MAXIM MAX3057ASA

19-2670; Rev 0; 10/02
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
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.
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*
* Pending completion of testing.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3050ASA
-40°C to +125°C
8 SO
MAX3057ASA
-40°C to +125°C
8 SO
Pin Configuration
TOP VIEW
Applications
TXD 1
Automotive Systems
HVAC Controls
GND
Telecom 72V systems
VCC
2
3
MAX3050
MAX3057
RXD 4
8
RS
7
CANH
6
CANL
5
SHDN
SO
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
VCC
120Ω
0.1µF
VCC
CANH
TX0
TXD
MAX3050
MAX3057 CANL
RX0
RXD
CAN
CONTROLLER
(100nF)
SHDN
30pF
RS
GND
24kΩ TO 180kΩ
GND
120Ω
( ) ARE FOR 3050 ONLY.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX3050/MAX3057
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.
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
ABSOLUTE MAXIMUM RATINGS
VCC to GND ............................................................ -0.3V to +6V
TXD, RS, RXD, SHDN to GND ....................-0.3V to (VCC + 0.3V)
CANH, CANL to GND..............................................-80V to +80V
RXD Shorted to GND................................................. Continuous
Continuous Power Dissipation (TA = +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
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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V ±10%, RL = 60Ω, RS = GND, TA = TMIN to TMAX. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
56
72
3.6
5.5
VRS = VCC
125
260
µA
SHDN = GND
15
30
µA
Dominant (Note 1)
Supply Current
IS
Quiescent Current Standby Mode
IQ
Dominant no load
6
Recessive (Note 1)
Recessive no load
Shutdown Supply Current
IQSHDN
UNITS
mA
5.5
Thermal-Shutdown Threshold
160
°C
Thermal-Shutdown Hysteresis
20
°C
TXD INPUT LEVELS
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
High-Level Input Current
IIH
Pullup Resistor
2
V
0.4
VTXD = VCC
RINTXD
V
1
µA
20
kΩ
CANH, CANL TRANSMITTER
Recessive Bus Voltage
Off-State Output Leakage
VCANH,
VCANL
ILO
VTXD = VCC, no load
2
3
-2V < VCANH, VCANL < +7V
SHDN = GND, VTXD = VCC
-2
+1
-80V < VCANH, VCANL < +80V
SHDN = GND, VTXD = VCC
-4
+4
V
mA
CANH Output Voltage
VCANH
VTXD = 0
3.0
VCC
V
CANL Output Voltage
VCANL
VTXD = 0
0
2.0
V
VTXD = 0
1.5
5
VTXD = 0, RL = 45Ω
1.5
VTXD = VCC, no load
-500
-200
Differential Output
(VCANH - VCANL)
∆VCANH,
VCANL
CANH Short-Circuit Current
ISC
VCANH = -5V
CANL Short-Circuit Current
ISC
VCANL = 18V
2
_______________________________________________________________________________________
V
+50
mV
200
mA
mA
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
(VCC = +5V ±10%, RL = 60Ω, RS = GND, TA = TMIN to TMAX. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC BUS RECEIVER (VTXD = VCC; CANH and CANL externally driven; -2V < VCANH, VCANL < +7V, unless otherwise specified)
Differential Input Voltage
(Recessive)
VDIFF
-7V < VCANH, VCANL < +12V
-1.0
+0.5
V
Differential Input Voltage
(Dominant)
VDIFF
-7V < VCANH, VCANL < +12V
0.9
3.3
V
Differential Input Hysteresis
CANH Input Wake-Up Voltage
Threshold
VDIFF(HYST)
VCANH
(SHDN)
RXD High-Level Output Voltage
VOH
RXD Low-Level Output Voltage
VOL
CANH and CANL Input
Resistance
Differential Input Resistance
150
SHDN = GND, VTXD = VCC (MAX3050)
I = -100µA
6
mV
9
0.8 ✕
VCC
V
V
I = 10mA
0.8
I = 5mA
0.4
V
RI
5
25
kΩ
RDIFF
10
100
kΩ
0.3 ✕
VCC
V
MODE SELECTION (RS)
Input Voltage for High Speed
VSLP
Input Voltage for Standby
VSTBY
0.75 ✕
VCC
Slope-Control Mode Voltage
VSLOPE
RRS = 24kΩ to 180kΩ
0.4 ✕
VCC
Slope-Control Mode Current
ISLOPE
RRS = 24kΩ to 180kΩ
Standby Mode
ISTBY
High-Speed Mode Current
IHS
V
0.6 ✕
VCC
V
-200
-10
µA
-10
+10
µA
-500
µA
900
kΩ
VRS = 0
SHUTDOWN
SHDN Input Pullup Resistor
SHDN Input Voltage High
SHDN Input Voltage Low
RINSHDN
MAX3057
500
2
V
0.5
V
_______________________________________________________________________________________
3
MAX3050/MAX3057
DC ELECTRICAL CHARACTERISTICS (continued)
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
TIMING CHARACTERISTICS
(VCC = +5V ±10%, RL = 60Ω, CL = 100pF, TA = TMIN to TMAX. Typical values are at VCC = +5V and TA = +25°C.) (Figures 1, 2, and 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING
VRS = 0 (2Mbps)
Minimum Bit Time
tBIT
2
RRS = 100kΩ (125kbps)
8
RRS = 180kΩ (62.5kbps)
25
Delay TXD to Bus Active
tONTXD
VRS = 0
Delay TXD to Bus Inactive
tOFFTXD
Delay TXD to Receiver Active
Delay TXD to Receiver Inactive
tONRXD
tOFFRXD
0.5
RRS = 24kΩ (500kbps)
40
ns
VRS = 0
75
ns
VRS = 0 (2Mbps)
120
ns
RRS = 24kΩ (500kbps)
0.4
RRS = 100kΩ (125kbps)
1.6
RRS = 180kΩ (62.5kbps)
5.0
VRS = 0 (2Mbps)
130
RRS = 24kΩ (500kbps)
0.45
RRS = 100kΩ (125kbps)
1.6
RRS = 180kΩ (62.5kbps)
5.0
RRS = 24kΩ (500kbps)
Differential Output Slew Rate
SR
Bus Dominant to RXD Low
µs
µs
ns
µs
14
RRS = 100kΩ (125kbps)
7
RRS = 180kΩ (62.5kbps)
1.6
V/µs
Standby mode
10
µs
10
µs
47
ms
Time to Wake Up: CANH > 9V
tWAKE
SHDN = GND, VTXD = VCC (MAX3050)
Time to Sleep Mode when Bus Is
Recessive
tSHDN
CSHDN = 100nF (MAX3050)
10
Note 1: As defined by ISO, bus value is one of two complementary logical values: dominant or recessive. The dominant value represents 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.
4
_______________________________________________________________________________________
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
MAX3050/MAX3057
120Ω
VCC
0.1µF
VCC
CAN
CONTROLLER
CANH
100pF
TX0
MAX3050
MAX3057 CANL
TXD
RX0
RXD
(100nF)
SHDN
30pF
RS
GND
GND
120Ω
24kΩ TO 180kΩ
( ) ARE FOR MAX3050 ONLY.
Figure 1. AC Test Circuit
TXD
9V
CANH
CANH
CANL
DOMINANT
VSHDN = 2V
0.9V
CANH - CANL
0.5V RECESSIVE
VCC/2
RXD
VSHDN
VCC/2
tONTXD
tOFFTXD
tONRXD
tOFFRXD
Figure 2. Timing Diagram for Dynamic Characteristics
tWAKE
Figure 3. Time to Wake Up (tWAKE) (MAX3050)
_______________________________________________________________________________________
5
Typical Operating Characteristics
(VCC = 5V, RL = 60Ω, CL = 100pF, TA = +25°C, unless otherwise specified.)
MAX3057
SLEW RATE vs. RRS
MAX3050
AutoShutdown vs. CSHDN
SLEEP TIME (ms)
15
TA = +25°C
10
TA = -+125°C
5
40
48
86
124
162
200
MAX3050 toc03
29
TA = -40°C
25
100
0
200
300
0
400
400
800
1200
1600
CSHDN (nF)
DATA RATE (kbps)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE, RRS = GND
DRIVER PROPAGATION DELAY
vs. TEMPERATURE, RRS = GND
RECEIVER OUTPUT LOW
vs. OUTPUT CURRENT
45
35
DOMINANT
25
DOMINANT
20
-15
20
55
90
800
TA = +25°C
400
TA = -40°C
15
15
TA = +125°C
1200
25
MAX3050 toc06
MAX3050 toc05
30
RECESSIVE
2000
1600
VOLTAGE RXD (mV)
RECESSIVE
35
DRIVER PROPAGATION DELAY (ns)
MAX3050 toc04
55
0
-40
125
-7
26
59
92
125
0
5
10
15
20
25
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
RECEIVER OUTPUT HIGH
vs. OUTPUT CURRENT
DIFFERENTIAL VOLTAGE
vs. DIFFERENTIAL LOAD RL
SUPPLY CURRENT
vs. TEMPERATURE IN STANDBY MODE
TA = +125°C
1800
1200
TA = +25°C
600
TA = +125°C
2
TA = +25°C
0
15
OUTPUT CURRENT (mA)
20
150
125
100
75
0
10
175
1
TA = -40°C
5
MAX3050 toc09
TA = -40°C
3
SUPPLY CURRENT (µA)
DIFFERENTIAL VOLTAGE (V)
2400
200
MAX3050 toc08
4
MAX3050 toc07
3000
0
TA = +25°C
TA = +125°C
RRS (kΩ)
65
-50
31
27
0
10
RECEIVER PROPAGATION DELAY (ns)
60
20
0
6
33
SUPPLY CURRENT (mA)
80
TA = -40°C
SUPPLY CURRENT vs. DATA RATE
35
MAX3050 toc02
20
SLEW RATE (V/µs)
100
MAX3050 toc01
25
VOLTAGE (VCC - RXD) (mV)
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
25
50
0
50
100
150
200
DIFFERENTIAL LOAD RL (Ω)
250
300
-50
-15
20
55
TEMPERATURE (°C)
_______________________________________________________________________________________
90
125
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
LOOPBACK PROPAGATION DELAY vs. RRS
MAX3050 toc10
LOOPBACK PROPAGATION DELAY (ns)
RECEIVER PROPAGATION DELAY
MAX3050 toc11
1400
1200
CANH - CANL
1000
800
600
RXD
2V/div
400
200
0
0
50
100
150
200
40ns/div
RRS (kΩ)
DRIVER PROPAGATION DELAY
DRIVER PROPAGATION DELAY
MAX3050 toc12
MAX3050 toc13
TXD
5V/div
TXD
2V/div
RRS = 24kΩ
RRS = 100kΩ
RRS = 180kΩ
CANH - CANL
RRS = GND
40ns/div
1µs/div
Pin Description
PIN
NAME
FUNCTION
1
TXD
Transmit Data Input. TXD is a CMOS/TTL-compatible input from a CAN controller.
2
GND
Ground
3
VCC
Supply Voltage. Bypass VCC to GND with a 0.1µF capacitor.
4
RXD
Receive Data Output. RXD is a CMOS/TTL-compatible output from the physical bus lines CANH and CANL.
SHDN
Shutdown Input. Drive SHDN low to put into shutdown mode (MAX3057). Place a capacitor from SHDN to
ground to utilize the AutoShutdown feature of MAX3050. See the Shutdown and AutoShutdown sections for a
full explanation of SHDN behavior.
6
CANL
CAN Bus Line Low. CANL is fault protected to ±80V.
7
CANH
CAN Bus Line High. CANH is fault protected to ±80V.
8
RS
5
Mode Select Pin. Drive RS low or connect to GND for high-speed operation. Connect a resistor from RS to
GND to control output slope. Drive RS high to put into standby mode. See the Mode Selection section.
_______________________________________________________________________________________
7
MAX3050/MAX3057
Typical Operating Characteristics (continued)
(VCC = 5V, RL = 60Ω, CL = 100pF, TA = +25°C, unless otherwise specified.)
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
The transceivers are designed to operate from a single
+5V supply and draw 56mA of supply current in dominant state and 3.6mA in recessive state. In standby
mode, supply current is reduced to 125µA. In shutdown
mode, supply current is 15µA.
CANH and CANL are output short-circuit current limited
and are protected against excessive power dissipation
by thermal-shutdown circuitry that places the driver
outputs into a high-impedance state.
Detailed Description
The MAX3050/MAX3057 interface between the protocol
controller and the physical wires of the bus lines in a
CAN. They are primarily intended for automotive applications requiring data rates up to 2Mbps and feature
±80V fault protection against shorts in high-voltage systems. This fault protection allows the devices to withstand up to ±80V with respect to ground with no
damage to the device. The built-in fault tolerance
allows the device to survive in industrial and automotive
environments with no external protection devices. The
devices provide differential transmit capability to the
bus and differential receive capability to the CAN controller (Figure 4).
The device has four modes of operation: high speed,
slope control, standby, and shutdown. In high-speed
mode, slew rates are not limited, making 2Mbps transmission speeds possible. Slew rates are controlled in slopecontrol mode, minimizing EMI and allowing use of
unshielded twisted or parallel cable. In standby mode,
receivers are active and transmitters are in high impedance. In shutdown mode, transmitters and receivers are
turned off.
Fault Protection
The MAX3050/MAX3057 feature ±80V fault protection.
This extended voltage range of CANH and CANL bus
lines allows use in high-voltage systems and communication with high-voltage buses. If data is transmitting at
2Mbps, the fault protection is reduced to ±70V.
Transmitter
The transmitter converts a single-ended input (TXD)
from the CAN controller to differential outputs for the
bus lines (CANH, CANL). The truth table for the transmitter and receiver is given in Table 1.
VCC
MAX3050
THERMAL
SHUTDOWN
CANH
TRANSMITTER
CONTROL
TXD
RS
CANL
MODE
SELECTION
GND
RXD
RECEIVER
0.75V
WAKE
7.5V
AutoShutdown
SHDN
Figure 4. Functional Diagram
8
_______________________________________________________________________________________
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
TXD
RS
SHDN
CANH
CANL
BUS STATE
RXD
0
VRS < 0.75 ✕ VCC
V S HDN > 1.5V
High
Low
Dominant*
0
1 or float
VRS < 0.75 ✕ VCC
V S HDN > 1.5V
Recessive*
1
X
VRS > 0.75 ✕ VCC
X
Floating
Floating
Floating
1
X
X
V S H D N < 0.5V
Floating
Floating
Floating
1
5kΩ to 25kΩ to VCC/2 5kΩ to 25kΩ to VCC/2
X = Don’t care.
*As defined by ISO, bus value is one of two complementary logical values: dominant or recessive. The dominant value represents the
logical 0 and the recessive represents the logical 1. During the simultaneous transmission of the dominant and recessive bits, the resulting bus value is dominant.
High Speed
Connect RS to ground to set the MAX3050/MAX3057 to
high-speed mode. When operating in high-speed
mode, the MAX3050/MAX3057 can achieve transmission rates of up to 2Mbps. Line drivers are switched on
and off as quickly as possible. However, in this mode,
no measures are taken to limit the rise and fall slope of
the data signal, allowing for potential EMI emissions. If
using the MAX3050/MAX3057 in high-speed mode, use
shielded twisted-pair cable to avoid EMI problems.
Slope Control
Connect a resistor from RS to ground to select slopecontrol mode (Table 2). In slope-control mode, the
gates of the line drivers are charged with a controlled
current, proportional to the resistor connected to the RS
pin. Transmission speed ranges from 40kbps to
500kbps. Controlling the rise and fall slope reduces
EMI and allows the use of an unshielded twisted pair or
a parallel pair of wires as bus lines. The transfer function for selecting the resistor value is given by:
present at the RXD pin. If negative (i.e., ∆V < 0.7V), a
logic high is present.
The receiver always echoes the transmitted data.
The CANH and CANL common-mode range is -7V to
+12V. RXD is logic high when CANH and CANL are
shorted or terminated and undriven. If the differential
receiver input voltage (CANH - CANL) is less than or
equal to 0.5V, RXD is logic high. If (CANH - CANL) is
greater than or equal to 0.9V, RXD is logic low.
Standby
If a logic high level is applied to RS, the MAX3050/
MAX3057 enter a low-current standby mode. In this
mode, the transmitter is switched off and the receiver is
switched to a low-current state. If dominant bits are
detected, RXD switches to a low level. The microcontroller should react to this condition by switching the
transceiver back to normal operation (through RS). Due
to the reduced power mode, the receiver is slower in
standby mode, and the first message may be lost at
higher bit rates.
Thermal Shutdown
RRS (kΩ) = 12000/speed (in kbps)
See the Slew Rate vs. R RS graph in the Typical
Operating Characteristics section.
If the junction temperature exceeds +160°C, the device
is switched off. The hysteresis is approximately 20°C,
disabling thermal shutdown once the temperature
reaches +140°C.
Receiver
Shutdown (MAX3057)
The receiver reads differential input from the bus lines
(CANH, CANL) and transfers this data as a singleended output (RXD) to the CAN controller. It consists of
a comparator that senses the difference ∆V = (CANH CANL) with respect to an internal threshold of 0.7V. If
this difference is positive (i.e., ∆V > 0.7V), a logic low is
Drive SHDN low to enter shutdown mode. In shutdown
mode, the device is switched off. The outputs are high
impedance to ±80V. The MAX3057 features a pullup at
SHDN. If shutdown is forced low and then left floating,
the device switches back to normal operating mode.
Table 2. Mode Selection Truth Table
CONDITION FORCED AT PIN RS
MODE
RESULTING CURRENT AT RS
VRS < 0.3 ✕ VCC
High speed
|IRs| < 500µA
0.4 ✕ VCC< VRS < 0.6 ✕ VCC
Slope control
10µA < |IRs| < 200µA
VRS > 0.75 ✕ VCC
Standby
|IRs| < 10µA
_______________________________________________________________________________________
9
MAX3050/MAX3057
Table 1. Transmitter and Receiver Truth Table
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
AutoShutdown (MAX3050)
To manage power consumption, AutoShutdown puts
the device into shutdown mode after the device has
been inactive for a period of time. The value of an
external capacitor (C SHDN) connected to SHDN determines the threshold of inactivity time, after which the
AutoShutdown triggers. Floating SHDN allows the
MAX3050 to automatically change from active mode to
shutdown.
Use a 100nF capacitor as C SHDN for a typical threshold of 20ms. Change the capacitor value according to
the following equation to change the threshold time
period.
CSHDN(nF) =
0.02 × time(µs)
(VCC − VSHDN )
CANH - CANL
1V/div
FFT
500mV/div
Figure 5. FFT Dominant Bus at 2Mbps
V SHDN is the threshold of SHDN guaranteed to be less
than 2V in the Electrical Characteristics table. Drive
SHDN high to turn the MAX3050 on and disable
AutoShutdown.
CANH - CANL
1V/div
When the MAX3050 is in shutdown mode, only the
wake-up comparator is active, and normal bus communication is ignored. The remote master of the CAN system wakes up the MAX3050 with a signal greater than
9V on CANH. Internal circuitry in the MAX3050 puts the
device in normal operation by driving SHDN high.
FFT
200mV/div
The MAX3057 does not have the AutoShutdown feature.
Driver Output Protection
The MAX3050/MAX3057 have several features that protect them from damage. Thermal shutdown switches off
the device and puts CANH and CANL into high impedance if the junction temperature exceeds +160°C.
Thermal protection is needed particularly when a bus
line is short circuited. The hysteresis for the thermal
shutdown is approximately 20°C.
Additionally, a current-limiting circuit protects the transmitter output stage against short-circuits to positive and
negative battery voltage. Although the power dissipation increases during this fault condition, this feature
prevents destruction of the transmitter output stage.
Figure 6. FFT Recessive Bus at 2Mbps
CANH - CANL
1V/div
FFT
500mV/div
Figure 7. FFT Dominant Bus at 500kbps
10
______________________________________________________________________________________
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
CANH - CANL
1V/div
FFT
200mV/div
FFT
200mV/div
Figure 8. FFT Recessive Bus at 500kbps
Figure 10. FFT Recessive Bus at 62.5kbps
Applications Information
CANH - CANL
1V/div
Reduced EMI and Reflections
In slope-control mode, the CANH and CANL outputs
are slew-rate limited, minimizing EMI and reducing
reflections caused by improperly terminated cables. In
general, a transmitter’s rise time relates directly to the
length of an unterminated stub, which can be driven
with only minor waveform reflections. The following
equation expresses this relationship conservatively:
FFT
500mV/div
Length = tRISE / (15ns/ft)
Figure 9. FFT Dominant Bus at 62.5kbps
where tRISE is the transmitter’s rise time.
The MAX3050 and MAX3057 require no special layout
considerations beyond common practices. Bypass VCC
to GND with a 0.1µF ceramic capacitor mounted close
to the IC with short lead lengths and wide trace widths.
Chip Information
TRANSISTOR COUNT: 1214
PROCESS: BiCMOS
______________________________________________________________________________________
11
MAX3050/MAX3057
CANH - CANL
1V/div
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX3050/MAX3057
±80V Fault-Protected, 2Mbps, Low Supply
Current CAN Transceivers
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
C
A
B
e
0 -8
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.