MC33388D

Controllers Overview

The MC33388 is a fault-tolerant CAN physical layer interface designed for automotive body electronics. It supports differential and single-wire transmission modes with baud rates from 10kBaud to 125kBaud. The device operates on a VDD supply of 4.75V to 5.25V and a VBAT supply of 6V to 27V, sustaining up to 40V during load dump conditions. Typical standby current is 15µA. It features internal bus driver slope control to minimize RFI, thermal protection at 165°C, and automatic switching to single-wire mode upon detecting specific bus faults.

Controllers Feature Summary

• Automatic transition to single-wire operation during bus failures to maintain communication
• Integrated wake-up logic triggered by bus activity or the WAKE pin input
• Comprehensive protection against short circuits to battery, ground, and VDD

Controllers Applications

• Automotive body electronic multiplexing systems
• Low-speed CAN networks requiring fault tolerance
• Applications utilizing unshielded twisted pair bus wiring

Controllers Procurement Notes

Verify the component status as archived data indicates potential end-of-life status. Confirm package availability in SO-14 format. Ensure compatibility with existing system voltage requirements and temperature ranges before procurement.

Controllers Selection Notes

Select this device for applications requiring robust fault tolerance in low-speed automotive networks. Ensure external termination resistors are connected to RTH and RTL pins. Verify that the INH pin correctly controls the external voltage regulator for power management.

Controllers Part Context

Manufactured originally by Motorola and later acquired by Freescale Semiconductor, now part of NXP USA Inc. The datasheet revision 2.3 was archived by Freescale in 2008. This component belongs to the family of CAN interface ICs used for physical layer connectivity.

Controllers Replacement Considerations

MC33388D

Controllers FAQ

How does the MC33388 handle bus failures?

The device automatically detects bus failures and switches to single-wire mode to maintain communication. It continuously monitors the bus and reverts to differential mode once the fault condition disappears.

What is the function of the INH pin?

The INH pin controls an external voltage regulator. It is active in Normal, Receive Only, and Standby VBAT modes to keep the regulator on, and switches off in Sleep mode to reduce power consumption.

Can the MC33388 wake up from sleep mode?

Yes, it supports wake-up via bus messages detected on CANH/CANL or via transitions on the dedicated WAKE pin. It also wakes up if VBAT drops below a threshold indicating a power loss event.