SZNUF4403MNT1G

Overview

The SZNUF4403MNT1G is a four-channel EMI filter and ESD protection device from onsemi, housed in an 8-WFDFN exposed pad package. It integrates a C-R-C Pi-type filter array with typical component values of R = 100 Ω and C = 17 pF, achieving a 3 dB cutoff frequency of 105 MHz. The device provides greater than -35 dB attenuation in the 800 MHz to 2.2 GHz band. It offers ±18 kV contact discharge and ±30 kV air discharge ESD protection per IEC 61000-4-2 Level 4 standards. Designed for parallel interfaces up to 70 Mbps, it effectively suppresses interference from 2G/3G, GPS, Bluetooth, and WLAN signals.

Feature Summary

• Integrates four-channel EMI filtering with ESD protection in a compact DFN package
• Provides high-level electrostatic discharge immunity compliant with IEC 61000-4-2 Level 4
• Delivers significant signal attenuation in the 800 MHz to 2.2 GHz frequency range
• Optimized for low capacitance to maintain signal integrity in high-speed data lines

Applications

• EMI filtering for LCD and camera data cables
• Protection for I/O ports and keyboard interfaces
• Suppression of wireless interference in mobile devices

Procurement Notes

Verify the complete part number including the 'SZ' prefix and 'T1G' suffix against official onsemi documentation to ensure correct configuration. Confirm RoHS compliance and lead-free status through current manufacturer certificates. Check for any recent product change notices regarding assembly sites or material composition updates before finalizing procurement specifications.

Selection Notes

Select this component when simultaneous EMI suppression and ESD protection are required for multiple data lines within a limited board area. The integrated design reduces bill of materials count compared to discrete solutions. Ensure the target interface speed does not exceed 70 Mbps to maintain signal fidelity given the 105 MHz cutoff frequency characteristics.

Part Context

This part belongs to the NUF4403 series of integrated EMI filters and ESD protectors. It is functionally equivalent to the NUF4403MN variant but includes specific ordering suffixes indicating tape and reel packaging and compliance certifications. The device serves as a consolidated solution for protecting sensitive digital interfaces in consumer electronics and mobile communication hardware.

Replacement Considerations

The NUF4403MN is a verified substitute part number within the same family. Verify that the replacement matches the 8-WFDFN package dimensions and pinout configuration. Ensure the electrical parameters, specifically the resistance and capacitance values, remain identical to avoid altering the filter's cutoff frequency performance.

FAQ

What is the maximum ESD protection rating for this device?

The device provides ±18 kV contact discharge and ±30 kV air discharge protection according to IEC 61000-4-2 Level 4 standards.

Does this component support differential signaling?

No, the SZNUF4403MNT1G is designed for single-ended parallel interfaces up to 70 Mbps and does not support differential signaling configurations.