MAX3054 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – ±80V Fault-Protected/Tolerant CAN Transceivers for In-Car Applications

19-2687; Rev 0; 11/02
±80V Fault-Protected/Tolerant CAN
Transceivers for In-Car Applications
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.
Automotive
Applications
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)
Ordering Information
PART
TEMP RANGE
DATA RATE
PIN-
PACKAGE
MAX3054ASD -40°C to +125°C 250kbps 14 SO
MAX3055ASD -40°C to +125°C ^{Slew control} 14 SO
125kbps
MAX3056ASD
-40°C to +125°C
Slew control
40kbps
14 SO
Typical Operating Circuit
V_BATT +12V
CAN CONTROLLER
BATTERY
+5V
23 5 6
TXD RXD STB EN
41
ERR INH
10
V_CC
7
WAKE
MAX305_
13
GND
100nF
RTH
8
CAN BUS
CANH CANL
11 12
14
BATT
RTL
9
FAULT
TO ±80V
Pin Configuration
TOP VIEW
INH 1
TXD 2
RXD 3
ERR 4
STB 5
EN 6
WAKE 7
MAX3054
MAX3055
MAX3056
14 BATT
13 GND
12 CANL
11 CANH
10 V_CC
9 RTL
8 RTH
SO
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