CM1426-04CP

Overview

The CM1426-04CP is a four-channel EMI filter circuit with integrated ESD protection, manufactured by onsemi. It utilizes an RC (Pi) filter topology to suppress electromagnetic interference in high-speed data lines. Each channel incorporates a capacitance of 8.5 pF and a series resistance of 100 Ohms, resulting in a cutoff frequency of 230 MHz. The device supports data rates up to 92 Mbps and operates within a temperature range of -40°C to +85°C. It is housed in a compact CSP-11 package with dimensions of 1.96 mm x 1.33 mm x 0.72 mm, designed for surface-mount applications.

Feature Summary

• Integrates EMI filtering and ESD protection in a single compact component
• Utilizes RC Pi-filter topology for effective noise suppression
• Supports high-speed data transmission up to 92 Mbps
• Features avalanche-type protection mechanisms

Applications

• High-speed data line protection in portable electronics
• Audio filter combo circuits for headsets and speakers
• EMI suppression in mobile communication devices
• Protection for USB and other high-speed interfaces

Procurement Notes

Verify the specific suffix (e.g., -04CP) against the official datasheet to ensure correct channel count and package type. Confirm RoHS compliance status and lead times directly with authorized distributors or onsemi. Ensure storage conditions align with moisture sensitivity levels specified in the manufacturing documentation. Cross-reference part numbers with current obsolescence notices to avoid procurement of discontinued variants.

Selection Notes

Select this component when designing circuits requiring combined EMI filtering and ESD protection for four differential or single-ended lines. The 230 MHz cutoff frequency makes it suitable for signals below this threshold, such as audio or lower-speed digital interfaces. Consider the small CSP-11 footprint if board space is constrained. Evaluate thermal performance within the -40°C to +85°C operating range for your specific application environment.

Part Context

The CM1426 belongs to onsemi's family of EMI filter circuits designed for consumer electronics. It addresses the growing need for compact protection solutions in mobile devices where space is limited. The integration of filtering and protection reduces component count and simplifies PCB layout compared to discrete solutions.

Replacement Considerations

Check for direct substitutes within the CM1426 series, such as CM1426-06CP or CM1426-08CP, which offer different channel counts but similar electrical characteristics. Verify pin compatibility and package dimensions before substitution.