General Description

The MAX3054/MAX3055/MAX3056 are interfaces

between the protocol controller and the physical wires

of the bus lines in a controller area network (CAN). The

devices provide differential transmit capability and

switch to single-wire mode if certain fault conditions

occur. The MAX3054/MAX3055/MAX3056 guarantee

full wake-up capability during failure modes.

The extended fault-protected voltage range of CANH

and CANL bus lines of ±80V allows for use in 42V

automotive applications. Current-limiting and thermal-

protection circuits protect the transmitter output stage

against overcurrent faults to prevent destruction of the

transmitter output stage. The CANH and CANL lines are

also protected against electrical transients that may occur

in an automotive environment.

The transceiver provides three low-power modes that

can be entered and exited through pins STB and EN.

An output INH pin can be used for deactivation of an

external voltage regulator.

The MAX3054/MAX3055/MAX3056 are designed to pro-

vide optimal operation for a specified data rate. The

MAX3054 is ideal for high data rates of 250kbps. The

MAX3055 is used for data rates of 125kbps and the

MAX3056 is designed for 40kbps applications. For the

40kbps and 125kbps versions, a built-in slope-control

feature allows the use of unshielded cables, and receiv-

er input filters guarantee high noise immunity.

Applications

Automotive

Features

o Pin and Functionally Compatible with TJA1054

o ±80V Fault Protection Suitable for 42V Battery

Systems

o Low RFI/Excellent EMC Immunity

o Full Wake-Up Capability During Failure Modes

o Bus-Failure Management

o Support Single-Wire Transmission Mode with

Ground Offset Voltages Up to 1.5V

o Thermally Protected

o Do Not Disturb the Bus Line when Unpowered

o Low-Current Sleep and Standby Mode with Wake-

Up Through Bus Lines

o Up to 250kbps Data Rate (MAX3054)

±80V Fault-Protected/Tolerant CAN

Transceivers for In-Car Applications

________________________________________________________________ Maxim Integrated Products

1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

BATT

GND

CANL

CANH

ERR

RXD

TXD

INH

TOP VIEW

MAX3054

MAX3055

MAX3056

RTL

RTH

WAKE

EN

STB

SO

Pin Configuration

Ordering Information

TXD RXD

STB

EN

ERR

INH

BATTERY

RTH

CANH CANL

RTL

BATT

GND

WAKE

+5V

CAN CONTROLLER

2

3

564

1

811

12

9

7

10

13

14

100nF

MAX305_

CAN BUS

FAULT

TO

±80V

Typical Operating Circuit

19-2687; Rev 0; 11/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

DATA RATE

PIN-

PACKAGE

MAX3054ASD

-40°C to +125°C

250kbps

14 SO

MAX3055ASD

-40°C to +125°C

Slew control

125kbps

14 SO

MAX3056ASD

-40°C to +125°C

Slew control

40kbps

14 SO