The MC33990 provides bi-directional half-duplex communication meeting the automotive SAE Standard J1850 Class B Data Communication Network Interface specification.It interfaces directly to microcontrollers,serves to transmit and receive single wire bus data at 10.4 kb/s using Variable Pulse Width Modulation,operates from vehicles 12 V battery or board level DC power source and shifts microcontrollers 5.0 V CMOS logic level signals to 0 to 7.0 V reduced radiated EMI wave shaped signals.A tristateable 4X/Loop pin invokes Normal or Disabled Wave Shaping,or Looped-Back Tx output to Rx signal after being wave shaped but not transmitted over the bus to check bus integrity. The MC33990 is designed to enhance robustness to a double fault condition. (Loss and reconnection Of module battery while module ground is lost.)
MC33990 removed from active portfolio. Possible Replacement Part: None
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