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Product Detailed Parameters
- Description：CMC 100MA 2LN SURFACE MOUNT ESD
- Series：EMI21
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：2
- Current Rating (Max)：100mA
- DC Resistance (DCR) (Max)：8Ohm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：-
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Approval Agency：-
- Features：TVS Diode ESD Protection
- Mounting Type：Surface Mount
- Size / Dimension：0.087" L x 0.079" W (2.20mm x 2.00mm)
- Height (Max)：0.032" (0.80mm)
- Package / Case：8-WFDFN
- Inductance @ Frequency：-
- Impedance @ Frequency：-
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Overview
The onsemi SZEMI2121MTTAG is a surface-mount common mode filter with integrated ESD protection, housed in an 8-lead WDFN package. It features two data lines and operates up to 2 GHz. Key electrical parameters include a typical impedance of 8 Ohms, a maximum current rating of 100 mA, and a breakdown voltage of 5.5 V. The device provides a clamping voltage of 16 V under peak pulse current conditions of 12 A, with a low capacitance of 1.3 pF. It supports electrostatic discharge voltages up to 12 kV and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Integrates common mode filtering with electrostatic discharge (ESD) protection in a single compact component.
- Provides high-speed signal integrity preservation for data lines operating at frequencies up to 2 GHz.
- Offers robust transient suppression capabilities through low-clamping voltage and high peak pulse current handling.
Applications
- Protection of high-speed serial data interfaces such as USB and HDMI.
- Guarding GPIO lines against electrostatic discharge events.
- Shielding audio lines from electromagnetic interference and static discharge.
Procurement Notes
Verify the specific suffix MTAG against the official datasheet to confirm package type and tape-and-reel specifications. Confirm end-of-life status via manufacturer notifications before finalizing design-in decisions. Ensure compatibility with automated assembly processes by validating the WDFN-8 footprint dimensions and soldering profile requirements.
Selection Notes
Select this component when space-constrained designs require combined EMI filtering and ESD protection for dual-line applications. Evaluate the 1.3 pF capacitance to ensure minimal signal distortion at target frequencies. Compare the 8 Ohm impedance against system noise requirements and verify that the 100 mA current rating exceeds the operational load of the protected circuitry.
Part Context
This part belongs to the EMI2121 series of common mode filters designed for portable electronics. It utilizes onsemi's BCD technology platform to integrate passive filtering elements with active protection diodes. The WDFN-8 package allows for high-density PCB layouts, making it suitable for modern mobile devices and compact consumer electronics where board real estate is limited.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability directly with the manufacturer or authorized distributors due to the product's discontinued status.
