ISOW7740, ISOW7741, ISOW7742, ISOW7743, ISOW7744
SLLSFK1B – SEPTEMBER 2021 – REVISED JANUARY 2022
ISOW774x Quad-Channel Digital Isolator with Integrated Low-Emissions, Low-Noise
DC-DC Converter
1 Features
2 Applications
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100 Mbps data rate
Integrated DC-DC converter with low-emissions,
low-noise
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Factory automation
Motor control
Grid infrastructure
Medical equipment
Test and measurement
– Emission optimized to meet CISPR 32 and EN
55032 Class B with >5 dB margin on 2 layer
board
– Low frequency power converter at 25 MHz
enabling low noise performance
– Low output ripple: 24 mV
High efficiency output power
– Efficiency at max load: 46%
– Up to 0.55-W output power
– VISOOUT accuracy of 5%
– 5 V to 5 V: Max available load current = 110 mA
– 5 V to 3.3 V: Max available load current = 140
mA
– 3.3 V to 3.3 V: Max available load current = 60
mA
3 Description
The ISOW77xx family of devices are galvanically-
isolated quad-channel digital isolator with an
integrated high-efficiency power converter with low
emissions. The integrated DC-DC converter provides
up to 550 mW of isolated power, eliminating the
need for a separate isolated power supply in space-
constrained isolated designs.
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Device Information
ISOW774x
ISOW774xB
FEATURE
ISOW774xF
ISOW774xFB
Protection Level
Surge Test Voltage
Isolation Rating
Reinforced
10 kVPK
Basic
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Independent power supply for channel isolator &
power converter
7.8 kVPK
5000 VRMS
5000 VRMS
– Logic supply (VIO): 1.71-V to 5.5-V
– Power converter supply (VDD): 3-V to 5.5-V
Robust electromagnetic compatibility (EMC)
– System-level ESD, EFT, and surge immunity
– ±8 kV IEC 61000-4-2 contact discharge
protection across isolation barrier
1000 VRMS
1500VPK
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1000 VRMS
1500VPK
/
Working Voltage
Package
DFM (20)
DFM (20)
12.83 mm × 7.5
mm
12.83 mm × 7.5
mm
Body Size (Nom)
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Reinforced and Basic isolation options
High CMTI: 100-kV/µs (typical)
Safety Related Certifications (Planned):
VISOIN
VIO
EN_IO2
OUTA
– VDE reinforced and basic insulation per DIN
VDE V 0884-11:2017-01
– UL 1577 component recognition program
– IEC 62368-1, IEC 61010-1, IEC 60601-1 and
GB 4943.1-2011 certifications
Tx
Tx
INA
INB
Rx
Rx
Rx
Tx
OUTB
OUTC
IND
INC
Tx
Rx
OUTD
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Extended temperature range: –40°C to +125°C
20-pin wide body SOIC package
EN_IO1
GNDIO
GISOIN
GND1
GN
D2
VSEL
VDD
DC-DC
Primary
DC-DC
Secondary
EN/FLT
GND1
VISOOUT
GND2
ISOW7741 Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.