Click here to ask about the production status of specific part numbers.
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN
Transceivers
General Description
Benefits and Features
The MAX14878–MAX14880 family of high-speed transceivers improve communication and safety by integrating
galvanic isolation between the CAN protocol controller
side of the device and the physical wires of the network
(CAN) bus. Isolation improves communication by breaking
ground loops and reduces noise where there are large
differences in ground potential between ports. The
MAX14879 provides up to 2750VRMS (60s) of galvanic
isolation, while the MAX14878/MAX14880 provide up to
5000VRMS (60s) of galvanic isolation in 8-pin and 16-pin
SOIC packages.
● Integrated Protection for Robust Communication
• 2.75kVRMS, 3.5kVRMS, or 5kVRMS Withstand
Isolation Voltage for 60s (Galvanic Isolation)
• ±25V Receiver Input Common-Mode Range
• ±54V Fault Protection on Receiver Inputs
All transceivers operate up to the maximum high-speed
CAN data rate of 1Mbps. The MAX14879/MAX14880 feature an integrated standby input (STB) on the isolated side
of the transceiver to disable the driver and place the transceiver in a low-power standby mode. The MAX14878 does
not include the standby input.
The MAX14878–MAX14880 transceivers feature integrated protection for robust communication. The receiver input
common-mode range is ±25V, exceeding the ISO 11898
specification of -2V to +7V, and are fault tolerant up to
±54V. Driver outputs/receiver inputs are also protected
from ±15kV electrostatic discharge (ESD) to GNDB on the
bus side, as specified by the Human Body Model (HBM).
Interfacing with CAN protocol controllers is simplified by
the wide 1.71V to 5.5V supply voltage range (VDDA) on
the controller side of the device. This supply voltage sets
the interface logic levels between the transceiver and controller. The supply voltage range for the CAN bus side of
the device is 4.5V to 5.5V (VDDB).
The MAX14878–MAX14880 are available in a wide-body
16-pin SOIC package with 8mm of creepage and clearance. The MAX14878 is also available in 8-pin wide-body
SOIC packages with 5mm (MAX14878) and 8mm
(MAX14878W) creepage. All devices operate over the
-40°C to +125°C temperature range.
Applications
●
●
●
●
Industrial Controls
HVAC
Building Automation
Switching Gear
19-100067; Rev 7; 9/20
● High-Performance Transceiver Enables Flexible
Designs
• Wide 1.71V to 5.5V Supply for the CAN Controller
Interface
• Available 16-pin and 8-pin SOIC Package Pin
Configurations
• Data Rates up to 1Mbps (Max)
• Dominant Timeout Protection
Safety Regulatory Approvals
● UL According to UL1577 (Basic Insulation) (16-Pin
Package Devices Only)
Ordering Information appears at end of data sheet.
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Simplified Block Diagram
VDDA
VDDB
VDDA
ISOLATION BOUNDARY
RXD
TXD
RXD
CANH
TXD
STB
ISOLATION BOUNDARY
MAX14879
MAX14880
MAX14878
VDDB
CANH
CANL
GNDA
www.maximintegrated.com
GNDB
CANL
GNDA
GNDB
Maxim Integrated | 2
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Absolute Maximum Ratings
VDDA to GNDA ......................................................... -0.3V to +6V
VDDB to GNDB ......................................................... -0.3V to +6V
TXD to GNDA ........................................................... -0.3V to +6V
RXD to GNDA........................................... -0.3V to (VDDA + 0.3V)
STB to GNDB ........................................................... -0.3V to +6V
I.C. to GNDB............................................. -0.3V to (VDDB + 0.3V)
CANH or CANL to GNDB, (Continuous) ................. -54V to +54V
Short-Circuit Duration (CANH to CANL)..................... Continuous
Short-Circuit Duration (RXD to GNDA or VDDA) ........ Continuous
Continuous Power Dissipation (TA = +70ºC)
16-pin W SOIC (derate 14.1mW/°C above +70°C) ..1126.8mW
8-pin W SOIC
W8MS+1 (derate 9.39mW/°C above +70°C) ........751.17mW
W8MS+5 (derate 11.35mW/°C above +70°C) ......908.06mW
Operating Temperature Range ............................. -40ºC to 125ºC
Junction Temperature ....................................................... +150ºC
Storage Temperature Range .............................. -60ºC to +150ºC
Lead Temperature (soldering, 10s)................................... +300ºC
Soldering Temperature (reflow) ........................................ +260ºC
NOTE: See the Isolation section of the Electrical Characteristics table for maximum voltage from GNDA to GNDB
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
Wide 16-SOIC
Package Code
W16M+9
Outline Number
21-0042
Land Pattern Number
90-0107
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction-to-Ambient (θJA)
71°C/W
Junction-to-Case Thermal Resistance (θJC)
23°C/W
Wide 8-SOIC
Package Code
W8MS+1
Outline Number
21-0262
Land Pattern Number
90-0258
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction-to-Ambient (θJA)
106.5°C/W
Junction-to-Case Thermal Resistance (θJC)
46.67°C/W
Wide 8-SOIC
Package Code
W8MS+5
Outline Number
21-100415
Land Pattern Number
90-100146
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction-to-Ambient (θJA)
88.1°C/W
Junction-to-Case Thermal Resistance (θJC)
42.4°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
www.maximintegrated.com
Maxim Integrated | 3
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/
thermal-tutorial.
Electrical Characteristics
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V. (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER
Protocol Controller Side
(A-Side) Voltage Supply
VDDA
1.71
5.5
V
CAN Bus Side (B-Side)
Voltage Supply
VDDB
4.5
5.5
V
VDDA Supply Current
IDDA
VDDB Supply Current
IDDB
VDDA Undervoltage
Lockout Threshold,
Rising
VDDAUVLO_R
VDDA UndervoltageLockout Threshold,
Falling
VDDAUVLO_F
VDDB UndervoltageLockout Threshold,
Rising
VDDBUVLO_R
VDDB UndervoltageLockout Threshold,
Falling
VDDBUVLO_F
VDDA = 5V
0.34
0.83
VDDA = 3.3V
0.34
0.76
VDDA = 1.8V
0.33
0.64
VDDB = 5V, TXD = GNDA,
RL = open
4.3
7.3
VDDB = 5V, TXD = GNDA, RL = 60Ω
47.6
67.3
VDDB = 5V, TXD = VDDA, RL = 60Ω
3.2
VDDB = 5V, CANH shorted to CANL,
TXD = VDDA
3.2
VDDB = 5V, CANH shorted to CANL,
TXD = GNDA
94
140
VDDB = 5V, TXD = VDDA, RL = 60Ω,
STB = VDDB (MAX14879/MAX14880)
0.4
0.8
mA
1.66
1.3
mA
1.55
V
V
4.25
3.45
V
V
CANH, CANL TRANSMITTER
Dominant Output
Voltage
www.maximintegrated.com
VO(DOM)
VTXD = 0V,
RL = 50Ω to 65Ω
CANH
2.75
4.5
CANL
0.5
2.25
V
Maxim Integrated | 4
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Electrical Characteristics (continued)
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V. (Notes 1, 2)
PARAMETER
Dominant Differential
Bus Output Voltage
Recessive Voltage
Output
Short-Circuit Current
SYMBOL
VOD
VOR
ISHORT
CONDITIONS
MIN
TYP
MAX
(VCANH - VCANL),
VTXD = 0V,
RL = 50Ω to
65Ω, Figure 1
RCM is open
1.5
3
(VCANH - VCANL),
VTXD = 0V,
RL = 50Ω to
65Ω, Figure 2
RCM = 1.25kΩ,
-17V < VCM <
+17V
1.5
3
(VCANH - VCANL),
VTXD = 0V,
RL = 50Ω to
65Ω, Figure 3
RCM = 1.25kΩ,
-25V < VCM <
+25V
1.1
3
CANH
2
3
CANL
2
3
CANH shorted to
GNDB
50
75
100
CANL shorted to
VDDB
50
75
100
VTXD = VDDA,
No load
VTXD = 0V
-500
+50
RL = 60Ω
-120
+12
70
175
Normal operation
-25
+25
Standby mode
(MAX14879/
MAX14880 only)
-12
+12
Recessive
0.5
VODR
(VCANH - VCANL),
VTXD = VDDA
CANH/CANL Output
Voltage in Standby
Mode
VSTB
MAX14879/MAX14880 only,
VTXD = VDDA, No load, STB = VDDB
V
V
mA
RL is open
Recessive Differential
Bus Output Voltage
UNITS
mV
mV
DC BUS RECEIVER (CANH and CANL externally driven)
Common Mode Input
Range
VCM
CANH or CANL to
GNDB, RXD
output valid
Differential Input Voltage
VDIFF
VTXD = VDDA
Differential Input
Hysteresis
Dominant, No load
0.9
VDIFF(HYST)
125
MAX14879/
MAX14880 only,
VTXD = VDDA,
VSTB = VDDB
Standby Mode
Differential Input Voltage
Recessive
V
V
mV
0.45
Dominant
1.15
V
Common-Mode Input
Resistance
RIN
VTXD = VDDA, RIN = ΔV/∆I,
∆V = +300mV, VSTB = GNDB
(MAX14879/MAX14880)
10
50
kΩ
Differential Input
Resistance
RID
VTXD = VDDA, RIN = ∆V/∆I,
∆V = +300mV, VSTB = GNDB
(MAX14879/MAX14880)
20
100
kΩ
Input Leakage Current
ILKG
VDDB = 0V, VCANH = VCANL = 5V
310
μA
Input Capacitance
CIN
CANH or CANL to GNDB (Note 3)
20
pF
www.maximintegrated.com
14.4
Maxim Integrated | 5
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Electrical Characteristics (continued)
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V. (Notes 1, 2)
PARAMETER
Differential Input
Capacitance
SYMBOL
CIND
CONDITIONS
MIN
CANH to CANL (Note 3)
TYP
MAX
UNITS
7.2
10
pF
LOGIC INTERFACE (RXD, TXD, STB)
Input High Voltage
Input Low Voltage
VIH
VIL
TXD
1.71V ≤ VDDA <
2.25V
0.75 x
VDDA
2.25V ≤ VDDA ≤
5.5V
0.7 x
VDDA
STB (MAX14879/
MAX14880 only)
0.7 x
VDDB
V
TXD, 1.71 ≤ VDDA < 2.25V
0.7
TXD, 2.25V ≤ VDDA ≤ 5.5V
0.8
STB (MAX14879/MAX14880 only)
0.8
VDDA 0.4
Output High Voltage
VOH
RXD, ISOURCE = 4mA
Output Low Voltage
VOL
RXD, ISINK = 4mA
Input Pullup Current
IPU
TXD
-10
Input Pulldown
Resistance
RPD
STB (MAX14879/MAX14880 only)
75
Input Capacitance
V
V
-5
0.4
V
-1.5
μA
250
kΩ
5
pF
PROTECTION
Fault Protection Range
CANH to GNDB, CANL to GNDB
ESD Protection
(CANH and CANL to
GNDB)
IEC 61000-4-2 Air-Gap Discharge
-54
+54
V
±10
IEC 61000-4-2 Contact Discharge
±5
Human Body Model
±15
IEC 61000-4-2 Contact Discharge
±3
IEC 61000-4-2 Air Gap Discharge, 330pF
capacitor connected between GNDA and
GNDB
±10
ESD Protection (All
Other Pins)
Human body model
±2
kV
Thermal Shutdown
Threshold
Temperature rising
+160
°C
13
°C
ESD Protection
(CANH and CANL to
GNDA)
Thermal Shutdown
Hysteresis
kV
kV
Electrical Characteristics - Switching
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.)
PARAMETER
Differential Driver
Output Rise Time
www.maximintegrated.com
SYMBOL
tR
CONDITIONS
RL = 60Ω, CL = 100pF, RCM is
open, Figure 1
MIN
TYP
MAX
UNITS
20
ns
Maxim Integrated | 6
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Electrical Characteristics - Switching (continued)
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.)
PARAMETER
Differential Driver
Output Fall Time
TXD to RXD Loop Delay
SYMBOL
MAX
UNITS
RL = 60Ω, CL = 100pF, RCM is
open, Figure 1
33
ns
RL = 60Ω, CL= 100pF,
CRXD = 15pF, Dominant to recessive and
recessive to dominant. Figure 2
210
ns
tPDTXD_RD
RL = 60Ω,
CL = 100pF,
RCM open,
Figure 1
Recessive to
Dominant
95
tPDTXD_DR
RL = 60Ω,
CL = 100pF,
RCM open,
Figure 2
Dominant to
Recessive
95
tPDRXD_RD
CL = 15pF,
Figure 3
Recessive to
Dominant
115
tPDRXD_DR
CL = 15pF,
Figure 4
Dominant to
Recessive
115
tF
tLOOP
TXD Propagation Delay
RXD Propagation Delay
TXD Dominant Timeout
tDOM
Undervoltage Detection
Time to Normal
Operation
tUV(VDDA),
tUV(VDDB)
Wake-up Time to
Dominant State
tWAKE
MIN
tEN
Normal to Standby
Dominant Mode Delay
TYP
ns
(Note 4)
ns
1.4
4.8
ms
230
μs
5
μs
500
ns
MAX14879/MAX14880 only
40
μs
MAX14879/MAX14880 only,
(VCANH - VCANL) > 1.2V
65
μs
110
MAX14879/MAX14880 only, In
standby mode (VSTB = VDDB), Figure 4
0.5
MAX14879/MAX14880 only, RXD,
Dominant to recessive, VSTB = VDDB,
CL = 15pF
Standby Propagation
Delay
Standby to Normal
Mode Delay
CONDITIONS
285
Electrical Characteristics–Package Insulation and Safety Related Specifications: W
16-SOIC
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
>1012
Ω
2
pF
Insulation Resistance
RIO
TA = 25°C, VIO = 500V
Barrier Capacitance
CIO
GNDA to GNDB
Minimum Creepage
Distance
CPG
8
mm
Minimum Clearance
Distance
CLR
8
mm
0.015
mm
Internal Clearance
www.maximintegrated.com
Distance through insulation
Maxim Integrated | 7
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Electrical Characteristics–Package Insulation and Safety Related Specifications: W
16-SOIC (continued)
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.) (Note 5)
PARAMETER
Comparative Tracking
Index
SYMBOL
CONDITIONS
MIN
CTI
TYP
MAX
UNITS
550
Electrical Characteristics–Package Insulation and Safety Related Specifications: W
8-SOIC
(VDDA - VGNDA = 1.71V to 5.5V, VDDB - VGNDB = 1.71V to 5.5V, CL = 15pF, TA = -40°C to +125°C, unless otherwise noted. Typical
values are at VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, GNDA = GNDB, TA = 25°C, unless otherwise noted.) (Notes 2,3)
PARAMETER
SYMBOL
CONDITIONS
Insulation Resistance
RIO
TA = 25°C, VIO = 500V
Barrier Capacitance
CIO
GNDA to GNDB
Minimum Creepage
Distance
CPG
Minimum Clearance
Distance
CLR
Internal Clearance
Comparative Tracking
Index
MIN
MAX14878
TYP
MAX
> 1012
Ω
2
pF
5.5
MAX14878W
mm
8
MAX14878
5.5
MAX14878W
mm
8
Distance through insulation
0.015
CTI
UNITS
mm
>400
Electrical Characteristics–Insulation Characteristics (As Defined by VDE 0884-10): W
16-SOIC
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.) (Note 5)
PARAMETER
Partial Discharge
SYMBOL
VPR
Maximum Repetitive
Peak Voltage
VIORM
Maximum Working
Voltage
VIOWM
Maximum Transient
Overvoltage
VIOTM
Isolation Voltage
www.maximintegrated.com
VISO
CONDITIONS
Method B1 =
VIORM x 1.875
(t = 1s, partial
discharge < 5pC)
MIN
TYP
MAX14879
1182
MAX14878/
MAX14880
2250
MAX14879
630
MAX14878/MAX14880
1200
GNDA to GNDB
continuous
MAX14879
445
MAX14878/
MAX14880
848
MAX14879
4600
MAX14878/MAX14880
8400
GNDA to GNDB for
60s
MAX14879
2.75
MAX14878/
MAX14880
5
MAX
UNITS
VP
VP
VRMS
VP
kVRMS
Maxim Integrated | 8
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Electrical Characteristics–Insulation Characteristics (As Defined by VDE 0884-10): W
16-SOIC (continued)
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.) (Note 5)
PARAMETER
Maximum Surge
Isolation Voltage
Barrier Resistance
SYMBOL
VIOSM
RS
CONDITIONS
MIN
IEC 61000-4-5, Basic insulation
TA = +150°C, VIO = 500V
TYP
MAX
UNITS
10
kV
>109
Ω
40/125/
21
Climate Category
Pollution Degree
DIN VDE 0110, Table 1
2
Electrical Characteristics–Insulation Characteristics: W 8-SOIC
(VDDA = 1.71V to 5.5V, VDDB = 4.5V to 5.5V, TA = -40°C to +125°C, STB or I.C. = GNDB. Typical values are at TA = +25°C with GNDA
= GNDB, VDDA = 3.3V, VDDB = 5V, STB = GNDB.) (Note 5)
PARAMETER
SYMBOL
Maximum Repetitive
Peak Voltage
VIORM
Maximum Working
Voltage
VIOWM
Maximum Transient
Overvoltage
VIOTM
Isolation Voltage
VISO
Maximum Surge
Isolation Voltage
VIOSM
Barrier Resistance
RS
CONDITIONS
MIN
TYP
MAX14878
630
MAX14878W
1200
GNDA to GNDB
continuous
MAX14878
445
MAX14878W
848
MAX14878
5000
MAX14878W
8400
GNDA to GNDB for
60s
MAX14878
MAX14878W
IEC 61000-4-5, Basic insulation
TA = +150°C, VIO = 500V
3.5
5
MAX
UNITS
VP
VRMS
VP
kVRMS
10
kV
>109
Ω
Climate Category
40/125/
21
Pollution Degree
2
Note 1: All devices 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: All currents into the device are positive. All currents out of the device are negative. All voltages referenced to their respective
ground (GNDA or GNDB), unless otherwise noted.
Note 3: Not production tested. Guaranteed at TA = +25°C.
Note 4: The dominant timeout feature releases the bus when TX is held low longer than tDO. CAN protocol guarantees a maximum
of 11 successive dominant bits in any transmission. The minimum data rate allowed by the dominant timeout, then, is 11/
tDO(min).
Note 5: All 16-pin package devices are 100% production tested for high voltage conditions (this does not apply to the 8-pin
MAX14878AWA).
www.maximintegrated.com
Maxim Integrated | 9
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
CANH
TXD
RL
RCM
CL
+
VOD
-
VCM
RCM
CANL
GNDB
tRISE/FALL< 3ns for TXD
50%
TXD
VDDA
50%
GNDA
tPDTXD_RD
tPDTXD_DR
0.9V
VOD
0.5V
Figure 1. Transmitter Test Circuit and Timing Diagram
CANH
TXD
+
VI
-
tRISE/FALL< 3ns for TXD
RL
VDDA
50%
TXD
CLD
GNDA
tLOOP2
CANL
VDDA
GNDA
RXD
RXD
CL
50%
GNDA
tLOOP1
tLOOP= tLOOP1 ~ tLOOP2
Figure 2. TXD to RXD Loop Delay
(CANH-CANL) RISE/FALL TIME < 3ns
CANH
RXD
+
VO
-
CL
CANL
GDNB
GNDA
1.5V
+I
VID
-
0.9V
0.5V
0V
tPDRXD_RD
VDDA
VID
tPDRXD_DR
50%
50%
RXD
GNDA
Figure 3. Receiver Timing Diagram
www.maximintegrated.com
Maxim Integrated | 10
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
VDDB
STB
RL
CL
≥ VDIFF
CANH-CANL
CANH
RXD
CLD
CANL
RXD
tWAKE
Figure 4. MAX14879/MAX14880 STB to RXD Delay
www.maximintegrated.com
Maxim Integrated | 11
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Typical Operating Characteristics
(VDDA = 3.3V, VDDB = 5V, 60Ω load between CANH and CANL, TA = +25°C, unless otherwise noted.)
www.maximintegrated.com
Maxim Integrated | 12
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Typical Operating Characteristics (continued)
(VDDA = 3.3V, VDDB = 5V, 60Ω load between CANH and CANL, TA = +25°C, unless otherwise noted.)
Pin Configurations
TOP VIEW
VDDA
1
16
GNDA
2
15 GNDB
RXD
3
N.C.
4
13 CANH
N.C.
5
12 CANL
TXD
6
11 I.C.
N.C.
7
10 I.C.
GNDA
8
9
MAX14878
VDDB
14 I.C.
GNDB
W SOIC
TOP VIEW
VDDA
1
16 VDDB
GNDA
2
TXD
3
N.C.
4
13 CANH
RXD
5
12 CANL
N.C.
6
11 I.C.
N.C.
7
10 I.C.
GNDA
8
9 GNDB
MAX14879
MAX14880
15 GNDB
14 STB
W SOIC
www.maximintegrated.com
Maxim Integrated | 13
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
TOP VIEW
RXD
1
TXD
2
VDDA
GNDA
+
8
VDDB
7
CANH
3
6
CANL
4
5
GNDB
MAX14878
W SOIC
Pin Description
PIN
MAX14878
16-PIN
MAX14878
8-PIN
MAX14879,
MAX14880
NAME
FUNCTION
REF
SUPPLY
TYPE
VDDA
Power
CONTROLLER SIDE (A-SIDE)
1
3
1
VDDA
Power Supply Input for the
Controller Side/A-Side. Bypass
VDDA to GNDA with 0.1μF
capacitor as close to the device
as possible.
2, 8
4
2, 8
GNDA
Controller Side/A-Side Ground
VDDA
Ground
VDDA
Digital Output
3
1
5
RXD
Receiver Output. RXD is high
when the bus is in the recessive
state. RXD is low when the bus is
in the dominant state.
4, 5, 7
-
4, 6, 7
N.C.
No Connection. Not internally
connected. Connect to GNDA,
VDDA, or leave unconnected.
3
TXD
Transmit Data Input. CANH and
CANL are in the dominant state
when TXD is low. CANH and
CANL are in the recessive state
when TXD is high.
VDDA
Digital Input
CAN Bus Side/B-Side Ground
VDDB
Ground
6
2
CAN BUS SIDE (B-SIDE)
9, 15
5
9, 15
GNDB
10, 14
-
10
I.C.
Internally Connected. Connect to
GNDB or leave unconnected.
11
-
11
I.C
Internally Connected. Connect to
GNDB, VDDB, or leave
unconnected.
12
6
12
CANL
Low-Level CAN Differential Bus
Line
VDDB
Differential
I/O
13
7
13
CANH
High-Level CAN Differential Bus
Line
VDDB
Differential
I/O
www.maximintegrated.com
Maxim Integrated | 14
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Pin Description (continued)
PIN
MAX14878
16-PIN
-
16
MAX14878
8-PIN
-
8
www.maximintegrated.com
MAX14879,
MAX14880
14
16
NAME
FUNCTION
REF
SUPPLY
TYPE
STB
Standby Input, Active High. Drive
STB high to disable the CAN bus
driver and place the transceiver
in low-power standby mode.
Drive STB low for normal
operation.
VDDB
Digital Input
VDDB
Power Supply Input for the CAN
Bus Side/B-Side. Bypass VDDB
to GNDB with a 0.1μF capacitor
as close to the device as
possible.
VDDB
Power
Maxim Integrated | 15
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Detailed Description
The MAX14878–MAX14880 isolated controller area network (CAN) transceivers provide 2750VRMS or 5000VRMS (60s)
of galvanic isolation between the cable side (B-side) of the transceiver and the controller side (A-side). These devices
allow up to 1Mbps communication across an isolation barrier when a large potential exists between grounds on each side
of the barrier.
CANH and CANL outputs are short-circuit current limited and are protected against excessive power dissipation by
thermal shutdown circuitry that places the driver outputs in a high-impedance state.
Isolation
Data isolation is achieved using integrated capacitive isolation that allows data transmission between the controller side
and cable side of the transceiver.
Fault Protection
The MAX14878–MAX14880 feature ±54V fault protection on the CANH and CANL bus lines. When CANH or CANL is
pulled above +30V (typ) or below -30V (typ), the I/O is set to high impedance. This wide fault protection range simplifies
selecting external TVS components for surge protection.
Transmitter
The transmitter converts a single-ended input signal (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.
Transmitter Dominant Timeout
The MAX14878–MAX14880 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 (Table 1).
After a dominant timeout fault, normal transmitter function is re-enabled on the rising edge of a TXD.
The transmitter-dominant timeout limits the minimum possible data rate to 9kbps for standard CAN protocol.
Driver Output Protection
The MAX14878–MAX14880 feature integrated circuitry to protect the transmitter output stage against a short-circuit to a
positive or negative voltage by limiting the driver current. The transmitter returns to normal operation once the short is
removed.
Thermal shutdown further protects the transceiver from excessive temperatures that may result from a short by setting
the transmitter outputs to high impedance when the junction temperature exceeds +160°C (typ). The transmitter returns
to normal operation when the junction temperature falls below the thermal shutdown hysteresis.
Receiver
The receiver reads the differential input from the bus (CANH, CANL) and transfers this data as a single-ended output
(RXD) to the CAN controller. During normal operation, a comparator senses the difference between CANH and CANL,
VDIFF = (VCANH - VCANL), with respect to an internal threshold of 0.7V (typ). 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. RXD is logic-high when CANH and CANL are shorted or terminated
and undriven.
www.maximintegrated.com
Maxim Integrated | 16
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Thermal Shutdown
If the junction temperature exceeds +160°C (typ), the device is switched off. During thermal shutdown, CANH and CANL
are high-impedance and all IC functions are disabled. The transmitter outputs are re-enabled and the device resumes
normal operation when the junction temperature drops below 147°C (typ).
Table 1. Transmitter and Receiver Truth Table When Not Connected to the Bus
TXD
TXD LOW TIME
CANH
CANL
BUS STATE
RXD
LOW
< tDOM
HIGH
LOW
DOMINANT
LOW
LOW
> tDOM
VDDB/2
VDDB/2
RECESSIVE
HIGH
HIGH
X
VDDB/2
VDDB/2
RECESSIVE
HIGH
www.maximintegrated.com
Maxim Integrated | 17
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
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 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 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 Operating Circuit
5V_ISO
ISOLATION BOUNDARY
RXD
TXD
5V_ISO
CANH
CANH
2
MAX
MAX14878
14878
3
CANL
1
MAX
MAX14878
14878
3
3.3V
6
www.maximintegrated.com
TXD
4
5V_ISO
ISOLATION BOUNDARY
RXD
RXD
CANL
2
TXD
3.3V
ISOLATION BOUNDARY
3.3V
CANH
MAX
MAX14878
14878
CANL
5
Maxim Integrated | 18
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Ordering Information
PART NUMBER
ISOLATION VOLTAGE (kVRMS)
STANDBY
OPERATING TEMPERATURE
PACKAGE
MAX14878AWA+
3.5
NO
-40°C to +125°C
W 8-SOIC
MAX14878AWA+T
3.5
NO
-40°C to +125°C
W 8-SOIC
MAX14878AWE+
5
NO
-40°C to +125°C
W 16-SOIC
MAX14878AWE+T
5
NO
-40°C to +125°C
W 16-SOIC
MAX14878WAWA+
5
NO
-40°C to +125°C
W 8-SOIC
MAX14878WAWA+T
5
NO
-40°C to +125°C
W 8-SOIC
MAX14879AWE+
2.75
YES
-40°C to +125°C
W 16-SOIC
MAX14879AWE+T
2.75
YES
-40°C to +125°C
W 16-SOIC
MAX14880AWE+
5
YES
-40°C to +125°C
W 16-SOIC
MAX14880AWE+T
5
YES
-40°C to +125°C
W 16-SOIC
www.maximintegrated.com
Maxim Integrated | 19
MAX14878–MAX14880
2.75kV, 3.5kV, and 5kV Isolated CAN Transceivers
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0
1
6/17
Initial release
8/17
Updated parameters in Electrical Characteristics table and added Typical Operating Circuit
7, 14
2
10/17
Corrected the Pin Description section for internally connected pins; updated Figure 2
9, 12
3
3/18
Updated the Safety Regulatory Approvals section
1
4
6/18
Updated Pin Description table
12
5
6
7
3/19
5/19
09/20
—
Updated the General Description, Benefits and Features, Package Information, Electrical
Characteristics, Pin Configuration, and Pin Description to add a Wide 8-Pin SOIC package;
added MAX14878AWA+ and MAX14878AWA+T to the Ordering Information table
Updated the General Description, Benefits and Features, Safety Regulatory Approvals,
Electrical Characteristics–Package Insulation and Safety Related Specifications: W 8-SOIC,
Electrical Characteristics–Insulation Characteristics (As Defined by VDE 0884-10): W
16-SOIC, Electrical Characteristics–Insulation Characteristics: W 8-SOIC, and Ordering
Information sections
Updated the General Description, Absolute Maximum Ratings, Package Information,
Electrical Characteristics–Package Insulation and Safety Related Specifications: W 8-SOIC,
Electrical Characteristics–Insulation Characteristics: W 8-SOIC, and Ordering Information
sections
1, 3, 8,
12, 14
1–16
1, 3, 8-9,
19
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.
© 2020 Maxim Integrated Products, Inc.
工商网监
湘ICP备2023018690号
