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MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
General Description
Benefits and Features
The
MAX33011E–MAX33012E,
and
MAX33014E–MAX33015E are a family of +5V control
area network (CAN) transceivers with integrated protection for industrial applications. These devices have extended ±65V fault protection on the CAN bus for equipment where overvoltage protection is required. The CAN
family also incorporates high ±45kV ESD HBM protection
and an input common-mode range (CMR) of ±25V, exceeding the ISO11898 specification of -2V to +7V, and
well suited for applications where ground planes from different systems are shifting relative to each other.
● Integrated Protection Increases Robustness
• ±65V Fault-Tolerant CANH and CANL
• ±45kV ESD HBM (Human Body Model)
• ±30kV IEC Air-Gap and ±12kV IEC Contact
• ±25V Extended Common-Mode Input Range (CMR)
• Transmitter Dominant Timeout Prevents Lockup
• Short-Circuit Protection Limits Driver Current
• Thermal Shutdown
This CAN family incorporates a fault-detection feature
where it monitors the CANH and CANL line for faults like
overcurrent, overvoltage, and transmission failure. When
a fault is detected, the FAULT pin goes high, which triggers an external interrupt with the local CAN controller,
and the driver and receiver lines are placed in recessive
mode. The system clock then drives the TXD pin and a
fault code is transmitted through the RXD line back to
the controller. When the specific fault code is transmitted and the system is programmed to alert local service
personnel, they are able to troubleshoot and debug the
problem quicker, providing valuable diagnostics and decreased equipment downtime. In addition, the family features a variety of options to address common CAN application requirements: low-current standby mode, slow slew
rate for improved EMI performance, silent-mode to disable
the transmitter, low level translation to interface with lowvoltage controllers, and loopback mode for remote self diagnostics.
These devices are specified for data rates up to 5Mbps.
The transceivers include a dominant timeout to prevent
bus lockup caused by controller error or by a fault on the
TXD input. When TXD remains in the dominant state (low)
for longer than tDOM, the driver is switched to the recessive state, releasing the bus.
The MAX33011E and MAX33012E are in a standard 8-pin
SOIC package and the MAX33014E and MAX33015E are
in a 10-pin TDFN-EP package. This family of devices operates over the -40°C to +125°C temperature range.
Applications
●
●
●
●
●
Industrial Automation
Building Automation
Vending Machines
Security Systems
Heavy Equipment/Machinery
19-100701; Rev 1; 6/20
● Family Provides Flexible Design Options
• 1.62V to 5.5V Logic-Supply (VL) Range
(MAX33014E and MAX33015E)
• Silent Mode S Disables Transmitter (MAX33011E
and MAX33015E)
• STBY Input for Low-Current, Slow Slew Rate, and
Normal Mode (MAX33012E and MAX33014E)
• LPBK Enables Remote Diagnostics (MAX33014E
and MAX33015E)
● Fault Detection and Reporting
• Detects Overcurrent, Overvoltage, and
Transmission Failure
• Error Code Reporting Through RXD
● Operating Temperature Range of -40°C to +125°C
Ordering Information appears at end of data sheet.
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Simplified Block Diagram
VDD
VL
THERMAL
SHUTDOWN
PROTECTION
TXD
LPBK
LEVEL SHIFTER
STBY/S
DOMINANT
TIMEOUT
RXD
www.maximintegrated.com
FAULT REPORT
PROTECTION
DRIVER
WAKE-UP
MODE
CONTROL
CANH
CANL
FAULT
FAULT
DETECTION
DRIVER
MUX
WAKE-UP
FILTER
19-100701
GND
Maxim Integrated | 2
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Absolute Maximum Ratings
VDD........................................................................... -0.3V to +6V
CANH or CANL (Continuous) .................................. -65V to +65V
TXD, RXD, STBY, S, LPBK, FAULT ........................ -0.3V to +6V
VL MAX33014E/15E................................... -0.3V to (VDD + 0.5V)
Short-Circuit Duration ................................................. Continuous
Continuous Power Dissipation
8 SO Single-Layer Board (TA = +70°C, derate 5.9mW/°C
above +70°C.)............................................................ 470.6mW
8 SO Multilayer Board (TA = +70°C, derate 7.6mW/°C above
+70°C.)....................................................................... 606.1mW
10 TDFN Single-Layer Board (TA = +70°C, derate 18.5mW/°C
above +70°C.) ..........................................................1481.5mW
10 TDFN Multilayer Board (TA = +70°C, derate 24.4mW/°C
above +70°C.) ..........................................................1951.2mW
Operating Temperature Range ...........................-40°C to +125°C
Junction Temperature ....................................................... +150°C
Storage Temperature Range ..............................-60°C to +150°C
Soldering Temperature (reflow) ........................................ +260°C
Lead Temperature (soldering, 10sec)............................... +300°C
Note 1: All voltages are referenced to GND, unless otherwise noted.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JEDSD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
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.
Package Information
8 SOIC
Package Code
S8+4
Outline Number
21-0041
Land Pattern Number
90-0096
Thermal Resistance, Single-Layer Board:
Junction to Ambient (θJA)
170°C/W
Junction to Case (θJC)
40°C/W
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θJA)
132°C/W
Junction to Case (θJC)
38°C/W
10 TDFN
Package Code
T1034N+1
Outline Number
21-0268
Land Pattern Number
90-0247
Thermal Resistance, Single-Layer Board:
Junction to Ambient (θJA)
54°C/W
Junction to Case (θJC)
9°C/W
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θJA)
41°C/W
Junction to Case (θJC)
9°C/W
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates
RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal
considerations, refer to www.maximintegrated.com/thermal-tutorial.
www.maximintegrated.com
19-100701
Maxim Integrated | 3
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Electrical Characteristics
(VDD = 4.5V to 5.5V, VL = 1.62V to VDD, RL = 60Ω, CL = 15pF, TA = TMIN to TMAX, unless otherwise specified. Typical values are at
VDD = 5V, VL = 3.3V (MAX33014E–MAX33015E), and TA = +25°C, unless otherwise specified. (Note 1), Limits are 100% tested at TA =
+25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization.
Specifications marked "GBD" are guaranteed by design and not production tested.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4.5
5.5
V
1.62
VDD
V
POWER
Supply Voltage
Logic Supply Voltage
VDD
VL
MAX33014E–MAX33015E
Dominant Supply
Current
IDD_DOM
TXD = 0V
Recessive Supply
Current
IDD_REC
VDD = 5V, TXD =
VL
Standby Supply Current
ISTBY
No load
5
8
RL = 60Ω
50
70
No load
4
CANH shorted to
CANL
4
mA
mA
STBY = VL, no external pullup resistor on
FAULT pin
60
μA
2.5
mA
Silent Mode Supply
Current
IS
S = VL
Logic Supply Current
IL
RXD = open
UVLO Threshold Rising
VUVLO_R
VDD rising
UVLO Threshold Falling
VUVLO_F
VDD falling
VL = 5V
60
VL = 3.3V
40
VL = 1.8V
22
μA
4.25
3.45
V
V
PROTECTION
ESD CANH and CANL
ESD Other Pins
Fault Protection Range
ESDALL
VFP
HBM
JEDEC JS-001,
Note 3
±45
Air Gap
ISO 10605, IEC
61000-4-2
±30
Contact
ISO 10605, IEC
61000-4-2
±12
HBM
JEDEC JS-001,
Note 3
±4
CANH or CANL to GND
-65
kV
kV
+65
V
Thermal Shutdown
TSHDN
+160
°C
Thermal Shutdown
Hysteresis
THYST
+20
°C
LOGIC INTERFACE (RXD, TXD, LPBK)
Input High Voltage
VIH
0.7 x VL
V
2.25V ≤ VL ≤ 5.5V
0.8
1.62V ≤ VL ≤ 2.25V
0.6
Input Low Voltage
VIL
TXD Input Pullup
Resistance
RPU_TXD
100
250
kΩ
RPU_S
100
250
kΩ
STBY, S Input Pullup
Resistance/LPBK
Pulldown Resistance
www.maximintegrated.com
19-100701
V
Maxim Integrated | 4
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Electrical Characteristics (continued)
(VDD = 4.5V to 5.5V, VL = 1.62V to VDD, RL = 60Ω, CL = 15pF, TA = TMIN to TMAX, unless otherwise specified. Typical values are at
VDD = 5V, VL = 3.3V (MAX33014E–MAX33015E), and TA = +25°C, unless otherwise specified. (Note 1), Limits are 100% tested at TA =
+25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization.
Specifications marked "GBD" are guaranteed by design and not production tested.)
PARAMETER
SYMBOL
CONDITIONS
Output High Voltage
(RXD)
VOH
Sourcing 4mA
Output Low Voltage
(RXD)
VOL
Sinking 4mA
MIN
TYP
MAX
VL - 0.4
UNITS
V
0.4
V
CAN BUS DRIVER
Bus Output Voltage
(Dominant)
VO_DOM
t < tDOM, TXD =
0V, RL = 60Ω
Bus Output Voltage
(Recessive)
VO_REC
TXD = VL, no load
Bus Output Differential
Voltage (Dominant)
VOD_DOM
CANH
2.75
4.5
CANL
0.5
2.25
2
3
3
V
V
TXD = 0V, RL =
60Ω
-5V ≤ VCM ≤ 10V,
RCM = 156Ω,
Figure 1
1.5
TXD = 0V, RL = 60
Ω
RCM = open
1.5
3
RL = 60Ω
-120
+12
No load
-500
+50
No load
70
160
mV
V
Bus Output Differential
Voltage (Recessive)
VOD_REC
TXD = VL
Bus Output Voltage
Standby
VO_STBY
TXD = STBY = VL
High-Side Short-Circuit
Current
ISC_CANH
TXD = CANH = 0V
175
250
mA
Low-Side Short-Circuit
Current
ISC_CANL
TXD = 0V, CANL = VDD
175
250
mA
mV
RECEIVER
Common-Mode Input
Range
VCM
CANH or CANL to GND, RXD output
valid
-25
+25
V
Common-Mode Input
Range Standby Mode
VCM_STBY
CANH or CANL to GND, RXD output
valid
-12
+12
V
0.9
V
Input Differential
Threshold Voltage
(Dominant)
VID_DOM
-25V ≤ VCM ≤ +25V, TXD = VL
Input Differential
Threshold Voltage
(Recessive)
VID_REC
-25V ≤ VCM ≤ +25V, TXD = VL
Standby Input
Differential Threshold
Voltage (Dominant)
VID_SDOM
-12V ≤ VCM ≤ +12V, TXD = VL
Standby Input
Differential Threshold
Voltage (Recessive)
VID_SREC
-12V ≤ VCM ≤ +12V, TXD = VL
Input Differential
Hysteresis
www.maximintegrated.com
VID_HYS
-25V ≤ VCM ≤ +25V
19-100701
0.5
V
1.15
0.45
V
V
100
mV
Maxim Integrated | 5
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Electrical Characteristics (continued)
(VDD = 4.5V to 5.5V, VL = 1.62V to VDD, RL = 60Ω, CL = 15pF, TA = TMIN to TMAX, unless otherwise specified. Typical values are at
VDD = 5V, VL = 3.3V (MAX33014E–MAX33015E), and TA = +25°C, unless otherwise specified. (Note 1), Limits are 100% tested at TA =
+25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization.
Specifications marked "GBD" are guaranteed by design and not production tested.)
MAX
UNITS
Input Resistance
PARAMETER
RIN
TXD = VL
10
50
kΩ
Differential Input
Resistance
RIN_DIFF
TXD = VL
20
100
kΩ
Input Capacitance
Differential Input
Capacitance
Input Leakage Current
SYMBOL
CONDITIONS
MIN
TYP
CIN
TXD = VL (Note 2)
22
39
pF
CIN_DIFF
TXD = VL (Note 2)
12
22
pF
150
280
μA
ILKG
CANH = CANL =
VDD
VDD = VL = 0V
SWITCHING
Data Rate
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
5
Mbps
Driver Rise Time
tR
RL = 60Ω, CLD= 100pF, RCM is open,
Figure 1
10
ns
Driver Fall Time
tF
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
14
ns
Slow Slew Driver Rise
Time
tSSR
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
160
ns
Slow Slew Driver Fall
Time
tSSF
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
130
ns
TXD to RXD Loop Delay
tLOOP
RL = 60Ω, Dominant to Recessive and
Recessive to Dominant, Figure 2
60
100
ns
TXD Propagation Delay
(Recessive to Dominant)
tONTXD
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
30
50
ns
TXD Propagation Delay
(Dominant to Recessive)
tOFFTXD
RL = 60Ω, CLD = 100pF, RCM is open,
Figure 1
25
50
ns
RXD Propagation Delay
(Recessive to Dominant)
tONRXD
CL = 15pF, Figure 3
25
70
ns
RXD Propagation Delay
(Dominant to Recessive)
tOFFRXD
CL = 15pF, Figure 3
30
70
ns
4.3
ms
TXD-Dominant TimeOut
tDOM
Figure 4
Wake-Up Time
tWAKE
Figure 5
Fault Interrupt on Delay
(Overcurrent,
Overvoltage,
Transmission Failure)
Loopback Delay from
Transmitter Input to
Receiver Output
Standby to Normal
Mode Delay
www.maximintegrated.com
tFAULT_LH
tLPBK
1.3
2.2
100kΩ pullup
resistor to VDD,
2.5MHz signal on
TXD, Figure 6
Overcurrent and
overvoltage
4
Transmission
Failure
8
MAX33014E/MAX33015E
tSTBY_NORM
19-100701
μs
μs
10
ns
20
µs
Maxim Integrated | 6
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Electrical Characteristics (continued)
(VDD = 4.5V to 5.5V, VL = 1.62V to VDD, RL = 60Ω, CL = 15pF, TA = TMIN to TMAX, unless otherwise specified. Typical values are at
VDD = 5V, VL = 3.3V (MAX33014E–MAX33015E), and TA = +25°C, unless otherwise specified. (Note 1), Limits are 100% tested at TA =
+25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization.
Specifications marked "GBD" are guaranteed by design and not production tested.)
PARAMETER
Normal to Standby
Mode Delay
Standby Propagation
Delay
SYMBOL
CONDITIONS
MIN
tNORM_STBY
tPLH_STBY
CL = 15pF, Figure 5
TYP
MAX
UNITS
40
μs
300
ns
Note 1: All units are 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: Not production tested. Guaranteed at TA = +25°C.
Note 3: Tested at the limits of test equipment.
RCM
RL
CLD
VDIFF
RCM
VCM
VL
TXD
50%
50%
0V
tONTXD
tOFFTXD
VDIFF
0.9V
90%
10%
tR
0.5V
tF
Figure 1. Transmitter Test Circuit and Timing Diagram
www.maximintegrated.com
19-100701
Maxim Integrated | 7
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
CANH
TXD
RL
CLD
CANL
RXD
CL
VL
50%
TXD
0V
tLOOP2
VL
50%
RXD
0V
tLOOP1
Figure 2. TXD to RXD Loop Delay
CANH
RXD
+
VID
-
CL
CANL
VL
0.9V
VID
0.5V
0V
tONRXD
RXD
tOFFRXD
50%
50%
VOH
VOL
Figure 3. RXD Timing Diagram
www.maximintegrated.com
19-100701
Maxim Integrated | 8
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
TRANSMITTER
ENABLED
tDOM
VL
TXD
0V
TRANSMITTER
DISABLED
VCANH - VCANL
Figure 4. Transmitting Dominant Timeout Timing Diagram
VL
CANH
STBY
RXD
RL
CL
CLD
CANL
tWAKE
tPLH_STBY
VL
RXD
0V
VCANH - VCANL
Figure 5. Standby Receiver Propagation Delay
www.maximintegrated.com
19-100701
Maxim Integrated | 9
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
tFAULT_LH
5V/div
5V/div
FAULT 90%
OF VDD
2V/div
2µs/div
Figure 6. FAULT Propagation Delay from Low to High
www.maximintegrated.com
19-100701
Maxim Integrated | 10
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Typical Operating Characteristics
(VDD = 5V, VL = 3.3V, RL = 60Ω, CL = 15pF, TA = +25°C, unless otherwise noted.)
www.maximintegrated.com
19-100701
Maxim Integrated | 11
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Typical Operating Characteristics (continued)
(VDD = 5V, VL = 3.3V, RL = 60Ω, CL = 15pF, TA = +25°C, unless otherwise noted.)
NORMAL MODE WITH
STBY GROUNDED
www.maximintegrated.com
19-100701
SLEW RATE WITH
26.1k
26.1kΩ
Ω RESISTOR TO GND
ON STBY
Maxim Integrated | 12
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Pin Configurations
MAX33011E
TOP VIEW
TXD
1
GND
+
8
S
2
7
CANH
VDD
3
6
CANL
RXD
4
5
FAULT
8
STBY
SOIC
MAX33012E
TOP VIEW
+
TXD
1
GND
2
7
CANH
VDD
3
6
CANL
RXD
4
5
FAULT
SOIC
www.maximintegrated.com
19-100701
Maxim Integrated | 13
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
MAX33014E
TOP VIEW
1
10
STBY
LPBK
2
9
CANH
GND
3
8
CANL
VDD
4
7
VL
RXD
5
6
FAULT
+
TXD
TDFN-EP
3mm x 4mm
MAX33015E
TOP VIEW
1
10
S
LPBK
2
9
CANH
GND
3
8
CANL
VDD
4
7
VL
RXD
5
6
FAULT
+
TXD
TDFN-EP
3mm x 4mm
Pin Description
PIN
MAX33011E
MAX33012E
MAX33014E
MAX33015E
1
1
1
1
NAME
FUNCTION
TXD
Transmit Data Input. TXD is a CMOS/TTL
compatible input from a CAN controller with an
internal pullup to VDD.
—
—
2
2
LPBK
Loopback Mode. When connected to logic-high,
the transmitter and receiver are placed in a highimpedance state. Internally, the TXD line drives
directly to the RXD line for loopback that can be
used for self-diagnostic of the transceiver without
disturbing the bus. When loopback mode is not
used, connect to GND or leave floating.
2
2
3
3
GND
Ground
3
3
4
4
VDD
Supply Voltage. Bypass VDD to GND with a
0.1µF capacitor.
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19-100701
Maxim Integrated | 14
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Pin Description (continued)
PIN
NAME
FUNCTION
MAX33011E
MAX33012E
MAX33014E
MAX33015E
4
4
5
5
RXD
5
5
6
6
FAULT
Fault Detected Indication. Stays low when fault is
not detected. Release to high if an overcurrent,
overvoltage, or transmission failure is detected.
VL
Logic Supply Input. VL is the logic supply voltage
for the input/output between the CAN transceiver
and controller. VL allows full compatibility from
+1.62V to +5.5V logic on all digital lines. Bypass
to GND with a 0.1µF capacitor. Connect VL to
VDD for 5V logic compatibility.
Receive Data Output. RXD is a CMOS/TTL
compatible output from the physical bus lines
CANH and CANL.
—
—
7
7
6
6
8
8
CANL
CAN Bus Line Low
7
7
9
9
CANH
CAN Bus Line High
8
—
—
8
www.maximintegrated.com
—
10
10
—
S
Silent Mode Input. Drive S low to enable TXD and
to operate in normal mode. Drive S high to
disable the transmitter. A 26.1kΩ external resistor
can be used to connect the S pin to ground for
slow slew mode.
STBY
Standby Mode Input. A logic-high on STBY pin
selects the standby mode. In standby mode, the
transmitter is disabled, and the receiver is in lowpower mode. A logic-low on STBY pin puts the
transceiver in normal operating mode. A 26.1kΩ
external resistor can be used to connect the
STBY pin to ground for slow slew mode.
19-100701
Maxim Integrated | 15
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Detailed Description
The MAX33011E–MAX33012E and MAX33014E–MAX33015E are a family of fault-protected CAN transceivers with
fault detection and fault reporting. They are designed for applications where expeditious troubleshooting is important
to increase the up time of important control systems, addressing common faults like overcurrent, overvoltage, and
transmission failure. These devices are ideal for harsh industrial applications with a number of integrated robust
protection feature set that improve the reliability of end equipment. These devices provide a link between the CAN
protocol controller and the physical wires of the bus lines in a CAN. They can be used for DeviceNet™, CAN Kingdom,
and CANOpen™ applications as well.
All CAN transceivers in the family are fault protected up to ±65V, making them suitable for applications where overvoltage
protection is required. These devices are rated up to a high ±45kV ESD of human body model (HBM), suitable for
protection during the manufacturing process, and even in the field where there is a human interface for installation
and maintenance. In addition, a common-mode voltage range of ±25V enables communication in noisy environments
where there are ground plane differences between different systems due to the close proximity of heavy equipment
machinery or operation from different transformers. Dominant timeout prevents the bus from being blocked by a hung-up
microcontroller, and the outputs CANH and CANL are short-circuit current-limited and protected against excessive power
dissipation by thermal shutdown circuitry that places the driver outputs in a high-impedance state.
The MAX33011E–MAX33012E and MAX33014E–MAX33015E can operate up to 5Mbps. This family has the option to
slow the slew rate to 8V/μs to minimize EMI, enabling the use of unshielded-twisted or parallel cable. The MAX33011E
and MAX33012E are packaged in an industry-standard 8-pin SO, while the MAX33014E and MAX33015E are packaged
in a 10-pin TDFN. This family of robust CAN transceivers has an operating temperature from -40°C to +125°C.
±65V Fault Protection
These devices feature ±65V of fault protection. The CANH and CANL data lines are capable of withstanding a short
from -65V to +65V. This extended overvoltage range makes it suitable for applications where accidental shorts to power
supply lines are possible due to human intervention.
Transmitter
The transmitter converts a single-ended input signal (TXD) from the local CAN controller to differential outputs for the bus
lines CANH and CANL. The truth table for the transmitter and receiver is provided in Table 1.
Table 1. Transmitter and Receiver Truth Table (When Not Connected to the Bus)
STBY
TXD
TXD LOW
TIME
CANH
CANL
BUS STATE
RXD
LOW
LOW
< tDOM
HIGH
LOW
DOMINANT
LOW
LOW
LOW
> tDOM
VDD/2
VDD/2
RECESSIVE
HIGH
LOW
HIGH
X
VDD/2
VDD/2
RECESSIVE
HIGH
X = Don't care
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19-100701
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MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Transmitter Output Protection
This family of CAN transceivers protects the transmitter output stage against a short-circuit to a positive or negative
voltage by limiting the driver current. See the CANH and CANL short-circuit current TOC graphs. Thermal shutdown
further protects the devices from excessive temperatures that may result from a short. The transmitter returns to normal
operation once the short is removed.
Transmitter-Dominant Timeout
These devices feature a transmitter-dominant timeout (tDOM) that prevents erroneous CAN controllers from clamping the
bus to a dominant level by maintaining a continuous low TXD signal. When TXD remains in the dominant state (low)
for greater than tDOM, the transmitter is disabled, releasing the bus to a recessive state (Figure 4). After a dominant
timeout fault, the transmitter is re-enabled when receiving a rising edge at TXD. The transmitter-dominant timeout limits
the minimum possible data rate to 9kbps for standard CAN protocol.
Receiver
The receiver reads the differential input from the bus line CANH and CANL and transfers this data as a single-ended
output RXD to the CAN controller. It consists of a comparator that senses the difference VDIFF = (CANH-CANL), with
respect to an internal threshold of 0.7V. If VDIFF > 0.9V, a logic-low is present on RXD. If VDIFF < 0.5V, a logic-high
is present. The CANH and CANL common-mode range is ±25V in normal mode and ±12V in standby mode. RXD is a
logic-high when CANH and CANL are shorted or terminated and undriven.
Fault Detection and Reporting
This family of devices has fault detection for overcurrent, overvoltage, and transmission failure in normal mode operation.
The detection of faults and reporting them out to the local CAN controller provide additional information that benefits the
troubleshooting of a given problem in a CAN bus system, reducing down time, improving equipment efficiencies, and
keeping service costs down.
To enable fault detection upon power-up, 100 low-to-high transitions need to pass through TXD, which is typically 1 or
2 CAN frame messages depending on data payload size (classic or extended format) and which protocol is used. Fault
detection is not enabled in standby and silent mode. After the 100 low-to-high transitions on TXD, if a fault is detected,
then another 16 low-to-high transitions on TXD are required to shift out the fault code shown in Table 2. In addition, 10
more pulses are needed to clear the fault.
Table 2. Fault Detection and Reporting
FAULT
CONDITION (FAULT DETECTION ENABLED)
FAULT
CODE
>85mA
101010
Overcurrent
POSSIBLE CAUSE
● CANH shorted to CANL
● CANH connected to GND and CANL
connected to VDD
Overvoltage
CANH > +29V or CANL < -29V
101100
● CMR fault
Transmission
Failure
RXD unchanged for 10 consecutive pulses,
recommended minimum frequency = 200kHz
110010
● Open load (both termination resistors
missing) on CANH and CANL
● Exceeds driver’s common-mode range
● CANH and/or CANL connected to a fixed
voltage source
Overvoltage Detection
Overvoltage detection is triggered when CANH is above approximately +29V or CANL is below approximately -29V. This
indicates that the CAN bus has likely violated the CMR range or that a short fault on CANH and/or CANL has occurred
and is beyond the ±29V threshold. Once overvoltage detection is triggered, the FAULT pin transitions from low to high
and the fault code is clocked out of RXD through TXD.
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19-100701
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MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Overcurrent Detection
Overcurrent detection is triggered when there is a high current path from VDD to GND through a short from CANH to
CANL. In addition, shorts far away from the CAN node may not be detected due to high cable impedance. See Figure
7 for overcurrent detection maximum operating frequency versus cable length as a reference. A Cat5e copper-clad
aluminum cable is used. The maximum frequency will vary with the type of cable.
CABLE LENGTH vs. MAXIMUM SHORT
DETECTION FREQUENCY
FREQUENCY [MHz]
3
2.5
2
1.5
1
0.5
0
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CABLE LENGTH [m]
Figure 7. Overcurrent Detection Operating Frequency vs. Cable Length
Transmission Failure Detection
Transmission failure detection is triggered when the signal on RXD does not match TXD for 10 consecutive cycles after
fault detection is enabled. This can occur when both termination resistors are missing. Other scenarios include, but are
not limited to, shorting CANH to GND or CANL to VDD resulting in the differential signal not meeting the receiver’s VIH
and VIL specification.
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19-100701
Maxim Integrated | 18
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Fault Reporting
When a fault occurs and the FAULT pin goes high, the CANH and CANL lines are placed in high impedance, and a 6-bit
fault code of the first detected fault condition is stored in an internal register. 16 low-to-high transitions need to go through
TXD to shift the fault code out through RXD.
An overcurrent fault timing diagram is shown in Figure 8.
10 PULSES
6 PULSES
10 PULSES
RXD
TXD
FAULT
Figure 8. Overcurrent Fault Reporting Timing Diagram
Fault Clear
The fault condition can be cleared only after the 6-bit fault code is reported through the RXD pin of the chip. Soon after
the fault code is reported, send 10 clock pulses through the TXD pin, which will clear the fault condition, and de-asserts
the FAULT pin. Fault detection is disabled after fault is cleared and another 100 low-to-high transitions are required on
TXD to re-enable fault detection.
Standby Mode (MAX33012E, MAX33014E)
Drive the STBY pin high for standby mode, which switches the transmitter off and the receiver to a low current and lowspeed state. The supply current is reduced to 60μA during standby mode. The bus line is monitored by a low differential
comparator to detect and recognize a wakeup event on the bus line. Once the comparator detects a dominant bus level
longer than tWAKE, RXD is pulled low. Drive the STBY pin low for normal operation. Fault detection is disabled in standby
mode.
Slow Slew Rate Mode
Connect a 26.1kΩ resistor between ground and the STBY/S pin. This will put the device in slow slew rate mode where the
typical rising slew rate is 10V/s and the typical falling slew rate is 18V/s, enabling the use of unshielded-twisted or parallel
cable, compared with normal mode at 140V/μs falling and 180V/μs rising slew rate. The STBY pin voltage should be
between 0.2V to 0.6V to remain in slow slew rate mode. Slow slew rate mode is recommended for transmitter frequencies
which have a data rate that is less than 1Mbps.
Silent Mode (MAX33011E, MAX33015E)
Drive S high to place the device in silent mode. This disables the transmitter regardless of the voltage level at TXD.
However, RXD is still active and monitors activity on the bus line. Make sure that the FAULT pin is cleared before entering
into silent mode.
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19-100701
Maxim Integrated | 19
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Loopback Mode (MAX33014E, MAX33015E)
Drive LPBK high disables the transceiver (while keeping the CANH/CANL in recessive state); data is passed from TXD
to RXD and enables the local CAN controller to perform self diagnostic routines without disturbing the bus. When LPBK
is connected to ground, the transceiver operates in normal mode.
Logic Compatibility (MAX33014E, MAX33015E)
A separate input VL allows the devices to communicate with logic systems down to 1.62V while operating from a +5V
supply. This provides a reduced input voltage threshold to the TXD, STBY, S, and LPBK inputs, and provides a logic-high
output at RXD that is compatible with the microcontroller's supply rail. The logic compatibility eliminates an external logic
level translator and longer propagation delay. Connect VL to VDD to operate with +5V logic systems.
For parts without the VL pin, the logic supply pin is VDD and all VL references can be substituted with VDD.
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19-100701
Maxim Integrated | 20
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Applications Information
Reduced EMI and Reflections
In multidrop CAN applications, it is important to maintain a single linear bus of uniform impedance that is properly
terminated at each end. A star, ring, or tree configuration should never be used. Any deviation from the end-to-end wiring
scheme creates a stub. High-speed data edges on a stub can create reflections back down to the bus. These reflections
can cause data errors by eroding the noise margin of the system. Although stubs are unavoidable in a multidrop system,
care should be taken to keep these stubs as short as possible, especially when operating with high data rates.
Typical Application Circuit
Multidrop CAN Bus
1.8V
5V
60Ω
60Ω
60Ω
60Ω
0.1µF
47nF
0.1µF
MICROCONTROLLER
VL
RX
GPIO
GPIO
TXD
GPIO
47nF
VDD
RXD
TRANSCEIVER 4
FAULT
LPBK
TXD
S/STBY
MAX33011E/12E/14E/15E
TRANSCEIVER 2
TRANSCEIVER 3
Ordering Information
PART NUMBER
TEMP RANGE
PIN-PACKAGE
FEATURE SET
MAX33011EASA+
-40°C to +125°C
8 SO
S
MAX33012EASA+
-40°C to +125°C
8 SO
STBY
MAX33014EATB+*
-40°C to +125°C
10 TDFN
STBY, LPBK, VL
MAX33015EATB+*
-40°C to +125°C
10 TDFN
S, LPBK, VL
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* Future product—contact factory for availability.
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19-100701
Maxim Integrated | 21
MAX33011E/12E/14E/15E
+5V, 5Mbps CAN Transceiver with ±65V Fault
Protection, Fault Detection and Reporting, ±25V
CMR, and ±45kV ESD Protection
Revision History
REVISION
NUMBER
REVISION
DATE
0
1
DESCRIPTION
PAGES
CHANGED
12/19
Initial release
6/20
Updated to include MAX33011EASA+ information in the Electrical Characteristics table, Pin
Description, Detailed Description, and Ordering Information table
4, 15, 16,
19, 21
—
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max
limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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