NUF4310MNTAG

Overview

The NUF4310MNTAG is a four-channel EMI filter and ESD protection device from onsemi, housed in an 8-WDFN package. It integrates a CR-PII low-pass filter architecture with typical component values of R = 100 Ω and C = 9 pF per channel. This configuration yields a cutoff frequency (f_3dB) of approximately 185 MHz. The device provides greater than -25 dB attenuation in the stopband ranging from 800 MHz to 4.0 GHz. It supports parallel interfaces with data rates up to 124 Mbps while effectively suppressing interference from 2G/3G, GPS, Bluetooth, and WLAN signals.

Feature Summary

• Integrates four-channel EMI filtering with electrostatic discharge protection in a compact surface-mount package
• Provides robust ESD immunity meeting IEC 61000-4-2 Level 4 contact discharge standards
• Utilizes a CR-PII topology to achieve effective high-frequency signal attenuation without compromising low-speed data integrity

Applications

• Filtering electromagnetic interference on LCD display data lines
• Protecting camera module interface connections from noise and static discharge
• Shielding general-purpose I/O ports and keyboard matrices against EMI and ESD events

Procurement Notes

Verify the complete part number including the TAG suffix to ensure correct packaging and tape-and-reel specifications. Confirm that the WDFN8 exposed pad thermal requirements align with your PCB layout design. Ensure compatibility with RoHS directives if environmental compliance is required for your specific manufacturing region or end-product regulations.

Selection Notes

Select this component when designing circuits requiring simultaneous EMI suppression and ESD protection for multiple parallel data lines. It is suitable for applications where board space is limited and discrete components would otherwise increase the bill of materials. Consider its 185 MHz cutoff frequency to ensure it does not attenuate desired signal frequencies below this threshold while still blocking higher-frequency noise sources.

Part Context

This device belongs to onsemi's portfolio of integrated passive devices designed for signal integrity enhancement. It addresses the growing need for compact solutions in portable electronics where multiple signal lines require protection from both radiated emissions and human-body model electrostatic discharges. The integration reduces component count compared to using separate filters and TVS diodes.

Replacement Considerations

Check for pin-compatible alternatives within the same family that may offer different capacitance values or channel counts. Verify that any substitute maintains the same WDFN8 package dimensions and thermal characteristics to ensure mechanical fit without redesigning the footprint.

FAQ

What is the maximum ESD protection capability of each channel?

Each channel provides ±8.0 kV ESD protection capability according to the IEC 61000-4-2 standard for contact discharge.

Does the device affect low-speed digital signals?

No, the 185 MHz cutoff frequency allows it to support data rates up to 124 Mbps without significant signal degradation.