19-2670; Rev 0; 10/02
卤80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
General Description
The MAX3050/MAX3057 interface between the CAN
protocol controller and the physical wires of the bus
lines in a controller area network (CAN). They are pri-
marily intended for automotive systems requiring data
rates up to 2Mbps and feature 卤80V fault protection
against short circuits in high-voltage power buses. They
provide differential transmit capability to the bus and
differential receive capability to the CAN controller.
The MAX3050/MAX3057 have four modes of operation:
high speed, slope control, standby, and shutdown.
High-speed mode allows data rates up to 2Mbps. In
slope-control mode, data rates are 40kbps to 500kbps,
so the effects of EMI are reduced, and unshielded
twisted or parallel cable can be used. In standby mode,
the transmitters are shut off and the receivers are put
into low-current mode. In shutdown mode, the transmit-
ter and receiver are switched off.
The MAX3050 has an AutoShutdown鈩?function that
puts the device into a 15碌A shutdown mode when the
bus or CAN controller is inactive for 4ms or longer.
The MAX3050/MAX3057 are available in an 8-pin SO
package and are specified for operation from -40掳C to
+125掳C.
Features
o
卤80V Fault Protection for 42V Systems
o
Four Operating Modes
High-Speed Operation Up to 2Mbps
Slope-Control Mode to Reduce EMI
(40kbps to 500kbps)
Standby Mode
Low-Current Shutdown Mode
o
AutoShutdown when Device Is Inactive
(MAX3050)
o
Automatic Wake-Up from Shutdown (MAX3050)
o
Thermal Shutdown
o
Current Limiting
o
Fully Compatible with the ISO 11898 Standard*
*
Pending completion of testing.
MAX3050/MAX3057
Ordering Information
PART
MAX3050ASA
MAX3057ASA
TEMP RANGE
-40掳C to +125掳C
-40掳C to +125掳C
PIN-PACKAGE
8 SO
8 SO
Pin Configuration
TOP VIEW
TXD
1
GND
V
CC
2
3
8
7
RS
CANH
CANL
SHDN
Applications
Automotive Systems
HVAC Controls
Telecom 72V systems
MAX3050
MAX3057
6
5
RXD
4
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SO
Typical Operating Circuit
V
CC
120鈩?/div>
0.1碌F
CAN
CONTROLLER
V
CC
CANH
TX0
RX0
30pF
GND
24k鈩?TO 180k鈩?/div>
MAX3050
MAX3057
CANL
TXD
RXD
SHDN
RS
GND
(100nF)
120鈩?/div>
( ) ARE FOR 3050 ONLY.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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