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MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
General Description
The MAX14934–MAX14936 are a family of four-channel,
5kVRMS digital isolators utilizing Maxim’s proprietary
process technology. For applications requiring 2.75kVRMS
of isolation, see the MAX14930–MAX14932. The
MAX14934–MAX14936 family transfers digital signals
between circuits with different power domains at ambient
temperatures up to +125°C.
The MAX14934–MAX14936 family offers all three
possible unidirectional channel configurations to accommodate
any four-channel design, including SPI, RS-232, RS-485,
and large digital IO modules. For applications
requiring bidirectional channels, such as I2C, refer to the
MAX14937.
Devices are available with data rates from DC up to
1Mbps, 25Mbps, or 150Mbps. Each device is also available
in either a default high or default low configuration. The
default is the state an output goes to when its input is
unpowered. See the Product Selector Guide and Ordering
Information for the suffixes associated with each option.
Independent 1.71V to 5.5V supplies on each side of the
isolator also make the devices suitable for use as level
translators.
The MAX14934–MAX14936 are available in a 16-pin
wide body (10.3mm x 7.5mm) SOIC package. All devices
are rated for operation at ambient temperatures of -40°C
to +125°C.
Product Selector Guide and Ordering Information appear at
end of data sheet.
Benefits and Features
●● Robust Galvanic Isolation of Digital Signals
• Withstands 5kVRMS for 60s (VISO)
• Continuously Withstands 848VRMS (VIOWM)
• 1200VP Repetitive Peak Voltage (VIORM)
• Withstands ±10kV Surge per IEC 61000-4-5
●● Interfaces Directly with Most Micros and FPGAs
• Accepts 1.71V to 5.5V Supplies
●● Many Options Support Broad Applications
• 3 Data Rates (1Mbps, 25Mbps, 150Mbps)
• 3 Channel Direction Configuration
• 2 Output Default States (High or Low)
●● Low Power Consumption at High Data Rates
At 1.8V:
• 2.5mA per Channel Typical at 1Mbps
• 5.25mA per Channel Typical at 100Mbps
At 3.3V:
• 2.6mA per Channel Typical at 1Mbps
• 7.1mA per Channel Typical at 100Mbps
Safety Regulatory Approvals
(see Safety Regulatory Approvals)
● UL According to UL1577
● cUL According to CSA Bulletin 5A
● VDE 0884-11 Basic Insulation
Applications
●
●
●
●
●
Fieldbus Communications for Industrial Automation
Isolated SPI, RS-232, RS-485/RS-422
General Multichannel Isolation Applications
Battery Management
Medical Systems
Functional Diagram
VDDB
VDDA
VDDB
VDDA
MAX14934
MAX14935
MAX14936
ENB
ENB
INA1
INA2
OUTB1
INA1
OUTB2
INA2
DIGITAL
ISOLATOR
INA4
19-7067; Rev 7; 11/20
INA1
OUTB2
INA2
OUTB1
OUTB2
OUTB3
INA3
OUTB4
OUTA1
5kVRMS
DIGITAL
ISOLATOR
ENA
GNDA
ENB
OUTB1
5kVRMS
5kVRMS
INA3
GNDB
VDDB
VDDA
OUTB3
OUTA1
INB1
OUTA2
DIGITAL
ISOLATOR
INB1
INB2
ENA
GNDA
GNDB
GNDA
GNDB
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Absolute Maximum Ratings
VDDA to GNDA, VDDB to GNDB..............................-0.3V to +6V
INA_, ENA to GNDA.................................................-0.3V to +6V
INB_, ENB to GNDB................................................-0.3V to +6V
OUTA_ to GNDA..................................... -0.3V to (VDDA + 0.3V)
OUTB_ to GNDB..................................... -0.3V to (VDDB + 0.3V)
Short-Circuit Duration
(OUTA_ to GNDA, OUTB_ to GNDB) ...................Continuous
Continuous Power Dissipation (TA = +70°C)
Wide SOIC (derate 14.1mW/°C above +70°C)....... 1126.8mW
Operating Temperature Range.......................... -40°C to +125°C
Maximum Junction Temperature......................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow) .......................................+260°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.
Package Information
PACKAGE TYPE: 16 Wide SOIC
Package Code
W16M+8
Outline Number
21-0042
Land Pattern Number
90-0107
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA)
71°C/W
Junction to Case (θJC)
23°C/W
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.
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.
www.maximintegrated.com
Maxim Integrated │ 2
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
DC Electrical Characteristics
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
5.5
V
1.71
V
POWER SUPPLY
Operating Supply Voltage
VDDA
Relative to GNDA
1.71
VDDB
Relative to GNDB
1.71
VDD_ rising
1.45
Undervoltage Lockout Threshold
VUVLO_
Undervoltage Lockout Threshold
Hysteresis
VUVLO_
50
HYST
500kHz
square wave
IDDA
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
Supply Current (MAX14934_)
500kHz
square wave
IDDB
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
www.maximintegrated.com
1.58
mV
VDDA = 5V
1.2
1.9
VDDA = 3.3V
1.2
1.9
VDDA = 2.5V
1.2
1.9
VDDA = 1.8V
1.1
1.9
VDDA = 5V
2.1
2.7
VDDA = 3.3V
2
2.7
VDDA = 2.5V
2
2.7
VDDA = 1.8V
2
2.6
VDDA = 5V
5
6.6
VDDA = 3.3V
4.6
6.1
VDDA = 2.5V
4.5
6.0
VDDA = 1.8V
4.5
6.0
VDDB = 5V
8.1
11.2
VDDB = 3.3V
7.9
11.1
VDDB = 2.5V
7.9
11.0
VDDB = 1.8V
7.7
10.8
VDDB = 5V
12.8
15.9
VDDB = 3.3V
11.1
14.2
VDDB = 2.5V
10.2
13.4
VDDB = 1.8V
9.4
12.4
VDDB = 5V
27.2
35.4
VDDB = 3.3V
21.7
27.8
VDDB = 2.5V
17.6
23.0
VDDB = 1.8V
14.4
18.9
mA
Maxim Integrated │ 3
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
DC Electrical Characteristics (continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
500kHz
square wave
IDDA
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
Supply Current (MAX14935_)
500kHz
square wave
IDDB
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
www.maximintegrated.com
MIN
TYP
MAX
VDDA = 5V
3.4
5.3
VDDA = 3.3V
3.3
5.3
VDDA = 2.5V
3.3
5.3
VDDA = 1.8V
3.2
5.1
VDDA = 5V
5.6
7.1
VDDA = 3.3V
5
6.6
VDDA = 2.5V
4.7
6.4
VDDA = 1.8V
4.5
6.1
VDDA = 5V
12.4
16.0
VDDA = 3.3V
10.1
13.0
VDDA = 2.5V
9.1
11.6
VDDA = 1.8V
8.2
10.4
VDDB = 5V
6.5
9.2
VDDB = 3.3V
6.4
9.1
VDDB = 2.5V
6.3
9.1
VDDB = 1.8V
6.2
8.9
VDDB = 5V
10.3
12.8
VDDB = 3.3V
8.9
11.6
VDDB = 2.5V
8.2
11.0
VDDB = 1.8V
7.6
10.3
VDDB = 5V
22.7
29.1
VDDB = 3.3V
17.7
23.0
VDDB = 2.5V
14.7
19.4
VDDB = 1.8V
11.9
15.9
UNITS
mA
Maxim Integrated │ 4
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
DC Electrical Characteristics (continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
500kHz
square wave
IDDA
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
Supply Current (MAX14936_)
500kHz
square wave
TYP
MAX
VDDA = 5V
5.2
7.2
VDDA = 3.3V
5.2
7.2
VDDA = 2.5V
5.2
7.2
VDDA = 1.8V
5
7.0
VDDA = 5V
8.2
10.0
VDDA = 3.3V
7.2
9.1
VDDA = 2.5V
6.7
8.7
VDDA = 1.8V
6.3
8.2
VDDA = 5V
18
23.3
VDDA = 3.3V
14.2
18.4
VDDA = 2.5V
12.3
16.1
VDDA = 1.8V
10.5
13.6
VDDB = 5V
5.2
7.2
VDDB = 3.3V
5.2
7.2
VDDB = 2.5V
5.2
7.2
VDDB = 1.8V
IDDB
12.5MHz
square wave
(Note 2)
50MHz
square wave
(Note 2)
www.maximintegrated.com
MIN
5
7.0
VDDB = 5V
8.2
10.0
VDDB = 3.3V
7.2
9.1
VDDB = 2.5V
6.7
8.7
VDDB = 1.8V
6.3
8.2
VDDB = 5V
18
23.3
VDDB = 3.3V
14.2
18.4
VDDB = 2.5V
12.3
16.1
VDDB = 1.8V
10.5
13.6
UNITS
mA
Maxim Integrated │ 5
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
DC Electrical Characteristics (continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC INPUTS AND OUTPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
VIL
VHYS
IL
CIN
EN_ Pullup Current
IPU
Output Voltage Low
www.maximintegrated.com
0.7 x
VDDA
ENB, INB_ relative to GNDB
0.7 x
VDDB
VIH
Input Capacitance
Output Voltage High
ENA, INA_ relative to GNDA
VOH
VOL
V
ENA, INA_
relative to GNDA
1.71V ≤ VDDA ≤ 1.89V
0.6
2.25V ≤ VDDA ≤ 5.5V
0.8
ENB, INB_
relative to GNDB
1.71V ≤ VDDB ≤ 1.89V
0.6
2.25V ≤ VDDB ≤ 5.5V
0.8
VINA_ relative to
GNDA or
VINB_ relative to
GNDB
MAX1493_A/D
410
MAX1493_B/E
410
MAX1493_C/F
80
VINA_ = 0 or VDDA,
VINB_ = 0 or VDDB
-1
INA_, INB_, f = 1MHz
mV
+1
2
-4
VOUTA_ relative to GNDA,
IOUTA_ = -4mA (Note 3)
VDDA 0.4
VOUTB_ relative to GNDB,
IOUTB_ = -4mA (Note 3)
VDDB 0.4
-2.3
V
µA
pF
-1
µA
V
VOUTA_ relative to GNDA,
IOUTA_ = 4mA (Note 3)
0.4
VOUTB_ relative to GNDB,
IOUTB_ = 4mA (Note 3)
0.4
V
Maxim Integrated │ 6
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_A/D)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT AND OUTPUT CHANNELS
Common-Mode Transient
Immunity
CMTI
Maximum Data Rate
DRMAX
Minimum Pulse Width
PWMIN
Glitch Rejection
Propagation Delay (Figure 1)
tPHL
PWD
tSPLH
Propagation Delay Skew
Part-to-Part (Same Channel)
tSPHL
tSCSLH
Propagation Delay Skew Channel-to-Channel (Same Direction)
tSCSHL
www.maximintegrated.com
25
kV/µs
1
Mbps
INA_ to OUTB_, INB_ to OUTA_
INA_ to OUTB_, INB_ to OUTA_
tPLH
Pulse-Width Distortion
IN__ = GND_ or VDD_(Note 4)
1
32
ns
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
4.5V ≤ VDDA, VDDB ≤ 5.5V
38.2
54.1
3.0V ≤ VDDA, VDDB ≤ 3.6V
38.7
54.6
2.25V ≤ VDDA, VDDB ≤ 2.75V
39.7
55.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
42.9
58.4
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
4.5V ≤ VDDA, VDDB ≤ 5.5V
38.6
55.3
3.0V ≤ VDDA, VDDB ≤ 3.6V
38.9
55.6
2.25V ≤ VDDA, VDDB ≤ 2.75V
39.8
56.1
|tPLH - tPHL|
µs
1.71V ≤ VDDA, VDDB ≤ 1.89V
42.3
60.2
4.5V ≤ VDDA, VDDB ≤ 5.5V
0.4
4.5
3.0V ≤ VDDA, VDDB ≤ 3.6V
0.2
4.3
2.25V ≤ VDDA, VDDB ≤ 2.75V
0.1
3.9
1.71V ≤ VDDA, VDDB ≤ 1.89V
0.6
4.7
4.5V ≤ VDDA, VDDB ≤ 5.5V
26.6
3.0V ≤ VDDA, VDDB ≤ 3.6V
26.6
2.25V ≤ VDDA, VDDB ≤ 2.75V
26.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
26.9
4.5V ≤ VDDA, VDDB ≤ 5.5V
27.9
3.0V ≤ VDDA, VDDB ≤ 3.6V
27.7
2.25V ≤ VDDA, VDDB ≤ 2.75V
27.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
29.7
4.5V ≤ VDDA, VDDB ≤ 5.5V
6.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
6.7
2.25V ≤ VDDA, VDDB ≤ 2.75V
6.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
6.7
4.5V ≤ VDDA, VDDB ≤ 5.5V
6.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
6.7
2.25V ≤ VDDA, VDDB ≤ 2.75V
6.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
6.7
ns
ns
ns
ns
Maxim Integrated │ 7
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_A/D) (Continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
tSCOLH
Propagation Delay Skew
Channel-to-Channel (Opposing
Direction)
tSCOHL
CONDITIONS
MIN
TYP
4.5V ≤ VDDA, VDDB ≤ 5.5V
26.6
3.0V ≤ VDDA, VDDB ≤ 3.6V
26.6
2.25V ≤ VDDA, VDDB ≤ 2.75V
26.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
26.9
4.5V ≤ VDDA, VDDB ≤ 5.5V
27.9
3.0V ≤ VDDA, VDDB ≤ 3.6V
27.7
2.25V ≤ VDDA, VDDB ≤ 2.75V
27.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
Rise Time (Figure 1)
Fall Time (Figure 1)
Enable to Data Valid
Enable to Three-State
www.maximintegrated.com
tR
tF
tEN
tTRI
MAX
OUTA_/
OUTB_,
10% to 90%,
CL= 15pF
OUTA_/
OUTB_,
90% to 10%,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
UNITS
ns
29.7
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
ns
ns
4.5V ≤ VDDA, VDDB ≤ 5.5V
5.1
3.0V ≤ VDDA, VDDB ≤ 3.6V
5.5
2.25V ≤ VDDA, VDDB ≤ 2.75V
6.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
16.3
4.5V ≤ VDDA, VDDB ≤ 5.5V
2.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
4.4
2.25V ≤ VDDA, VDDB ≤ 2.75V
7.0
1.71V ≤ VDDA, VDDB ≤ 1.89V
11.7
ns
ns
Maxim Integrated │ 8
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_B/E)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT AND OUTPUT CHANNELS
Common-Mode Transient
Immunity
CMTI
Maximum Data Rate
DRMAX
Minimum Pulse Width
PWMIN
Glitch Rejection
Propagation Delay (Figure 1)
tPHL
PWD
tSPLH
Propagation Delay Skew
Part-to-Part (Same Channel)
tSPHL
tSCSLH
Propagation Delay Skew
Channel-to-Channel
(Same Direction)
tSCSHL
www.maximintegrated.com
25
kV/µs
25
Mbps
INA_ to OUTB_, INB_ to OUTA_
INA_ to OUTB_, INB_ to OUTA_
tPLH
Pulse-Width Distortion
IN__ = GND_ or VDD_ (Note 4)
40
15
ns
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
4.5V ≤ VDDA, VDDB ≤ 5.5V
20.9
27.5
3.0V ≤ VDDA, VDDB ≤ 3.6V
21.4
28.7
2.25V ≤ VDDA, VDDB ≤ 2.75V
22.4
31.2
1.71V ≤ VDDA, VDDB ≤ 1.89V
25.7
36.9
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
4.5V ≤ VDDA, VDDB ≤ 5.5V
21.1
28.8
3.0V ≤ VDDA, VDDB ≤ 3.6V
21.5
29.8
2.25V ≤ VDDA, VDDB ≤ 2.75V
22.3
31.9
1.71V ≤ VDDA, VDDB ≤ 1.89V
24.9
37.4
4.5V ≤ VDDA, VDDB ≤ 5.5V
0.2
2.6
3.0V ≤ VDDA, VDDB ≤ 3.6V
0.1
2.6
2.25V ≤ VDDA, VDDB ≤ 2.75V
0.1
2.4
1.71V ≤ VDDA, VDDB ≤ 1.89V
0.7
3.2
|tPLH - tPHL|
ns
4.5V ≤ VDDA, VDDB ≤ 5.5V
11.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
11.5
2.25V ≤ VDDA, VDDB ≤ 2.75V
11.3
1.71V ≤ VDDA, VDDB ≤ 1.89V
13.6
4.5V ≤ VDDA, VDDB ≤ 5.5V
9.8
3.0V ≤ VDDA, VDDB ≤ 3.6V
9.8
2.25V ≤ VDDA, VDDB ≤ 2.75V
11.1
1.71V ≤ VDDA, VDDB ≤ 1.89V
14.4
4.5V ≤ VDDA, VDDB ≤ 5.5V
3
3.0V ≤ VDDA, VDDB ≤ 3.6V
3
2.25V ≤ VDDA, VDDB ≤ 2.75V
3
1.71V ≤ VDDA, VDDB ≤ 1.89V
3
4.5V ≤ VDDA, VDDB ≤ 5.5V
3
3.0V ≤ VDDA, VDDB ≤ 3.6V
3
2.25V ≤ VDDA, VDDB ≤ 2.75V
3
1.71V ≤ VDDA, VDDB ≤ 1.89V
3
ns
ns
ns
ns
Maxim Integrated │ 9
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_B/E) (Continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
tSCOLH
Propagation Delay Skew
Channel to Channel (Opposing
Direction)
tSCOHL
CONDITIONS
MIN
TYP
4.5V ≤ VDDA, VDDB ≤ 5.5V
11.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
11.5
2.25V ≤ VDDA, VDDB ≤ 2.75V
11.3
1.71V ≤ VDDA, VDDB ≤ 1.89V
13.6
4.5V ≤ VDDA, VDDB ≤ 5.5V
9.8
3.0V ≤ VDDA, VDDB ≤ 3.6V
9.8
2.25V ≤ VDDA, VDDB ≤ 2.75V
11.1
1.71V ≤ VDDA, VDDB ≤ 1.89V
Rise Time (Figure 1)
Fall Time (Figure 1)
Enable to Data Valid
Enable to Three-State
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tR
tF
tEN
tTRI
MAX
OUTA_/
OUTB_,
10% to 90%,
CL= 15pF
OUTA_/
OUTB_,
90% to 10%,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
UNITS
ns
14.4
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
ns
ns
4.5V ≤ VDDA, VDDB ≤ 5.5V
5.1
3.0V ≤ VDDA, VDDB ≤ 3.6V
5.5
2.25V ≤ VDDA, VDDB ≤ 2.75V
6.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
16.3
4.5V ≤ VDDA, VDDB ≤ 5.5V
2.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
4.4
2.25V ≤ VDDA, VDDB ≤ 2.75V
7.0
1.71V ≤ VDDA, VDDB ≤ 1.89V
11.7
ns
ns
Maxim Integrated │ 10
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_C/F)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT AND OUTPUT CHANNELS
Common-Mode Transient
Immunity
CMTI
Maximum Data Rate
DRMAX
Minimum Pulse Width
PWMIN
kV/µs
150
Mbps
INA_ to OUTB_, INB_ to OUTB_
6.67
4.5V ≤ VDDA, VDDB ≤ 5.5V
5.1
7.5
tPLH
3.0V ≤ VDDA, VDDB ≤ 3.6V
5.2
8.1
2.25V ≤ VDDA, VDDB ≤ 2.75V
5.8
9.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
8.1
14
4.5V ≤ VDDA, VDDB ≤ 5.5V
4.9
7.4
tPHL
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
3.0V ≤ VDDA, VDDB ≤ 3.6V
5.3
8.3
2.25V ≤ VDDA, VDDB ≤ 2.75V
5.9
10.2
1.71V ≤ VDDA, VDDB ≤ 1.89V
8.2
14.9
4.5V ≤ VDDA, VDDB ≤ 5.5V
0.2
1
3.0V ≤ VDDA, VDDB ≤ 3.6V
0.1
1
2.25V ≤ VDDA, VDDB ≤ 2.75V
0.1
1
1.71V ≤ VDDA, VDDB ≤ 1.89V
0.1
1
PWD
tSPLH
Propagation Delay Skew Partto-Part (Same Channel)
tSPHL
tSCSLH
Propagation Delay Skew
Channel-to-Channel
(Same Direction)
tSCSHL
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25
INA_ to
OUTB_,
INB_ to
OUTA_,
CL = 15pF
Propagation Delay (Figure 1)
Pulse-Width Distortion
IN__ = GND_ or VDD_ (Note 4)
|tPLH - tPHL|
4.5V ≤ VDDA, VDDB ≤ 5.5V
3.0
3.0V ≤ VDDA, VDDB ≤ 3.6V
3.3
2.25V ≤ VDDA, VDDB ≤ 2.75V
4.3
1.71V ≤ VDDA, VDDB ≤ 1.89V
7.1
4.5V ≤ VDDA, VDDB ≤ 5.5V
2.8
3.0V ≤ VDDA, VDDB ≤ 3.6V
3.4
2.25V ≤ VDDA, VDDB ≤ 2.75V
4.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
7.9
4.5V ≤ VDDA, VDDB ≤ 5.5V
0.9
3.0V ≤ VDDA, VDDB ≤ 3.6V
1.2
2.25V ≤ VDDA, VDDB ≤ 2.75V
1.4
1.71V ≤ VDDA, VDDB ≤ 1.89V
1.6
4.5V ≤ VDDA, VDDB ≤ 5.5V
0.9
3.0V ≤ VDDA, VDDB ≤ 3.6V
1.2
2.25V ≤ VDDA, VDDB ≤ 2.75V
1.4
1.71V ≤ VDDA, VDDB ≤ 1.89V
1.6
ns
ns
ns
ns
ns
Maxim Integrated │ 11
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Dynamic Electrical Characteristics (MAX1493_C/F) (continued)
(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, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
tSCOLH
Propagation Delay Skew
Channel-to-Channel (Opposing
Direction)
tSCOHL
CONDITIONS
MIN
TYP
4.5V ≤ VDDA, VDDB ≤ 5.5V
3
3.0V ≤ VDDA, VDDB ≤ 3.6V
3.3
2.25V ≤ VDDA, VDDB ≤ 2.75V
4.3
1.71V ≤ VDDA, VDDB ≤ 1.89V
7.1
4.5V ≤ VDDA, VDDB ≤ 5.5V
2.8
3.0V ≤ VDDA, VDDB ≤ 3.6V
3.4
2.25V ≤ VDDA, VDDB ≤ 2.75V
4.6
1.71V ≤ VDDA, VDDB ≤ 1.89V
Rise Time (Figure 1)
Fall Time (Figure 1)
Enable to Data Valid
Enable to Three-State
Peak Eye Diagram Jitter
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tR
tF
tEN
tTRI
TJIT(PK)
MAX
OUTA_/
OUTB_,
10% to 90%,
CL= 15pF
OUTA_/
OUTB_,
90% to 10%,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
ENA to OUTA_,
ENB to OUTB_,
CL= 15pF
UNITS
ns
7.9
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
4.5V ≤ VDDA, VDDB ≤ 5.5V
2
3.0V ≤ VDDA, VDDB ≤ 3.6V
2
2.25V ≤ VDDA, VDDB ≤ 2.75V
2
1.71V ≤ VDDA, VDDB ≤ 1.89V
2
ns
ns
4.5V ≤ VDDA, VDDB ≤ 5.5V
5.1
3.0V ≤ VDDA, VDDB ≤ 3.6V
5.5
2.25V ≤ VDDA, VDDB ≤ 2.75V
6.7
1.71V ≤ VDDA, VDDB ≤ 1.89V
16.3
4.5V ≤ VDDA, VDDB ≤ 5.5V
2.7
3.0V ≤ VDDA, VDDB ≤ 3.6V
4.4
2.25V ≤ VDDA, VDDB ≤ 2.75V
7.0
VDDA, VDDB ≤ 1.89V
11.7
VDDA, VDDB = 5.0V
140
VDDA, VDDB = 3.3V
130
VDDA, VDDB = 2.5V
140
VDDA, VDDB = 1.8V
160
ns
ns
ps
Maxim Integrated │ 12
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
ESD Protection
PARAMETER
SYMBOL
ESD
Note
Note
Note
Note
1:
2:
3:
4:
CONDITIONS
MIN
TYP
Human Body Model, All Pins
MAX
UNITS
±4
kV
All devices are 100% production tested at TA = +125°C. Specifications over temperature are guaranteed by design.
Not production tested. Guaranteed by design.
All currents into the device are positive. All currents out of the device are negative.
CMTI is the maximum sustainable common-mode voltage slew rate while maintaining the correct output. CMTI applies to both rising
and falling common-mode voltage edges. Tested with the transient generator connected between GNDA and GNDB
(VCM = 1000V).
VDDA
INA1, INA2
50%
GNDA
VDDA
0.1µF
50Ω
TEST
SOURCE
VDDA
VDDB
0.1µF
VDDB
MAX14934
MAX14935
MAX14936
INA_
tPLH
OUTB1
GNDB
tPLH
VDDB
OUTB_
GNDA
50%
50%
50%
GNDB
CL
RL
(A)
VDDB
tSCSHL
90%
50%
OUTB2
GNDB
10%
tR
tF
(B)
Figure 1. Test Circuit (A) and Timing Diagram (B)
Safety Regulatory Approvals
UL
The MAX14934–MAX14936 are certified under UL1577. For more details, refer to File E351759.
Rated up to 5000VRMS isolation voltage for single protection.
cUL (Equivalent to CSA notice 5A)
The MAX14934-MAX14936 are certified up to 5000VRMS for single protection. For more details, refer to File E351759.
VDE
The MAX14934-MAX14936 are certified to DIN VDE V 0884-11: 2017-01. For details, see file ref. 5015017-4880-0001/272147/TL7/
SCT. Basic Insulation, Maximum Transient Isolation Voltage 8400VPK, Maximum Repetitive Peak Isolation Voltage 1200VPK
This coupler is suitable for “safe electrical insulation” only within the safety ratings. Compliance with the safety ratings shall be
ensured by means of suitable protective circuits.
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Maxim Integrated │ 13
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
IEC Insulation Testing
TUV
The MAX14934-MAX14936 are tested under TUV.
IEC 60950-1: Up to 1200VPK (848VRMS) working voltage for basic insulation.
IEC 61010-1 (ed. 3): Up to 848VRMS working voltage for basic insulation. For details, see Technical Report number 095-72100581-100.
IEC 60601-1 (ed. 3): For details see Technical Report number 095-72100581-200.
Basic insulation 1 MOOP, 1200VPK (848VRMS)
Withstand isolation voltage (VISO) for 60s, 5000VRMS
MAX14934–MAX14936 Insulation Characteristics
PARAMETER
Partial Discharge Test Voltage
SYMBOL
VPR
CONDITIONS
VALUE
UNITS
Method B1 = VIORM x 1.875
(t = 1s, partial discharge < 5pC)
2250
VP
Maximum Repetitive Peak Isolation Voltage
VIORM
(Note 5)
1200
VP
Maximum Working Isolation Voltage
VIOWM
Continuous RMS voltage (Note 5)
848
VRMS
Maximum Transient Isolation Voltage
VIOTM
t = 1s (Note 5)
8400
VP
fSW = 60Hz, duration = 60s
(Note 5, 6)
5000
VRMS
10
kV
Maximum Withstand Isolation Voltage
Maximum Surge Isolation Voltage
Insulation Resistance
VISO
VIOSM
RIO
Basic insulation, 1.2/50µs pulse
per IEC 61000-4-5 (Note 5, 7)
VIO = 500V, TA = 25°C
> 1012
VIO = 500V, 100°C ≤ TA ≤ 125°C
> 1011
VIO = 500V at TS = 150°C
> 109
Ω
Barrier Capacitance Side A to Side B
CIO
fSW = 1MHz (Note 8)
2
pF
Minimum Creepage Distance
CPG
Wide SOIC
8
mm
Minimum Clearance Distance
CLR
Wide SOIC
8
mm
0.015
mm
Internal Clearance
Comparative Tracking Index
Distance through insulation
CTI
Material Group II (IEC 60112)
Climatic Category
Pollution Degree
(DIN VDE 0110, Table 1)
Note
Note
Note
Note
575
40/125/21
2
5: VISO, VIOTM, VIOSM, VIOWM, and VIORM are defined by the IEC 60747-5-5 standard.
6: Products are qualified at VISO for 60s and 100% production tested at 120% of VISO for 1s.
7: Devices are immersed in oil during surge characterization.
8: Capacitance is measured with all pins on field-side and logic-side tied together.
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Maxim Integrated │ 14
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Safety Limits
Damage to the IC can result in a low-resistance path
to ground or to the supply and, without current limiting,
the MAX14934–MAX14936 could dissipate excessive
amounts of power. Excessive power dissipation can damage the die and result in damage to the isolation barrier,
potentially causing downstream issues.Table 1 shows the
safety limits for the MAX14934–MAX14936.
The maximum safety temperature (TS) for the device is
the 150°C maximum junction temperature specified in
the Absolute Maximum Ratings. The power dissipation
(PD) and junction-to-ambient thermal impedance (θJA)
determine the junction temperature. Thermal impedance values (θJA and θJC) are available in the Package
Information section of the datasheet. Calculate the junction temperature (TJ) as:
TJ = TA + (PD x θJA)
Figure 2 to Figure 3 show the thermal derating curves for
the safety power limiting and safety current limiting of the
devices. Ensure that the junction temperature does not
exceed 150°C.
Table 1. Safety Limiting Values for the MAX14934–MAX14936
PARAMETER
SYMBOL
Safety Current on Any Pin
(No Damage to Isolation Barrier)
IS
Total Safety Power Dissipation
PS
Maximum Safety Temperature
TS
TEST CONDITIONS
MAX
UNITS
TJ = 150°C, TA = 25°C
300
mA
TJ = 150°C, TA = 25°C
1760
mW
150
°C
THERMAL DERATING CURVE
FOR SAFETY POWER LIMITING
THERMAL DERATING CURVE
FOR SAFETY CURRENT LIMITING
1800
350
16 WIDE SOIC PACKAGE,
MULTILAYER BOARD
MULTILAYER BOARD
SAFE CURRENT LIMIT (mA)
SAFE POWER LIMIT (mW)
1600
1400
1200
1000
800
600
400
250
200
150
100
50
200
0
300
0
25
50
75
100
125
150
175
200
AMBIENT TEMPERATURE (°C)
Figure 2. Thermal Derating Curve for Safety Power Limiting
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0
0
25
50
75
100
125
150
175
200
AMBIENT TEMPERATURE (°C)
Figure 3. Thermal Derating Curve for Safety Current Limiting
Maxim Integrated │ 15
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Typical Operating Characteristics
(VDDA - VGNDA = +3.3V, VDDB - VGNDB = +3.3V, VGNDA = VGNDB, TA = +25°C, unless otherwise noted.)
DRIVING ONE CHANNEL ON
SIDE A
ALL OTHER CHANNELS LOW
MAX1493_C/F
2.8
25
2.2
2.0
1.8
VDD_ = 1.8V
VDD_ = 2.5V
VDD_ = 3.3V
VDD_ = 5.0V
1.6
1.4
1.2
1.0
0
25
50
75
100
DRIVING ONE CHANNEL ON
SIDE A
ALL OTHER CHANNELS LOW
MAX14934C/F
20
2.4
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
2.6
SIDE B SUPPLY CURRENT
vs. DATA RATE
125
10
VDD_ = 3.3V
VDD_ = 5V
VDD_ = 2.5V
5
0
150
VDD_ = 1.8V
0
25
12
PROPAGATION DELAY
vs. TEMPERATURE
toc04
35.0
VDDA = VDDB
INA_ TO OUTB_
MAX1493_C/F
30.0
10
8
6
4
2
0
VDD_ = 1.8V
VDD_ = 3.3V
VDD_ = 2.5V
VDD_ = 5V
-50 -25
0
25
50
75
75
100
125
toc05
20.0
30.0
20.0
15.0
MAX1493_B/E
MAX1493_C/F
10.0
5.0
1.5
2.5
3.5
4.5
MINIMUM PULSE WIDTH
-50 -25
500mV
/div
OUT__
0
25
50
75
100 125 150
PROPAGATION DELAY
vs. VDDB VOLTAGE
toc06
VDDB = 3.3V
INA_ TO OUTB_
25.0
20.0
MAX1493_B/E
15.0
10.0
MAX1493_C/F
5.0
0.0
5.5
1.5
2.5
3.5
4.5
5.5
VDDB VOLTAGE (V)
MINIMUM PULSE WIDTH
toc08
toc09
MAX1493_C/F
MAX1493_B/E
IN__
VDD_ = 5V
VDD_ = 2.5V
VDDA VOLTAGE (V)
EYE DIAGRAM at 150Mbps toc07
VDD_ = 3.3V
VDD_ = 1.8V
15.0
35.0
VDDB = 3.3V
INA_ TO OUTB_
25.0
0.0
100 125 150
MAX1493_C/F
30s OF PRBS
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25.0
TEMPERATURE (°C)
PROPAGATION DELAY
vs. VDDA VOLTAGE
TEMPERATURE (°C)
1ns/div
30.0
10.0
150
toc03
VDDA = VDDB
INA_ TO OUTB_
MAX1493_B/E
DATA RATE (Mbps)
PROPAGATION DELAY (ns)
PROPAGATION DELAY (ns)
14
50
PROPAGATION DELAY
vs. TEMPERATURE
35.0
15
DATA RATE (Mbps)
16
toc02
PROPAGATION DELAY (ns)
3.0
toc01
PROPAGATION DELAY (ns)
SIDE A SUPPLY CURRENT
vs. DATA RATE
1V/div
40ns
5ns
1V/div
IN__
40ns
10ns/div
1V/div
5ns
OUT__
1V/div
2.5ns/div
Maxim Integrated │ 16
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Pin Configurations
TOP VIEW
VDDA
1
GNDA
2
+
16
VDDB
VDDA
1
15
GNDB
GNDA
2
14
OUTB1
INA1
3
13
OUTB2
INA2
4
+
16 VDDB
VDDA
1
15 GNDB
GNDA
2
14 OUTB1
INA1
3
13 OUTB2
INA2
4
12 OUTB3
OUTA1
5
+
16 VDDB
15 GNDB
14 OUTB1
INA1
3
INA2
4
INA3
5
12
OUTB3
INA3
5
INA4
6
11 OUTB4
OUTA1
6
11 INB1
OUTA2
6
11 INB2
I.C.
7
10 ENB
ENA
7
10 ENB
ENA
7
10 ENB
GNDA
8
9
GNDA
8
9
GNDA
8
9
MAX14934
GNDB
SOIC
MAX14935
GNDB
SOIC
MAX14936
13 OUTB2
12 INB1
GNDB
SOIC
Pin Description
PIN
NAME
VOLTAGE
RELATIVE TO
FUNCTION
MAX14934
MAX14935
MAX14936
1
1
1
VDDA
Power Supply. Bypass VDDA with a 0.1µF ceramic
capacitor as close as possible to the pin.
2, 8
2, 8
2, 8
GNDA
Ground Reference for Side A
3
3
3
INA1
Logic Input 1 on Side A. INA1 corresponds to OUTB1.
GNDA
GNDA
—
4
4
4
INA2
Logic Input 2 on Side A. INA2 corresponds to OUTB2.
GNDA
5
5
—
INA3
Logic Input 3 on Side A. INA3 corresponds to OUTB3.
GNDA
6
—
—
INA4
Logic Input 4 on Side A. INA4 corresponds to OUTB4.
GNDA
7
—
—
I.C.
Internally Connected. Leave unconnected or connect
to GNDA or VDDA.
—
—
6
5
OUTA1
Logic Output 1 on Side A
GNDA
—
—
6
OUTA2
Logic Output 2 on Side A
GNDA
Active-High Enable for Side A. ENA has an internal
2μA pullup to VDDA.
GNDA
—
7
7
ENA
9, 15
9, 15
9, 15
GNDB
10
10
10
ENB
Ground Reference for Side B
—
Active-High Enable for Side B. ENB has an internal
2μA pullup to VDDB.
GNDB
11
—
—
OUTB4
Logic Output 4 on Side B
GNDB
—
11
12
INB1
Logic Input 1 on Side B. INB1 corresponds to OUTA1.
GNDB
—
—
11
INB2
Logic Input 2 on Side B. INB2 corresponds to OUTA2.
GNDB
12
12
—
OUTB3
Logic Output 3 on Side B
GNDB
13
13
13
OUTB2
Logic Output 2 on Side B
GNDB
14
14
14
OUTB1
Logic Output 1 on Side B
GNDB
Power Supply. Bypass VDDB with a 0.1µF ceramic
capacitor as close as possible to the pin.
GNDB
16
16
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16
VDDB
Maxim Integrated │ 17
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Typical Application Circuits
3.3V
5V
0.1µF
24V
0.1µF
VDDB
VDDA
MAX14934
5V OUT
ENB
INA1
OUTB1
INA2
OUTB2
INA3
OUTB3
INA4
OUTB4
GNDA
GNDB
3.3V
GPIO PORT
5V
0.1µF
24V DIGITAL I/O
0.1µF
VDDB
VDDA
MAX14934
ENB
OUTB1
INA1
OUTB2
INA2
OUTB3
INA3
OUTB4
INA4
GNDB
GNDA
5kVRMS
ISOLATION
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Maxim Integrated │ 18
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Typical Application Circuits (continued)
1.8V
3.3V
0.1µF
0.1µF
VDDB
VDDA
MAX14935
µC
ENA
ENB
GPIO
INA1
OUTB1
CS
SCLK
INA2
OUTB2
SCLK
MOSI
INA3
OUTB3
MOSI
MISO
OUTA1
INB1
MISO
GNDA
ADC
GNDB
5kVRMS
ISOLATION
5V
2.5V
0.1µF
0.1µF
VDDB
VDDA
MAX14936
µC
ENA
ENB
RTS
INA1
OUTB1
T1IN
Tx
INA2
OUTB2
T2IN
CTS
OUTA3
INB3
R1OUT
Rx
OUTA4
INB4
R2OUT
GNDA
MAX13223
RS-232
TRANSCEIVER
GNDB
5kVRMS
ISOLATION
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Maxim Integrated │ 19
MAX14934–MAX14936
Detailed Description
The MAX14934–MAX14936 are a family of four-channel
digital isolators. The MAX14934–MAX14936 family transfers
digital signals between circuits with different power
domains. The devices are rated for 5kVRMS isolation voltage
for 60 seconds. This family of digital isolators offers lowpower operation, high electromagnetic interference (EMI)
immunity, and stable temperature performance through
Maxim’s proprietary process technology. The devices
isolate different ground domains and block high-voltage/
high-current transients from sensitive or human interface
circuitry.
The MAX14934–MAX14936 family offers three unidirectional channel configurations for design convenience.
The MAX14934 features four channels transferring digital
signals in one direction for applications such as isolated
digital I/O. The MAX14935 has three channels transmitting
data in one direction and one channel transmitting in the
opposite direction, making it ideal for applications such as
isolated SPI and RS-485 communication. The MAX14936
provides further design flexibility with two channels in each
direction for isolated RS-232 or other applications.
Devices are available with data rates from DC up to 1Mbps
(A/D versions), 25Mbps (B/E versions), or 150Mbps (C/F
versions). Each device can also be ordered with defaulthigh or default-low outputs. This is the state an output will
go to when the input side of the device is unpowered.
The devices have two supply inputs, VDDA and VDDB,
that independently set the logic levels on either side of
the device. VDDA and VDDB are referenced to GNDA and
GNDB, respectively. The MAX14934–MAX14936 family
also features a refresh circuit to ensure output accuracy
when an input remains in the same state indefinitely.
Digital Isolation
The MAX14934–MAX14936 family provides galvanic
isolation for digital signals that are transmitted between
two ground domains. Up to 1200VPEAK of continuous
isolation is supported, as well as transient differences of
up to 5kVRMS for up to 60 seconds.
Level Shifting
The wide supply voltage range of both VDDA and VDDB
allows the MAX14934–MAX14936 family to be used for
level translation in addition to isolation. VDDA and VDDB
can be independently set to any voltage from 1.71V
to 5.5V. The supply voltage sets the logic level on the
corresponding side of the isolator.
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Four-Channel, 5kVRMS Digital Isolators
Unidirectional Channels
Each channel of the MAX14934–MAX14936 is
unidirectional; it only passes data in one direction, as
indicated in the functional diagram. Each device features
four unidirectional channels that operate independently
with guaranteed data rates from DC up to 1Mbps (A/D
versions), 25Mbps (B/E versions), or 150Mbps (C/F
versions). The output driver of each channel is push-pull,
eliminating the need for pullup resistors. The outputs are
able to drive both TTL and CMOS logic inputs.
Startup and Undervoltage Lockout
The VDDA and VDDB supplies are both internally
monitored for undervoltage conditions. Undervoltage
events can occur during power-up, power-down, or during
normal operation due to a sagging supply voltage. When
an undervoltage condition is detected on either supply, all
outputs go to their default states regardless of the status
of the inputs (Table 2). Figure 4 through Figure 7 show the
behavior of the outputs during power-up and power-down.
Applications Information
Power-Supply Sequencing
The MAX14934–MAX14936 do not require special powersupply sequencing. The logic levels are set independently
on either side by VDDA and VDDB. Each supply can be
present over the entire specified range regardless of the
level or presence of the other supply.
Power-Supply Decoupling
To reduce ripple and the chance of introducing data errors,
bypass VDDA and VDDB with 0.1µF ceramic capacitors to
GNDA and GNDB, respectively. Place the bypass capacitors
as close to the power-supply input pins as possible.
Layout Considerations
The PCB designer should follow some critical recommendations in order to get the best performance from the
design.
●●
Keep the input/output traces as short as possible. To
keep signal paths low-inductance, avoid using vias.
●●
Have a solid ground plane underneath the high-speed
signal layer.
●●
Keep the area underneath the MAX14934–MAX14936
free from ground and signal planes. Any galvanic or
metallic connection between the Side A and Side B
defeats the isolation.
Maxim Integrated │ 20
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Table 2. Output Behavior During Undervoltage Conditions
VIN
VDDA
VDDB
1
Powered
Powered
0
Powered
Powered
X
Undervoltage
Powered
X
Powered
Undervoltage
ENA
ENB
1
1
1
1
0
0
Hi-Z
Hi-Z
1
1
0
0
0
0
Hi-Z
Hi-Z
1
1
Default
Default
0
0
Hi-Z
Hi-Z
1
1
Default
Default
0
0
Hi-Z
Hi-Z
MAX1493_A/B/C
INPUT SET TO HIGH
VOUTA
VOUTB
MAX1493_A/B/C
INPUT SET TO LOW
VDDA
VDDA
3V/div
3V/div
VDDB
VDDB
OUTA_
OUTA_
OUTB_
OUTB_
200µs/div
200µs/div
Figure 4. Undervoltage Lockout Behavior (MAX1493_A/B/C High)
Figure 5. Undervoltage Lockout Behavior (MAX1493_A/B/C Low)
MAX1493_D/E/F
INPUT SET TO HIGH
MAX1493_D/E/F
INPUT SET TO LOW
VDDA
3V/div
VDDA
3V/div
VDDB
VDDB
OUTA_
OUTA_
OUTB_
200µs/div
Figure 6. Undervoltage Lockout Behavior (MAX1493_D/E/F High)
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OUTB_
200µs/div
Figure 7. Undervoltage Lockout Behavior (MAX1493_D/E/F Low)
Maxim Integrated │ 21
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Product Selector Guide
MAX1493 5
F A
W E +
CHANNEL
CONFIGURATION
4: 4/0
5: 3/1
6: 2/2
DEVICE CONFIGURATION
MAX IMUM DATA RATE
DEFAULT OUTPUT
(SEE TABLE)
MAX DATA RATE
1Mbps
25Mbps
150Mbps
DEFAULT-HIGH OUTP UT
A
B
C
DEFAULT-LOW OUTPUT
D
E
F
TEMP RANGE : -40°C TO +125°C
PACKAGE: W SOIC
PINS: 16
LEAD-FREE/RoHS COMPLIANT
Ordering Information
CHANNEL
CONFIGURATION
DATA RATE
(Mbps)
OUTPUT
TEMP RANGE
(°C)
PIN-PACKAGE
MAX14934AAWE+
4/0
1
Default high
-40 to +125
16 wide SOIC
MAX14934BAWE+
4/0
25
Default high
-40 to +125
16 wide SOIC
MAX14934CAWE+
4/0
150
Default high
-40 to +125
16 wide SOIC
MAX14934DAWE+
4/0
1
Default low
-40 to +125
16 wide SOIC
MAX14934EAWE+
4/0
25
Default low
-40 to +125
16 wide SOIC
MAX14934FAWE+
4/0
150
Default low
-40 to +125
16 wide SOIC
MAX14935AAWE+
3/1
1
Default high
-40 to +125
16 wide SOIC
MAX14935BAWE+
3/1
25
Default high
-40 to +125
16 wide SOIC
MAX14935CAWE+
3/1
150
Default high
-40 to +125
16 wide SOIC
MAX14935DAWE+
3/1
1
Default low
-40 to +125
16 wide SOIC
MAX14935EAWE+
3/1
25
Default low
-40 to +125
16 wide SOIC
MAX14935FAWE+
3/1
150
Default low
-40 to +125
16 wide SOIC
MAX14936AAWE+
2/2
1
Default high
-40 to +125
16 wide SOIC
MAX14936BAWE+
2/2
25
Default high
-40 to +125
16 wide SOIC
MAX14936CAWE+
2/2
150
Default high
-40 to +125
16 wide SOIC
MAX14936DAWE+
2/2
1
Default low
-40 to +125
16 wide SOIC
MAX14936EAWE+
2/2
25
Default low
-40 to +125
16 wide SOIC
MAX14936FAWE+
2/2
150
Default low
-40 to +125
16 wide SOIC
PART
+Denotes a lead(Pb)-free/RoHS-compliant package.
Chip Information
PROCESS: BiCMOS
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Maxim Integrated │ 22
MAX14934–MAX14936
Four-Channel, 5kVRMS Digital Isolators
Revision History
REVISION
NUMBER
REVISION
DATE
0
9/14
Initial release
1
12/14
Removed future product notation from MAX14935DAWE+ in Ordering Information
table, changed “basic insulation” to “single protection” in Safety Regulatory Approvals
table, and updated third bullet of Many Options Support Broad Applications in
Features and Benefits section.
1, 13, 22
2
3/15
Changed future product status for: MAX14934DAWE+, MAX14936AAWE+,
MAX14936BAWE+, MAX14936DAWE+, MAX14936EAWE+, and MAX14936FAWE+.
22
3
7/15
Updated Benefits and Features section, Safety Regulatory Approvals, Insulation
Characteristics tables, and Pin Configuration tables.
1, 13, 14, 16
4
4/16
Fixed typos, updated Safety Regulatory Approvals, and updated Ordering Information/
Selection Guide.
1, 13, 14, 21
5
5/16
Updated TUV information and created IEC Insulation Testing table
6
1/17
Updated Figure 1 text and removed VDE pending
11/20
Updated General Description, Dynamic Electrical Characteristics (MAX1493_A/D),
Dynamic Electrical Characteristics (MAX1493_B/E), Dynamic Electrical Characteristics
(MAX1493_C/F), Safety Regulatory Approvals, Typical Operating Circuits, and Layout
Considerations sections; added Safety Limits and Product Selector Guide sections;
added new Figures 2 and 3, and renumbered subsequent figures; added Table 1 and
renumbered subsequent tables; added a Product Selector Guide
9
PAGES
CHANGED
DESCRIPTION
—
1, 13
1, 13, 14
1, 5–10, 14–24
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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