CM1485-02SE

Overview

The onsemi CM1485-02SE is a dual-channel low-pass EMI filter integrated with electrostatic discharge (ESD) protection, housed in a compact SC-70 package. Each channel incorporates a PI-filter topology consisting of two 12pF capacitors and a central 100 Ohm resistor. This configuration provides a cutoff frequency of 125 MHz, effectively attenuating high-frequency noise while preserving signal integrity for high-speed data lines. The device offers robust protection against transient voltage events, ensuring reliable operation in sensitive electronic interfaces.

Feature Summary

• Integrates dual-channel RC(PI) filtering with built-in ESD protection capabilities
• Provides effective attenuation of electromagnetic interference through a 125 MHz cutoff frequency design
• Utilizes a compact surface-mount package suitable for space-constrained printed circuit board layouts

Applications

• High-speed data line protection in portable consumer electronics
• EMI suppression for USB and other high-bandwidth interface connections
• Signal conditioning for sensitive communication ports requiring combined filtering and surge protection

Procurement Notes

Verify the specific suffix '02SE' to ensure correct packaging and tape-and-reel specifications. Confirm that the SC-70 footprint matches your PCB design constraints. Ensure compatibility with the required 125 MHz cutoff performance for your specific data rate application before finalizing component selection.

Selection Notes

Select this component when both EMI filtering and ESD protection are required on the same signal path. The integrated PI-filter structure simplifies bill of materials by replacing discrete components. Verify that the 125 MHz cutoff frequency aligns with the bandwidth requirements of the protected interface to avoid signal degradation.

Part Context

This device belongs to onsemi's family of integrated passive devices designed for signal integrity management. It combines passive filtering elements with semiconductor protection structures. The integration reduces component count and assembly complexity compared to using separate filters and TVS diodes, offering a streamlined solution for modern high-density electronics.

Replacement Considerations

Check for direct pin-compatible alternatives within the CM1485 series or similar PI-filter ESD protectors from other manufacturers. Ensure any substitute maintains the 125 MHz cutoff frequency and 100 Ohm resistance values to preserve signal integrity characteristics.