This is a document about the development of a high-speed CAN bus system basis chip by Motorola, Inc. The chip integrates many functions frequently used by automotive ECUs, including two voltage regulators, four high voltage inputs, and a 1Mbaud CAN physical interface.
The Motorola MC33989 is a monolithic integrated circuit designed as a System Basis Chip (SBC) combining functions frequently used by automotive Electronic Control Units (ECUs). It integrates two voltage regulators, four high-voltage inputs, and a 1Mbaud CAN physical interface. The device features low standby current consumption in stop and sleep modes to support battery-powered applications.
| Supply Voltage Range (Nominal) | 5.5V to 18V |
|---|---|
| Extended Supply Voltage Range | 4.5V to 27V |
| Maximum Transient Voltage | 40V |
| CAN Interface Speed | 1Mbaud |
| Vdd1 Output Current Capability | 200mA |
| HS1 Output Current Capability | 150mA |
| Operating Temperature Range | -40°C to 125°C |
The nominal DC operating voltage ranges from 5.5V to 18V.
Yes, it supports an extended range down to 4.5V and up to 27V with reduced functionality.
The device can withstand a maximum transient voltage of 40V.