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PDF MAX14850 Data sheet ( Hoja de datos )
| Número de pieza | MAX14850 | |
| Descripción | Six-Channel Digital Isolator | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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EVALUATION KIT AVAILABLE
MAX14850
Six-Channel Digital Isolator
General Description
The MAX14850 is a six-channel digital isolator utilizing
Maxim’s proprietary process technology, whose monolithic
design provides a compact and low-cost transfer of digital
signals between circuits with different power domains. The
technology enables low power consumption and stable
high-temperature performance.
The four unidirectional channels are each capable of DC
to 50Mbps, with two of the four channels passing data
across the isolation barrier in each direction. The two
bidirectional channels are open-drain; each capable of
data rates from DC to 2Mbps.
Independent 3.0V to 5.5V supplies on each side of the
isolator also make it suitable for use as a level translator.
The MAX14850 can be used for isolating SPI buses, I2C
buses, RS-232, RS-485/RS-422 buses, and general-pur-
pose isolation. When used as a bus isolator, extra chan-
nels are available for power monitoring and reset signals.
The MAX14850 is available in a narrow body,16-pin SOIC
(10mm x 4mm) package (for which an evaluation kit is
available) and 16-pin QSOP (3.9mm x 4.94mm) package.
The packages are specified over the -40NC to +125NC
automotive temperature range.
Applications
●● Industrial Control Systems
●● I2C, SPI, SMBus, PMBusK Interfaces
●● Isolated RS-232, RS-485/RS-422
●● Telecommunication Systems
●● Battery Management
●● Medical Systems
Benefits and Features
●● Protection from High-Voltage Environments
• 600VRMS Isolation for 60 Seconds
• Short-Circuit Protection on Unidirectional Outputs
• 200VRMS Working Isolation Voltage for 50 Years
●● Complete Digital Isolation Solution
• Four Unidirectional Signal Paths: 2-In/2-Out
• Two Bidirectional Open-Drain Signal Paths
• 50Mbps (max) Unidirectional Data Rate
• 2Mbps (max) Bidirectional Data Rate
●● Compatible with Many Interface Standards
• I2C
• SPI
• RS-232, RS-422/RS-485
• SMBus, PMBus Interfaces
Ordering Information appears at end of data sheet.
Typical Operating Circuits
3.3V
0.1µF
0.1µF
VCCA VCCB
5V
RPUA
RPUA
MAX14850
GPIO1
GPIO2
µC SCLK
MOSI
MISO
GPIO3
VCCB MONITOR
I/OA1
I/OA2
INA1
INA2
OUTA1
OUTA2
I/OB1
I/OB2
OUTB1
OUTB2
INB1
INB2
GNDA GNDB
RPUB
RPUB
RST
CS
SCLK ADC
MOSI
MISO
PMBus is a trademark of SMIF, Inc.
600VRMS
ISOLATION
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s
website at www.maximintegrated.com.
19-6161; Rev 2; 11/14
1 page  
MAX14850
Six-Channel Digital Isolator
ELECTRICAL CHARACTERISTICS (continued)
(VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at
VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, and TA = +25°C.) (Note 2)
PARAMETER
Channel-to-Channel
Skew (Notes 3, 8)
Part-to-Part Skew
(Notes 3, 8)
Rise Time (Note 3)
Fall Time (Note 3)
SYMBOL
tDSKEWCC
CONDITIONS
OUTB1 to OUTB2 output
skew, Figure 1
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
OUTA1 to OUTA2 output
skew, Figure 1
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
I/OB1 to I/OB2 output
skew, Figure 2
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
I/OA1 to I/OA2 output
skew, Figure 2
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
MIN
TYP
MAX
3
3
3
3
6
5
20
20
tDSKEWPP
tR
tF
DtDPLH, DtDPHL
OUTA1, OUTA2, OUTB1, OUTB2, 10% to 90%,
Figure 1
OUTA1, OUTA2, OUTB1, OUTB2, 90% to 10%,
Figure 1
I/OA1, I/OA2, 90% to
10%, R1 = 1.6kW, R2 =
180W, CL1 = CL2 = 15pF,
Figure 2
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
I/OB1, I/OB2, 90% to
10%, R1 = 1kW, R2 =
120W, CL1 = CL2 = 15pF,
Figure 2
VCCA = VCCB =
+3.3V
VCCA = VCCB = +5V
8
5
5
30 60
40 80
36
35
UNIT
ns
ns
ns
ns
Maxim Integrated
5
5 Page 
MAX14850
Pin Configuration
Six-Channel Digital Isolator
TOP VIEW
VCCA 1
INA1 2
INA2 3
OUTA1 4
OUTA2 5
I/OA1 6
I/OA2 7
GNDA 8
+
MAX14850
16 VCCB
15 OUTB1
14 OUTB2
13 INB1
12 INB2
11 I/OB1
10 I/OB2
9 GNDB
SOIC/QSOP
Pin Description
PIN NAME
1 VCCA
2 INA1
3 INA2
4 OUTA1
5 OUTA2
6 I/OA1
7 I/OA2
8 GNDA
9 GNDB
10 I/OB2
FUNCTION
Supply Voltage of Logic Side A. Bypass VCCA with a 0.1FF ceramic
capacitor to GNDA.
Logic Input 1 on Side A. INA1 is translated to OUTB1.
Logic Input 2 on Side A. INA2 is translated to OUTB2.
Logic Output 1 on Side A. OUTA1 is a push-pull output.
Logic Output 2 on Side A. OUTA2 is a push-pull output.
Bidirectional Input/Output 1 on Side A. I/OA1 is translated to/from I/OB1
and is a open-drain output.
Bidirectional Input/Output 2 on Side A. I/OA2 is translated to/from I/OB2
and is a open-drain output.
Ground Reference for Side A
Ground Reference for Side B
Bidirectional Input/Output 2 on Side B. I/OB2 is translated to/from I/OA2
and is a open-drain output.
VOLTAGE RELATIVE TO
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
—
—
GNDB
Maxim Integrated
11
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| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MAX14850.PDF ] | |
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