MAXIM MAX3050, MAX3057 Technical data
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 primarily intended for automotive systems requiring data
rates up to 2Mbps and feature ±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 transmitter and receiver are switched off.
The MAX3050 has an AutoShutdown™ function that
puts the device into a 15µA 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°C to
+125°C.
Applications
Automotive Systems
HVAC Controls
Telecom 72V systems
Features
♦ ±80V Fault Protection for 42V Systems
♦ Four Operating Modes
High-Speed Operation Up to 2Mbps
Slope-Control Mode to Reduce EMI
(40kbps to 500kbps)
Standby Mode
Low-Current Shutdown Mode
♦ AutoShutdown when Device Is Inactive
(MAX3050)
♦ Automatic Wake-Up from Shutdown (MAX3050)
♦ Thermal Shutdown
♦ Current Limiting
♦ Fully Compatible with the ISO 11898 Standard*
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX3050
MAX3057
CAN
CONTROLLER
TXD
V
CC
RXD
RS
GND
CANH
CANL
V
CC
(100nF)
120Ω
120Ω
TX0
RX0
GND
0.1µF
30pF
24kΩ TO 180kΩ
SHDN
( ) ARE FOR 3050 ONLY.
Typical Operating Circuit
19-2670; Rev 0; 10/02
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.
Pin Configuration
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
* Pending completion of testing.
PART TEMP RANGE PIN-PACKAGE
MAX3050ASA -40°C to +125°C 8 SO
MAX3057ASA -40°C to +125°C 8 SO
TOP VIEW
TXD
V
RXD
1
2
MAX3050
MAX3057
3
CC
4
SO
87RS
6
5
CANHGND
CANL
SHDN
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +5V ±10%, RL= 60Ω, RS = GND, TA= T
MIN
to T
MAX
. Typical values are at VCC= +5V and TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCCto GND ............................................................ -0.3V to +6V
TXD, RS, RXD, SHDN to GND ....................-0.3V to (V
CC
+ 0.3V)
CANH, CANL to GND..............................................-80V to +80V
RXD Shorted to GND................................................. Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) .................470mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Supply Current I
Quiescent Current Standby Mode I
Shutdown Supply Current I
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
S
Q
QSHDN
Thermal-Shutdown Threshold 160 °C
Thermal-Shutdown Hysteresis 20 °C
TXD INPUT LEVELS
High-Level Input Voltage V
Low-Level Input Voltage V
High-Level Input Current I
Pullup Resistor R
IH
IL
IH
INTXD
CANH, CANL TRANSMITTER
V
Recessive Bus Voltage
Off-State Output Leakage I
CANH Output Voltage V
CANL Output Voltage V
Differential Output
(V
CANH
- V
CANL
)
CANH Short-Circuit Current I
CANL Short-Circuit Current I
CANH,
V
CANL
LO
CANHVTXD
CANL
∆V
CANH
V
CANL
SC
SC
Dominant (Note 1) 56 72
Dominant no load 6
Recessive (Note 1) 3.6 5.5
Recessive no load 5.5
V
= V
RS
CC
SHDN = GND 15 30 µA
V
= V
TXD
CC
V
= VCC, no load 2 3 V
TXD
-2V < V
CANH
SHDN = GND, V
-80V < V
CANH
SHDN = GND, V
= 0 3.0 V
V
= 0 0 2.0 V
TXD
V
= 0 1.5 5
TXD
,
V
= 0, RL = 45Ω 1.5
TXD
V
= VCC, no load -500 +50 mV
TXD
V
= -5V -200 mA
CANH
V
= 18V 200 mA
CANL
125 260 µA
2V
0.4 V
1µA
20 kΩ
, V
< +7V
CANL
, V
TXD
CANL
TXD
= V
< +80V
= V
CC
CC
-2 +1
-4 +4
CC
mA
mA
V
V
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= +5V ±10%, RL= 60Ω, RS = GND, TA= T
MIN
to T
MAX
. Typical values are at VCC= +5V and TA= +25°C.)
)
DC BUS RECEIVER (V
Differential Input Voltage
(Recessive)
Differential Input Voltage
(Dominant)
Differential Input Hysteresis V
CANH Input Wake-Up Voltage
Threshold
RXD High-Level Output Voltage V
RXD Low-Level Output Voltage V
CANH and CANL Input
Resistance
Differential Input Resistance R
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
= VCC; CANH and CANL externally driven; -2V < V
TXD
V
DIFF
V
DIFF
DIFF(HYST
V
CANH
(SHDN)
OH
OL
R
I
DIFF
-7V < V
-7V < V
SHDN = GND, V
, V
CANH
CANH
< +12V -1.0 +0.5 V
CANL
, V
< +12V 0.9 3.3 V
CANL
= V
TXD
I = -100µA
I = 10mA 0.8
I = 5mA 0.4
, V
CANH
< +7V, unless otherwise specified)
CANL
150 mV
(MAX3050) 6 9 V
CC
0.8
✕
V
CC
525kΩ
10 100 kΩ
V
V
MODE SELECTION (RS)
Input Voltage for High Speed V
Input Voltage for Standby V
Slope-Control Mode Voltage V
Slope-Control Mode Current I
Standby Mode I
High-Speed Mode Current I
SLP
STBY
SLOPERRS
SLOPE
STBY
HS
RRS = 24kΩ to 180kΩ -200 -10 µA
V
0.75 ✕
V
CC
0.4
= 24kΩ to 180kΩ
✕
V
CC
-10 +10 µA
= 0 -500 µA
RS
0.3 ✕
V
CC
0.6 ✕
V
CC
V
V
V
SHUTDOWN
SHDN Input Pullup Resistor R
INSHDN
MAX3057 500 900 kΩ
SHDN Input Voltage High 2V
SHDN Input Voltage Low 0.5 V
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
4 _______________________________________________________________________________________
Note 1: As defined by ISO, bus value is one of two complementary logical values: dominant or recessive. The dominant value repre-
sents the logical 1 and the recessive represents the logical 0. During the simultaneous transmission of the dominant and
recessive bits, the resulting bus value is dominant. For MAX3050 and MAX3057 values, see the truth table in the
Transmitter and Receiver sections.
TIMING CHARACTERISTICS
(VCC= +5V ±10%, RL= 60Ω, CL= 100pF, TA= T
MIN
to T
MAX
. Typical values are at VCC= +5V and TA= +25°C.) (Figures 1, 2, and 3)
TIMING
Minimum Bit Time t
Delay TXD to Bus Active t
Delay TXD to Bus Inactive t
Delay TXD to Receiver Active t
Delay TXD to Receiver Inactive t
Bus Dominant to RXD Low Standby mode 10 µs
Time to Wake Up: CANH > 9V t
Time to Sleep Mode when Bus Is
Recessive
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
BIT
ONTXDVRS
OFFTXDVRS
ONRXD
OFFRXD
WAKE
t
SHDN
V
RS
RRS = 24kΩ (500kbps) 2
RRS = 100kΩ (125kbps) 8
RRS = 180kΩ (62.5kbps) 25
V
RS
RRS = 24kΩ (500kbps) 0.4
RRS = 100kΩ (125kbps) 1.6
RRS = 180kΩ (62.5kbps) 5.0
V
RS
RRS = 24kΩ (500kbps) 0.45
RRS = 100kΩ (125kbps) 1.6
RRS = 180kΩ (62.5kbps) 5.0
RRS = 24kΩ (500kbps) 14
RRS = 100kΩ (125kbps) 7Differential Output Slew Rate SR
R
RS
SHDN = GND, V
C
SHDN
= 0 (2Mbps) 0.5
= 0 40 ns
= 0 75 ns
= 0 (2Mbps) 120 ns
= 0 (2Mbps) 130 ns
= 180kΩ (62.5kbps) 1.6
= V
TXD
= 100nF (MAX3050) 10 47 ms
(MAX3050) 10 µs
CC
µs
µs
µs
V/µs
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