package. Verify that alternative manufacturers provide equivalent ESR limits (max 40 Ohms) and drive level specifications (max 500 µW). Ensure the replacement part maintains the same frequency tolerance and stability ratings to guarantee circuit compatibility.