MAX14434 [MAXIM]
Four-Channel, Fast, Low-Power, 5kVRMS Digital Isolators;
| 型号： | MAX14434 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Four-Channel, Fast, Low-Power, 5kVRMS Digital Isolators |
| 文件： | 总26页 (文件大小：1403K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
General Description
Benefits and Features
● Robust Galvanic Isolation for Fast Digital Signals
The MAX14434–MAX14436 are the fastest, lowest power,
4-channel, digital galvanic isolators on the market today
using Maxim’s proprietary process technology. These
devices transfer digital signals between circuits with
different power domains while using as little as 0.58mW per
channel at 1Mbps with a 1.8V supply. The MAX14434/5/6
• 200Mbps Data Rate
• Withstands 5kV
for 60s (V
)
RMS
ISO
• Continuously Withstands 848V
• Withstands ±10kV Surge between GNDA and
GNDB with 1.2/50μs waveform
(V
)
RMS IOWM
• High CMTI (50kV/μs, Typical)
have an isolation rating of 5kV
for 60 seconds.
RMS
● Low Power Consumption
The MAX14434–MAX14436 family offers all three
possible unidirectional channel configurations to
accommodate any 4-channel design, including SPI,
RS-232, RS-485, and digital I/O applications. Output
enable for the A side of the MAX14435R/S/U/V is active-
low, making them ideal for isolating a port on a shared
SPI bus since the CS signal can directly enable the MISO
signal on the isolator. All other devices in the family have
the traditional active-high enable.
• 1.1mW per Channel at 1Mbps with V
• 3.5mW per Channel at 100Mbps with V
= 3.3V
DD
= 1.8V
DD
● Options to Support a Broad Range of Applications
• 2 Data Rates (25Mbps, 200Mbps)
• 3 Channel Direction Configurations
• 2 Output Default States (High/Low)
Applications
● Fieldbus Communications for Industrial Automation
● Isolated RS-485/RS-422, CAN
● General Isolation Application
● Battery Management
Devices are available with a maximum data rate of either
25Mbps or 200Mbps and with outputs that are either
default-high or default-low. The default is the state the
output assumes when the input is either not powered
or is open-circuit. See the Ordering Information for suf-
fixes 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.
● Medical Systems
Safety Regulatory Approvals (Pending)
● UL According to UL1577
● cUL According to CSA Bulletin 5A
● VDE 0884-10
The MAX14434–MAX14436 are available in a 16-pin wide-
body SOIC package with 8mm of creepage and clearance.
The package material has a minimum comparative track-
ing index (CTI) of 600V, which gives it a group 1 rating
in creepage tables. All devices are rated for operation at
ambient temperatures of -40°C to +125°C.
Ordering Information appears at end of data sheet.
19-100102; Rev 3; 1/19
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Absolute Maximum Ratings
V
to GNDA........................................................-0.3V to +6V
Continuous Power Dissipation (T = +70°C)
A
DDA
V
to GNDB........................................................-0.3V to +6V
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............................ -60°C to +150°C
Soldering Temperature (reflow).......................................+260°C
DDB
IN_, EN_ on Side A to GNDA..................................-0.3V to +6V
IN_, EN_ on Side B to GNDB .................................-0.3V to +6V
OUT_ on Side A to GNDA......................-0.3V to (V
OUT_ on Side B to GNDB .....................-0.3V to (V
Short-Circuit Duration
+ 0.3V)
+ 0.3V)
DDA
DDB
OUT_ on Side A to GNDA,
OUT_ on Side B to GNDB.....................................Continuous
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only; 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
W16MS+12
21-0042
Outline Number
Land Pattern Number
90-0107
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θ
)
71°C/W
24°C/W
JA
Junction to Case (θ
)
JC
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.
DC Electrical Characteristics
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 1)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
POWER SUPPLY
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
Relative to GNDA
Relative to GNDB
1.71
1.71
5.5
5.5
DDA
Supply Voltage
V
DDB
Undervoltage-Lockout
Threshold
V
V
rising
1.5
1.6
45
1.66
V
UVLO_
DD_
Undervoltage-Lockout
Threshold Hysteresis
V
mV
UVLO_HYST
Maxim Integrated
│ 2
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
DC Electrical Characteristics (continued)
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 1)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
0.52
0.51
0.50
0.49
1.63
1.59
1.58
1.54
4.5
MAX
0.96
0.93
0.92
0.64
2.42
2.36
2.33
2.00
6.14
6.00
5.93
5.43
1.47
1.41
1.39
1.32
3.84
2.74
2.36
2.02
11.17
6.88
5.38
4.18
1.10
1.06
1.05
0.83
2.80
2.47
2.35
2.02
7.43
6.25
5.81
5.15
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= 5V
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
Supply Current (MAX14434_)
(Note 2)
12.5MHz square
wave, C = 0pF
L
I
mA
DDA
4.39
4.35
4.21
0.87
0.82
0.81
0.79
2.97
2.00
1.69
1.43
9.52
5.68
4.45
3.46
0.62
0.60
0.59
0.57
1.98
1.70
1.61
1.52
5.77
4.73
4.38
4.03
= 3.3V
= 2.5V
= 1.8V
= 5V
50MHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
Supply Current (MAX14434_)
(Note 2)
12.5MHz square
wave, C = 0pF
L
I
mA
DDB
= 3.3V
= 2.5V
= 1.8V
= 5V
50MHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
Supply Current (MAX14435_)
(Note 2)
12.5MHz square
wave, C = 0pF
L
I
mA
DDA
= 3.3V
= 2.5V
= 1.8V
50MHz square
wave, C = 0pF
L
Maxim Integrated
│ 3
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
DC Electrical Characteristics (continued)
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 1)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
0.78
0.75
0.74
0.72
2.64
1.90
1.66
1.46
8.26
5.36
4.42
3.66
0.70
0.67
0.66
0.64
2.31
1.81
1.64
1.50
7.04
5.06
4.40
3.85
0.70
0.67
0.66
0.65
2.31
1.80
1.64
1.49
7.01
5.04
4.40
3.84
MAX
1.35
1.30
1.28
1.16
3.49
2.65
2.36
2.03
9.91
6.66
5.52
4.51
1.22
1.17
1.16
0.99
3.15
2.56
2.35
2.02
8.70
6.46
5.67
4.83
1.24
1.19
1.17
1.00
3.15
2.57
2.36
2.03
8.66
6.46
5.67
4.83
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= 5V
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDA
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
DDB
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
Supply Current (MAX14435_)
(Note 2)
12.5MHz square
wave, C = 0pF
L
I
mA
DDB
= 3.3V
= 2.5V
= 1.8V
= 5V
50MHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
12.5MHz square
wave, C = 0pF
L
I
mA
DDA
= 3.3V
= 2.5V
= 1.8V
= 5V
50MHz square
wave, C = 0pF
L
Supply Current (MAX14436_)
(Note 2)
= 3.3V
= 2.5V
= 1.8V
= 5V
500kHz square
wave, C = 0pF
L
= 3.3V
= 2.5V
= 1.8V
= 5V
12.5MHz square
wave, C = 0pF
L
I
mA
DDB
= 3.3V
= 2.5V
= 1.8V
50MHz square
wave, C = 0pF
L
Maxim Integrated
│ 4
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
DC Electrical Characteristics (continued)
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 1)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC INPUTS AND OUTPUTS
EN_, IN_,
relative to GND_
0.7 x
V
DD_
2.25V ≤ V
≤ 5.5V
DD_
Input High Voltage
V
V
IH
EN_, IN_,
relative to GND_
0.75 x
V
DD_
1.71V ≤ V
< 2.25V
DD_
EN_, IN_,
relative to GND_
2.25V ≤ V
≤ 5.5V
0.8
0.7
DD_
Input Low Voltage
Input Hysteresis
V
V
IL
EN_, IN_,
relative to GND_
1.71V ≤ V
< 2.25V
DD_
EN_, IN_,
relative to GND_
MAX1443_ B/E/R/U
MAX1443_C/F/S/V
410
80
V
mV
HYS
EN_, IN_,
relative to GND_
Input Pullup Current (Note 3)
Input Pulldown Current (Note 3)
EN Pullup Current (Note 3)
Input Capacitance
I
IN_, MAX1443_B/C/R/S
IN_, MAX1443_E/F/U/V
EN_
-10
-5
5
-1.5
10
µA
µA
µA
pF
PU
PD
I
1.5
-10
I
-5
2
-1.5
PU_EN
C
IN_, f
= 1MHz
IN
SW
V
relative to GND_
= 4mA source
V
DD_
- 0.4
OUT_
Output Voltage High (Note 3)
Output Voltage Low (Note 3)
V
V
V
OH
I
OUT_
V
relative to GND_
= 4mA sink
OUT_
V
0.4
OL
I
OUT_
Maxim Integrated
│ 5
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Dynamic Characteristics MAX1443_C/F/S/V
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 3)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
IN_ = GND_ or V (Note 4)
MIN
TYP
MAX
UNITS
Common-Mode Transient
Immunity
CMTI
50
kV/µs
DD_
2.25V ≤ V
1.71V ≤ V
≤ 5.5V
200
150
DD_
Maximum Data Rate
Minimum Pulse Width
DR
Mbps
ns
MAX
≤ 1.89V
DD_
2.25V ≤ V
1.71V ≤ V
≤ 5.5V
5
DD_
IN_ to
OUT_
PW
MIN
≤ 1.89V
6.67
9.2
DD_
4.5V ≤ V
≤ 5.5V
≤ 3.6V
4.1
4.2
4.9
7.1
5.4
5.9
DD_
DD_
IN_ to
OUT_,
C = 15pF
L
3.0V ≤ V
10.2
13.4
20.3
t
PLH
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
7.1
DD_
DD_
Propagation Delay
(Figure 1)
10.9
ns
ns
4.5V ≤ V
≤ 5.5V
≤ 3.6V
4.3
4.4
5.1
7.2
5.6
6.2
9.4
10.5
14.1
21.7
2
DD_
IN_ to
OUT_,
3.0V ≤ V
DD_
t
PHL
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
7.3
DD_
C = 15pF
L
10.9
0.3
DD_
Pulse Width Distortion
PWD
|t
-t
|
PLH PHL
4.5V ≤ V
≤ 5.5V
3.7
4.3
DD_
DD_
3.0V ≤ V
≤ 3.6V
t
SPLH
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
6
DD_
10.3
3.8
Propagation Delay Skew
Part-to-Part (Same Channel)
DD_
ns
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
3.0V ≤ V
4.7
DD_
t
SPHL
2.25V ≤ V
≤ 2.75V
≤ 1.89V
6.5
DD_
DD_
1.71V ≤ V
11.5
Propagation Delay Skew
Channel-to-Channel
(Same Direction)
t
1.71V ≤ V
≤ 5.5V
≤ 5.5V
1.5
1.5
SCSLH
DD_
DD_
ns
t
1.71V ≤ V
SCSHL
Maxim Integrated
│ 6
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Dynamic Characteristics MAX1443_C/F/S/V (continued)
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 3)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
2.9
UNITS
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
DD_
3.0V ≤ V
3.4
t
SCOLH
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
4.9
DD_
DD_
Propagation Delay Skew
Channel-to-Channel
(Opposite Direction)
10.2
3.2
ns
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
3.0V ≤ V
3.8
DD_
t
SCOHL
2.25V ≤ V
1.71V ≤ V
200Mbps
≤ 2.75V
≤ 1.89V
5.3
DD_
10.9
DD_
Peak Eye Diagram Jitter
Clock Jitter RMS
T
90
ps
ps
JIT(PK)
T
500kHz Clock Input, Rising/Falling Edges
6.5
JCLK(RMS)
4.5V ≤ V
≤ 5.5V
≤ 3.6V
1.6
2.2
3
DD_
3.0V ≤ V
DD_
Rise Time
t
ns
ns
ns
ns
R
2.25V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
1.71V ≤ V
4.5
1.4
2
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
3.0V ≤ V
DD_
Fall Time
t
F
2.25V ≤ V
≤ 2.75V
≤ 1.89V
4.5V ≤ V
3.0V ≤ V
2.8
5.1
DD_
DD_
1.71V ≤ V
≤ 5.5V
≤ 3.6V
DD_
DD_
3.5
5.8
ENA to
OUT_,
ENB to
OUT_,
Enable to Data Valid
Enable to Tristate
t
EN
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
9.3
C = 15pF
L
17.4
6.4
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
ENA to
OUT_,
ENB to
OUT_,
3.0V ≤ V
DD_
9.2
t
TRI
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
12.8
19.4
C = 15pF
L
DD_
Maxim Integrated
│ 7
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Dynamic Characteristics MAX1443_B/E/R/U
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 3)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Common-Mode Transient
Immunity
CMTI
IN_ = GND_ or V
(Note 4)
kV/µs
DD_
50
Maximum Data Rate
Minimum Pulse Width
Glitch Rejection
DR
25
Mbps
ns
MAX
PW
IN_ to OUT_
IN_ to OUT_
40
MIN
10
17
29
ns
4.5V ≤ V
≤ 5.5V
≤ 3.6V
17.4
17.6
18.3
20.7
16.9
17.2
17.8
19.8
23.9
24.4
25.8
29.6
23.4
24.2
25.4
29.3
0.4
32.5
33.7
36.7
43.5
33.6
35.1
38.2
45.8
4
DD_
IN_ to
3.0V ≤ V
DD_
t
OUT_,
PLH
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
C = 15pF
L
Propagation Delay
(Figure 1)
DD_
ns
ns
ns
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
IN_ to
OUT_,
3.0V ≤ V
DD_
t
PHL
2.25V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
C = 15pF
L
1.71V ≤ V
Pulse Width Distortion
PWD
|t
-t
|
PLH PHL
4.5V ≤ V
≤ 5.5V
15.1
15
DD_
DD_
3.0V ≤ V
≤ 3.6V
t
SPLH
2.25V ≤ V
≤ 2.75V
≤ 1.89V
15.4
20.5
13.9
14.2
16
DD_
DD_
1.71V ≤ V
Propagation Delay Skew
Part-to-Part (Same Channel)
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
3.0V ≤ V
DD_
t
SPHL
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
21.8
DD_
Propagation Delay Skew
Channel-to-Channel
(Same Direction)
t
1.71V ≤ V
1.71V ≤ V
≤ 5.5V
≤ 5.5V
SCSLH
DD_
2
ns
ns
t
SCSHL
DD_
2
4.5V ≤ V
≤ 5.5V
≤ 3.6V
13.9
13.7
14.2
19.4
13
DD_
3.0V ≤ V
DD_
t
SCOLH
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
Propagation Delay Skew
Channel-to-Channel
(Opposite Direction)
DD_
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
3.0V ≤ V
12.9
14.4
20.1
DD_
t
SCOHL
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
Maxim Integrated
│ 8
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Dynamic Characteristics MAX1443_B/E/R/U (continued)
(V
- V
= 1.71V to 5.5V, V
- V
= 1.71V to 5.5V, C = 15pF, T = -40°C to +125°C, unless otherwise noted. Typical
DDA
GNDA
DDB
GNDB L A
values are at V
- V
= 3.3V, V
- V
= 3.3V, V
= V
, T = +25°C, unless otherwise noted.) (Note 3)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Peak Eye Diagram Jitter
T
25Mbps
4.5V ≤ V
3.0V ≤ V
250
ps
JIT(PK)
≤ 5.5V
≤ 3.6V
1.6
2.2
3
DD_
DD_
Rise Time (Figure 1)
Fall Time (Figure 1)
Enable to Data Valid
Enable to Tristate
t
ns
ns
ns
ns
R
2.25V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
1.71V ≤ V
4.5
1.4
2
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
DD_
3.0V ≤ V
t
F
2.25V ≤ V
≤ 2.75V
≤ 1.89V
4.5V ≤ V
3.0V ≤ V
2.8
5.1
DD_
DD_
1.71V ≤ V
≤ 5.5V
≤ 3.6V
DD_
DD_
3.5
5.8
ENA to
OUT_,
ENB to
OUT_,
t
EN
2.25V ≤ V
1.71V ≤ V
≤ 2.75V
≤ 1.89V
DD_
9.3
C = 15pF
L
DD_
17.4
6.4
4.5V ≤ V
≤ 5.5V
≤ 3.6V
DD_
ENA to
OUT_,
ENB to
OUT_,
3.0V ≤ V
DD_
9.2
t
TRI
2.25V ≤ V
≤ 2.75V
≤ 1.89V
DD_
DD_
12.8
19.4
C = 15pF
L
1.71V ≤ V
Note 1: All devices are 100% production tested at T = +25°C. Specifications over temperature are guaranteed by design.
A
Note 2: Not production tested. Guaranteed by design and characterization,
Note 3: All currents into the device are positive. All currents out of the device are negative. All voltages are referenced to their
respective ground (GNDA or GNDB), unless otherwise noted.
Note 4: 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 (V
= 1000V).
CM
ESD Protection
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ESD
Human Body Model, All Pins
±4
kV
Maxim Integrated
│ 9
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Table 1. Insulation Characteristics
PARAMETER
SYMBOL
CONDITIONS
Method B1 = V x 1.875
VALUE
2250
UNITS
IORM
Partial Discharge Test Voltage
V
V
PR
P
P
(t = 1s, partial discharge < 5pC)
Maximum Repetitive Peak
Isolation Voltage
V
(Note 5)
1200
848
V
IORM
IOWM
Maximum Working Isolation
Voltage
Continuous RMS voltage
(Note 5)
V
V
V
RMS
Maximum Transient Isolation
Voltage
V
t = 1s
8400
5000
10
V
P
IOTM
Maximum Withstand Isolation
Voltage
V
f
= 60Hz, duration = 60s (Note 6)
SW
ISO
RMS
Basic Insulation, 1.2/50µs pulse per
IEC61000-4-5
Maximum Surge Isolation Voltage
Insulation Resistance
V
kV
Ω
IOSM
12
R
V
= 500V
>10
S
IO
Barrier Capacitance Side A to
Side B
CIO
f
= 1MHz (Note 7)
2
pF
SW
Minimum Creepage Distance
Minimum Clearance Distance
Internal Clearance
CPG
CLR
8
8
mm
mm
mm
Distance through insulation
Material Group I (IEC 60112)
0.015
>600
40/125/21
Comparative Tracking Index
Climate Category
CTI
Pollution Degree
(DIN VDE 0110, Table 1)
2
Note 5: V
, V
, and V
are defined by the IEC 60747-5-5 standard.
ISO IOWM
IORM
Note 6: Product is qualified at V
for 60s and 100% production tested at 120% of V
for 1s.
ISO
ISO
Note 7: Capacitance is measured with all pins on field-side and logic-side tied together.
V
DDA
IN1, IN2
50%
50%
GNDA
0.1µF
0.1µF
t
t
PLH
PHL
V
DDA
V
DDB
V
DDA
V
DDB
V
DDB
MAX14434-36
OUT1
OUT2
50%
50%
50Ω
GNDB
IN_
OUT_
C
L
t
SCSLH
TEST
SOURCE
t
SCSHL
R
L
V
DDB
GNDA
GNDB
90%
50%
10%
50%
GNDB
(A)
t
t
F
R
(B)
Figure 1. Test Circuit (A) and Timing Diagram (B)
Maxim Integrated
│ 10
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Typical Operating Characteristics
(V
- V
= +3.3V, V
- V
= +3.3V, V
= V
, T = +25°C, unless otherwise noted.)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
SIDE A SUPPLY CURRENT
SIDE A SUPPLY CURRENT
vs. DATA RATE
SIDE A SUPPLY CURRENT
vs. DATA RATE
vs. DATA RATE
toc03
toc01
toc02
1
1
0.9
0.8
0.7
0.6
0.5
0.4
2.5
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14434C/F
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14434B/E
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14435B/E/R/U
0.9
0.8
0.7
0.6
0.5
0.4
2
1.5
1
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
0.5
0
0
5
10
15
20
25
0
5
10
15
20
25
0
25
50
75
100
125
150
DATA RATE(Mbps)
DATA RATE (Mbps)
DATA RATE (Mbps)
SIDE A SUPPLY CURRENT
vs. DATA RATE
SIDE A SUPPLY CURRENT
vs. DATA RATE
SIDE A SUPPLY CURRENT
vs. DATA RATE
toc04
toc05
toc06
2.5
2
1
2.5
2
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14435C/F/S/V
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14436C/F
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
MAX14436B/E
0.9
0.8
0.7
0.6
0.5
0.4
1.5
1
1.5
1
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
0.5
0
0.5
0
0
25
50
75
100
125
150
0
5
10
15
20
25
0
25
50
75
100
125
150
DATA RATE (Mbps)
DATA RATE (Mbps)
DATA RATE (Mbps)
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
toc07
toc08
toc09
2.6
2.2
1.8
1.4
1
2.6
2.2
1.8
1.4
1
12
10
8
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 0pF, MAX14434C/F
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 0pF, MAX14434B/E
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 15pF, MAX14434B/E
C
C
C
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
6
4
2
0.6
0.6
0
0
5
10
15
20
25
0
5
10
15
20
25
0
25
50
75
100
125
150
DATA RATE(Mbps)
DATA RATE(Mbps)
DATA RATE(Mbps)
Maxim Integrated
│
11
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Typical Operating Characteristics (continued)
(V
- V
= +3.3V, V
- V
= +3.3V, V
= V
, T = +25°C, unless otherwise noted.)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
toc11
vs. DATA RATE
toc10
2.4
toc12
12
2.4
2.1
1.8
1.5
1.2
0.9
0.6
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
2.1
1.8
1.5
1.2
0.9
0.6
CL = 0pF, MAX14435B/E/R/U
10
8
CL = 15pF, MAX14435B/E/R/U
CL = 15pF, MAX14434C/F
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 2.5V
VDDB = 3.3V
6
VDDB = 5.0V
4
2
0
0
5
10
15
20
25
0
25
50
75
100
125
150
0
5
10
15
20
25
DATA RATE(Mbps)
DATA RATE(Mbps)
DATA RATE(Mbps)
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
toc13
toc14
toc15
12
10
8
12
10
8
2.4
2.1
1.8
1.5
1.2
0.9
0.6
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 0pF, MAX14435C/F/S/V
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 15pF, MAX14435C/F/S/V
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 0pF, MAX14436B/E
C
C
C
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
6
6
4
4
2
2
0
0
0
25
50
75
100
125
150
0
25
50
75
100
125
150
0
5
10
15
20
25
DATA RATE(Mbps)
DATA RATE(Mbps)
DATA RATE(Mbps)
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
SIDE B SUPPLY CURRENT
vs. DATA RATE
toc16
toc17
toc18
2.4
2.1
1.8
1.5
1.2
0.9
0.6
12
10
8
12
10
8
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 0pF, MAX14436C/F
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 15pF, MAX14436C/F
DRIVING ONE CHANNEL ON SIDE A
OTHER CHANNELS ARE IN DEFAULT STATE
L = 15pF, MAX14436B/E
C
C
C
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
VDDB = 1.8V
VDDB = 2.5V
VDDB = 3.3V
VDDB = 5.0V
6
6
4
4
2
2
0
0
0
5
10
15
20
25
0
25
50
75
100
125
150
0
25
50
75
100
125
150
DATA RATE(Mbps)
DATA RATE(Mbps)
DATA RATE(Mbps)
Maxim Integrated
│ 12
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Typical Operating Characteristics (continued)
(V
- V
= +3.3V, V
- V
= +3.3V, V
= V
, T = +25°C, unless otherwise noted.)
DDA
GNDA
DDB
GNDB
GNDA
GNDB A
PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY
vs. VDDA VOLTAGE
toc19
toc20
toc21
40
35
30
25
20
15
15
12
9
30
25
20
15
10
5
VDDA = VDDB
INA TO OUTB, tPLH
MAX1443_B/E/R/U
VDDA = VDDB
INA TO OUTB, tPLH
MAX1443_C/F/S/V
VDDB = 3.3V
INA TO OUTB, tPLH
MAX1443_B/E/R/U
MAX1443_C/F/S/V
6
VDDA = 1.8V
VDDA = 1.8V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
VDDA = 2.5V
VDDA = 3.3V
VDDA = 5.0V
3
0
0
-50
-25
0
25
50
75
100 125
-50
-25
0
25
50
75
100 125
1.5
2.5
3.5
4.5
5.5
TEMPERATURE (⁰C)
TEMPERATURE (⁰C)
VDDA VOLTAGE (V)
PROPAGATION DELAY
vs. VDDB VOLTAGE
MINIMUM PULSE WIDTH
MINIMUM PULSE WIDTH
toc25
toc24
toc22
30
25
20
15
10
5
MAX1443_B/E/R/U
40ns PULSE
VDDA = 3.3V
INA TO OUTB, tPLH
MAX1443_C/F/S/V
5ns PULSE
IN_
IN_
1V/div
1V/div
1V/div
1V/div
MAX1443_B/E/R/U
MAX1443_C/F/S/V
OUT_
OUT_
0
1.5
2.5
3.5
4.5
5.5
5ns/div
20ns/div
VDDB VOLTAGE (V)
EYE DIAGRAM at 200Mbps
MAX1443_C/F/S/V
CLOCK JITTER RMS ON RISING EDGE
MAX1443_C/F/S/V
CLOCK JITTER RMS ON FALLING EDGE
MAX1443_C/F/S/V
toc23
toc26
toc27
500kHz Clock Input
JCLK(RMS) = 6.5ps
VDDB = 3.6V
500kHz Clock Input
JCLK(RMS) = 6.3ps
t
t
600mV/div
OUT_
OUT_
400mV/div
400mV/div
1ns/div
125ps/div
125ps/div
Maxim Integrated
│ 13
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Pin Configurations
TOP VIEW
+
+
V
1
16
15
14
1
2
3
4
5
6
7
8
16
DDB
V
V
DDA
V
DDA
DDB
MAX14434
MAX14435B/C/E/F
GNDA
IN1
2
3
4
5
6
7
8
GNDA
IN1
15
14
GNDB
OUT1
GNDB
OUT1
IN2
13 OUT2
IN2
13 OUT2
IN3
12
11
IN3
12
11
OUT3
OUT4
OUT3
IN4
IN4
OUT4
ENA
GNDA
IC
10 ENB
10 ENB
GNDA
9
GNDB
9
GNDB
SOIC
SOIC
+
+
1
16
15
14
VDDA
GNDA
IN1
1
16
15
14
VDDB
GNDB
OUT1
V
V
DDA
DDB
MAX14435R/S/U/V
MAX14436
GNDA
IN1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
GNDB
OUT1
IN2
13 OUT2
IN2
13 OUT2
IN3
12
11
10
9
OUT3
OUT4
ENA
12
11
10
9
OUT3
IN4
IN3
OUT4
ENA
GNDA
IN4
ENB
ENB
GNDB
GNDB
GNDA
SOIC
SOIC
Maxim Integrated
│ 14
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Pin Description
PIN
NAME
FUNCTION
MAX14434 MAX14435B/C/E/F MAX14435R/S/U/V MAX14436
Power Supply. Bypass V
ceramic capacitor as close as possible to the pin.
with a 0.1µF
DDA
V
1
2, 8
3
1
2, 8
3
1
2, 8
3
1
2, 8
3
DDA
GNDA
IN1
Ground Reference for Side A
Logic Input 1 on Side A, corresponds to Logic
Output 1 on Side B
Logic Input 2 on Side A, corresponds to Logic
Output 2 on Side B
IN2
IN3
4
5
4
5
4
5
4
Logic Input 3 on Side A or B, corresponds to
Logic Output 3 on Side B or A
12
11
—
7
Logic Input 4 on Side A or B, corresponds to
Logic Output 4 on Side B or A
IN4
6
11
—
7
11
—
—
7
Internally Connected. Leave unconnected or
I.C.
7
connect to GNDA or V
.
DDA
Active-High Enable for Side A. ENA has an
internal 5μA pullup to V
ENA
ENA
—
—
.
DDA
Active-Low Enable for Side A. ENA has an
internal 5μA pullup to V
—
—
DDA
OUT1
OUT2
OUT3
OUT4
14
13
12
11
14
13
12
6
14
13
12
6
14
13
5
Logic Output 1 on Side B
Logic Output 2 on Side B
Logic Output 3 on Side A or Side B
Logic Output 4 on Side A or Side B
Active-High Enable for Side B. ENB has an
6
ENB
10
10
10
10
internal 5μA pullup to V
DDB.
GNDB
9, 15
9, 15
9, 15
9, 15
Ground Reference for Side B
Power Supply. Bypass V
with a 0.1µF
DDB
V
16
16
16
16
ceramic capacitor as close as possible to the
DDB
pin.
Maxim Integrated
│ 15
www.maximintegrated.com
MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Functional Diagram
V
V
DDB
DDA
V
V
DDB
DDA
IN1
MAX14435B/C/E/F
MAX14434
ENB
ENB
OUT1
OUT1
IN1
IN2
IN3
OUT2
OUT3
OUT2
OUT3
IN2
IN3
IN4
OUT4
IN4
OUT4
GNDB
ENA
GNDB
GNDA
GNDA
V
V
DDB
DDB
V
V
DDA
DDA
MAX14435R/S/U/V
MAX14436
ENB
ENB
OUT1
IN1
IN2
OUT1
IN1
IN2
OUT2
OUT3
OUT2
IN3
IN3
OUT3
OUT4
OUT4
ENA
IN4
IN4
ENA
GNDB
GNDA
GNDB
GNDA
Maxim Integrated
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Digital Isolation
Detailed Description
The MAX14434–MAX14436 family provides galvanic iso-
lation for digital signals that are transmitted between two
ground domains. The devices withstand differences of up
The MAX14434–MAX14436 is a family of 4-channel digital
isolators. The MAX14434–MAX14436 have an isolation
rating of 5kV
. The MAX14434–MAX14436 family
RMS
to 5kV
for up to 60 seconds, and up to 1200V
offers all three possible unidirectional channel configura-
tions to accommodate any 4-channel design, including
SPI, RS-232, RS-485, and digital I/O applications. For appli-
RMS
PEAK
of continuous isolation.
Level-Shifting
2
cations requiring bidirectional channels, such as I C, see
The wide supply voltage range of both V
and V
DDB
DDA
the MAX14933 and MAX14937.
allows the MAX14434–MAX14436 family to be used for
The MAX14434 features four channels transferring digital
signals in one direction for applications such as isolated
digital I/O. The MAX14435 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 MAX14436
provides further design flexibility with two channels in each
direction for isolated RS-232 or other applications.
level translation in addition to isolation. V and V
DDA
DDB
can be independently set to any voltage from 1.71V to
5.5V. The supply voltage sets the logic level on the cor-
responding side of the isolator.
Unidirectional Channels
Each channel of the MAX14434–MAX14436 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 25Mbps (B/E/R/U versions), or from
DC to 200Mbps (C/F/S/V 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.
Devices are available in the 16-pin wide-body SOIC
package and are rated for up to 5kV
. This
RMS
family of digital isolators offers low-power 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.
Startup and Undervoltage-Lockout
Devices are available with a maximum data rate of either
25Mbps (B/E/R/U versions) or 200Mbps (C/F/S/V versions).
Each device can be ordered with default-high or default-
low outputs. The default is the state the output assumes
when the input is not powered or if the input is open circuit.
The V
and V
supplies are both internally monitored
DDA
DDB
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 while the outputs
are enabled, all outputs go to their default states regardless of
the state of the inputs (Table 2). Figure 2 through Figure
5 show the behavior of the outputs during power-up and
power-down.
The devices have two supply inputs (V
and V
)
DDA
DDB
that independently set the logic levels on either side of
the device. V and V are referenced to GNDA and
DDA
DDB
GNDB, respectively. The MAX14434–MAX14436 family
also features a refresh circuit to ensure output accuracy
when an input remains in the same state indefinitely.
Maxim Integrated
│ 17
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Table 2. Output Behavior During Undervoltage Conditions
V
V
V
ENA
ENB
V
V
IN_
DDA
DDB
OUTA
OUTB
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
Powered
Powered
Powered
Powered
Hi-Z
0
Hi-Z
0
0
X
X
Hi-Z
Hi-Z
Default
Hi-Z
Default
Hi-Z
Undervoltage
Powered
Powered
Default
Hi-Z
Default
Hi-Z
Undervoltage
Figure 2. Undervoltage Lockout Behavior (MAX1443_B/C/R/S High)
Figure 3. Undervoltage Lockout Behavior (MAX1443_E/F/U/V High)
Figure 4. Undervoltage Lockout Behavior (MAX1443_B/C/R/S Low)
Figure 5. Undervoltage Lockout Behavior (MAX1443_E/F/U/V Low)
Maxim Integrated
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Layout Considerations
Applications Information
The PCB designer should follow some critical recom-
mendations in order to get the best performance from the
design.
Power-Supply Sequencing
The MAX14434–MAX14436 do not require special power
supply sequencing. The logic levels are set independently
● Keep the input/output traces as short as possible.
Avoid using vias to make low-inductance paths for
the signals.
on either side by V
and V
. Each supply can be
DDA
DDB
present over the entire specified range regardless of the
level or presence of the other supply.
● Have a solid ground plane underneath the high-
Power-Supply Decoupling
To reduce ripple and the chance of introducing data
speed signal layer.
● Keep the area underneath the MAX14434–MAX14436
free from ground and signal planes. Any galvanic or
metallic connection between the field-side and logic-
side defeats the isolation.
errors, bypass V
and V
with 0.1μF low-ESR
DDA
DDB
ceramic capacitors to GNDA and GNDB, respectively.
Place the bypass capacitors as close to the power supply
input pins as possible.
.0
Figure 7. Supply Current Per Output Channel (Estimated)
Figure 6. Supply Current Per Input Channel (Estimated)
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV Digital Isolators
RMS
Example (shown in Figure 8): A MAX14435F is operating
with V = 2.5V, V = 3.3V, channel 1 operating at
Calculating Power Dissipation
The required current for a given supply (V
DDA
DDB
or V
)
DDB
DDA
20Mbps with a 10pF capacitive load, channel 2 held high
with a 10kΩ resistive load, and channel 4 operating at
100Mbps with a 15pF capacitive load. Channel 3 is not in
use and the resistive load is negligible since the isolator
is driving a CMOS input. Refer to Table 3 and Table 4 for
can be estimated by summing the current required for
each channel. The supply current for a channel depends
on whether the channel is an input or an output, the channel’s
data rate, and the capacitive or resistive load if it is an
output. The typical current for an input or output at any
data rate can be estimated from the graphs in Figure 6
and Figure 7. Please note the data in Figure 6 and Figure
7 are extrapolated from the supply current measurements
in a typical operating condition.
V
and V
supply current calculation worksheets.
DDA
DDB
V
must supply:
DDA
● Channel 1 is an input channel operating at 2.5V and
20Mbps, consuming 0.33mA, estimated from Figure 6.
The total current for a single channel is the sum of the
“no load” current (shown in Figure 6 and Figure 7) which
is a function of Voltage and Data Rate, and the “load
current,” which depends on the type of load. Current into
a capacitive load is a function of the load capacitance, the
switching frequency, and the supply voltage.
● Channel 2 and 3 are input channels operating at
2.5V with DC signal, consuming 0.13mA, estimated
from Figure 6.
● Channel 4 is an output channel operating at 2.5V and
100Mbps, consuming 1.02mA, estimated from Figure 7.
● I on channel 4 for 15pF capacitor at 2.5V and
CL
I
= C × f
× V
CL
L
SW DD
100Mbps is 1.875mA.
where
is the current required to drive the capacitive load.
Total current for side A = 0.33 + 0.13 × 2 + 1.02 +
1.875 = 3.485mA, typical
I
CL
C is the load capacitance on the isolator’s output pin.
L
V
must supply:
DDB
f
is the switching frequency (bits per second / 2).
SW
● Channel 1 is an output channel operating at 3.3V and
V
DD
is the supply voltage on the output side of the isolator.
20Mbps, consuming 0.42mA, estimated from Figure 7.
Current into a resistive load depends on the load resistance,
the supply voltage and the average duty cycle of the data
waveform. The DC load current can be conservatively
estimated by assuming the output is always high.
● Channel 2 and 3 are output channels operating at
3.3V with DC signal, consuming 0.18mA, estimated
from Figure 7.
● Channel 4 is an input channel operating at 3.3V and
I
= V ÷ R
DD L
100Mbps, consuming 1.13mA, estimated from Figure 6.
RL
where
is the current required to drive the resistive load.
● I on channel 1 for 10pF capacitor at 3.3V and
CL
20Mbps is 0.33mA.
I
RL
● I on channel 2 for 10kΩ resistor held at 3.3V is
RL
V
is the supply voltage on the output side of the isolator.
DD
0.33mA.
R is the load resistance on the isolator’s output pin.
L
Total current for side B = 0.42 + 0.18 × 2 + 1.13 + 0.33
+ 0.33 = 2.57mA, typical
Table 3. Side A Supply Current Calculation Worksheet
SIDE A
V
= 2.5V
DDA
IN/
OUT
Data Rate
(Mbps)
“No Load” Current
(mA)
Load Current
(mA)
Channel
Load Type
Load
1
2
3
4
IN
IN
20
0
0.33
0.13
0.13
1.02
IN
0
OUT
100
Capacitive
15pF
Total: 3.485mA
2.5V x 50MHz x 15pF = 1.875mA
Maxim Integrated
│ 20
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Table 4. Side B Supply Current Calculation Worksheet
SIDE B
V
= 3.3V
DDB
IN/
OUT
Data Rate
(Mbps)
“No Load” Current
(mA)
Load Current
(mA)
Channel
Load Type
Load
1
2
3
4
OUT
OUT
OUT
IN
20
0
Capacitive
Resistive
10pF
0.42
0.18
0.18
1.13
3.3V x 10MHz x 10pF = 0.33mA
10kΩ
3.3V / 10kΩ = 0.33mA
0
100
Total: 2.57mA
2.5V
3.3V
V
V
DDB
DDA
MAX14435F
ENB
20Mbps
20Mbps
IN1
IN2
OUT1
10pF
2.5V
OUT2
OUT3
10kΩ
IN3
100Mbps
100Mbps
IN4
OUT4
15pF
ENA
GNDB
GNDA
Figure 8. Example Circuit for Supply Current Calculation
Maxim Integrated
│ 21
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Typical Operating Circuit
2.5V
3.3V
V
V
DDB
DDA
0.1µF
0.1µF
MAX14435R/S/U/V
ENB
CS
IN1
IN2
IN3
OUT1
CS
SCLK
SCLK
OUT2
OUT3
IN4
ADC
Micro -
controller
MOSI
MISO
MOSI
MISO
OUT4
ENA
GNDB
GNDA
ISOLATED SPI INTERFACE
Maxim Integrated
│ 22
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Typical Operating Circuit (continued)
3.3V
5V
24V
V
V
DDB
DDA
MAX14434
0.1µF
0.1µF
5V VOUT
ENB
IN1
IN2
IN3
OUT1
OUT2
OUT3
IN4
OUT4
GNDB
GNDA
GPIO
PORT
24V DIGITAL I /O
3.3V
5V
WITH
5V INTERFACE
V
V
DDA
DDB
0.1µF
MAX14434
0.1µF
ENB
OUT1
IN1
OUT2
OUT3
IN2
IN3
OUT4
GNDB
IN4
GNDA
INDUSTRIAL I/O
Maxim Integrated
│ 23
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Typical Operating Circuit (continued)
2.5V
5V
V
V
DDB
DDA
MAX 14436
0.1µF
0.1µF
ENB
IN1
IN2
OUT1
T1IN
T2IN
OUT2
Micro -
MAX 13223
controller
RS-232 Transceiver
OUT3
OUT4
IN3
R1OUT
R2OUT
IN4
ENA
GNDA
GNDB
ISOLATED RS-232
Maxim Integrated
│ 24
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Ordering Information
CHANNEL
CONFIGU-
RATION
DATA
RATE
(Mbps)
ISOLATION
VOLTAGE
(kV
TEMP
RANGE
(°C)
DEFAULT
OUTPUT
ENA
Polarity
PART
PIN-PACKAGE
)
RMS
MAX14434BAWE+*
MAX14434CAWE+*
MAX14434EAWE+*
MAX14434FAWE+
MAX14435BAWE+*
MAX14435CAWE+*
MAX14435EAWE+*
MAX14435FAWE+
MAX14435RAWE+*
MAX14435SAWE+*
MAX14435UAWE+*
MAX14435VAWE+*
MAX14436BAWE+*
MAX14436CAWE+*
MAX14436EAWE+*
MAX14436FAWE+
4/0
4/0
4/0
4/0
3/1
3/1
3/1
3/1
3/1
3/1
3/1
3/1
2/2
2/2
2/2
2/2
25
200
25
Default High Active-High
Default High Active-High
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
16 Wide SOIC
Default Low
Default Low
Active-High
Active-High
200
25
Default High Active-High
Default High Active-High
200
25
Default Low
Default Low
Active-High
Active-High
200
25
Default High Active-Low
Default High Active-Low
200
25
Default Low
Default Low
Active-Low
Active-Low
200
25
Default High Active-High
Default High Active-High
200
25
Default Low
Default Low
Active-High
Active-High
200
*Future Product—Contact Maxim for availability.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Chip Information
PROCESS: BiCMOS
Maxim Integrated
│ 25
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MAX14434–MAX14436
Four-Channel, Fast, Low-Power,
5kV
Digital Isolators
RMS
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
6/17
8/17
1/18
0
1
2
Initial release
—
10
25
Updated Insulation Characteristics table
Updated Ordering Information table
Removed future product designation from MAX14434FAWE+ in the Ordering
Information table
3
1/19
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.
2019 Maxim Integrated Products, Inc.
│ 26
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