The 33990 is a serial transceiver designed to provide bi-directional half-duplex communication meeting the automotive SAE Standard J- 1850 Class B Data Communication Network Interface specification. It is designed to interface directly to on-board vehicle microcontrollers and serves to transmit and receive data on a single-wire bus at data rates of 10.4 kbps using Variable Pulse Width Modulation (VPWM).
The MC33990 is a serial transceiver designed for SAE J‑1850 Class B automotive networks. It interfaces directly to vehicle microcontrollers, converting 5 V CMOS logic to the 0‑7 V bus waveform and operates from a 12 V vehicle battery.
The document includes pin assignments, maximum ratings, static and dynamic electrical characteristics, performance curves, and ordering information, enabling designers to integrate the part into automotive communication systems.
| Supply Voltage (VBAT) | -16 V to 40 V |
|---|---|
| Operating Ambient Temperature | -40 °C to 125 °C |
| ESD Human Body Model Voltage | +2000 V |
The device operates from a DC supply voltage (VBAT) of –16 V to 40 V.
The device is rated for an operating ambient temperature from –40 °C up to 125 °C.