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Product Detailed Parameters
- Description：CMC 320MA 2LN 67 OHM SMD
- Series：ACM-21H
- Mfr：Abracon LLC
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：2
- Current Rating (Max)：320mA
- DC Resistance (DCR) (Max)：300mOhm
- Voltage Rating - DC：20V
- Voltage Rating - AC：-
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Surface Mount
- Size / Dimension：0.079" L x 0.047" W (2.00mm x 1.20mm)
- Height (Max)：0.055" (1.40mm)
- Package / Case：Horizontal, 4 PC Pad
- Inductance @ Frequency：-
- Impedance @ Frequency：67 Ohms @ 100 MHz
- Qualification：-
- Grade：-
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Overview
The ACM-21H-670-T is a two-line common mode choke from the Abracon ACM-21H series, designed for surface mount applications. It features a ferrite core and wirewound construction within an 0805 (2012 metric) package measuring 2.0mm x 1.2mm x 1.0mm. The component provides an impedance of 67 Ohms at 100 MHz with a maximum DC resistance of 300 mOhms. It supports a rated current of 320 mA and operates reliably across a temperature range of -40°C to +85°C.
Feature Summary
- Provides effective common mode noise suppression for high-speed signal lines
- Compact 0805 surface mount footprint suitable for space-constrained designs
- Wirewound ferrite construction ensures stable performance under varying conditions
Applications
- High-Definition Multimedia Interface (HDMI) data line protection
- Universal Serial Bus (USB) port filtering
- Display Data Channel (DDC) signal conditioning
Procurement Notes
Verify the specific suffix 'H' indicates the HDMI-optimized variant within the ACM-21 family. Confirm the 0805 package dimensions match your PCB land pattern requirements. Ensure the 320 mA current rating meets your circuit's operational demands. Check RoHS compliance status if required by your manufacturing standards. Validate the 67 Ohm impedance specification against your target noise frequency spectrum.
Selection Notes
Select this component when a compact form factor is required for HDMI or USB interfaces. The 67 Ohm impedance offers a balance between noise attenuation and signal integrity for high-speed digital lines. Consider the 320 mA current rating to ensure adequate headroom for your application's peak currents. The 0805 package allows for automated assembly in standard SMD production lines.
Part Context
This part belongs to the Abracon ACM-21H series, which specializes in common mode chokes tailored for HDMI applications. The series utilizes wirewound technology on ferrite cores to achieve high impedance in a small surface-mount package. This specific model represents a standardized solution for protecting differential data pairs in consumer electronics and computer peripherals.
Replacement Considerations
Direct substitutes include other 0805 common mode chokes with similar 67 Ohm impedance and 320 mA ratings. Verify pin compatibility and physical dimensions before swapping manufacturers. Alternative Abracon models like ACM-21-670M-T may offer comparable electrical characteristics but require verification of the specific 'H' series optimizations.
