19-2687; Rev 0; 11/02
±±0ꢀ Faultꢁ-rotected/Tolerant CAN
Transceivers for InꢁCar Applications
General Description
Features
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.
o Pin and Functionally Compatible with TJA1054
o ±±0ꢀ Fault Pꢁotection ꢂuitable ꢃoꢁ 4ꢄꢀ ꢅatteꢁy
ꢂystems
o Low RFI/Excellent EMC Immunity
o Full Wake-Up Capability Duꢁing Failuꢁe Modes
o ꢅus-Failuꢁe Management
The extended fault-protected voltage range of CANH
and CANL bus lines of ±±0ꢀ allows for use in 4ꢁꢀ
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.
o ꢂuppoꢁt ꢂingle-Wiꢁe Tꢁansmission Mode with
Gꢁound Oꢃꢃset ꢀoltages Up to 1.5ꢀ
o Theꢁmally Pꢁotected
o Do Not Distuꢁb the ꢅus Line when Unpoweꢁed
o Low-Cuꢁꢁent ꢂleep and ꢂtandby Mode with Wake-
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.
Up Thꢁough ꢅus Lines
o Up to ꢄ50kbps Data Rate (MAX3054)
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 ꢁ50kbps. The
MAX3055 is used for data rates of 1ꢁ5kbps and the
MAX3056 is designed for 40kbps applications. For the
40kbps and 1ꢁ5kbps versions, a built-in slope-control
feature allows the use of unshielded cables, and receiv-
er input filters guarantee high noise immunity.
Ordering Information
PIN-
PACKAGE
PART
TEMP RANGE DATA RATE
MAX3054ASD -40°C to +1ꢁ5°C
MAX3055ASD -40°C to +1ꢁ5°C
ꢁ50kbps
14 SO
Slew control
1ꢁ5kbps
14 SO
14 SO
Slew control
40kbps
MAX3056ASD -40°C to +1ꢁ5°C
Applications
Automotive
Typical Operating Circuit
-in Configuration
V
BATT
+12V
TOP VIEW
BATTERY
CAN CONTROLLER
INH
TXD
RXD
ERR
1
2
3
4
5
6
7
14 BATT
13 GND
12 CANL
+5V
2
3
5
6
4
1
TXD RXD STB EN ERR INH
10
13
11 CANH
V
MAX3054
MAX3055
MAX3056
CC
100nF
7
STB
10
9
V
CC
MAX305_
WAKE
GND
EN
RTL
RTH
14
BATT
WAKE
8
RTL
RTH
8
CANH CANL
11
12
9
FAULT
TO 80V
ꢂO
CAN BUS
________________________________________________________________ Maxim Integrated Products
1
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.