What the 90 Ohm rating means for your signal line
The TDK ACM2012D-900-2P-T00 is a 2-line common mode filter from the ACM-D series, designed to suppress conducted EMI on differential signal pairs. Its 90 Ohm impedance at 100 MHz targets common-mode noise coupling into high-speed data lines like USB 2.0, LVDS, or CAN bus, where the filter's common-mode choke structure attenuates unwanted currents without distorting the differential signal.
NRND status and what it means for procurement
This means the part is still available for existing production but is not intended for new board spins. For a buyer managing an active BOM, the NRND flag signals a planning window: confirm the remaining lifecycle commitment from your distributor and evaluate a pin-compatible alternative from the same ACM-D series or a broader common-mode filter family before the part enters end-of-life.
The 4-pad layout connects the two signal lines through the common-mode choke — the outer pads carry the differential pair, and the inner pads are the common-mode return path. The 20 V DC voltage rating covers most low-voltage signal rails. The filter is supplied on tape and reel (Cut Tape also available), compatible with standard pick-and-place assembly.