1 Features
• 100Mbps data rate
• Robust isolation barrier:
– >30-year projected lifetime at 1500VRMS
working voltage
– Up to 5000VRMS isolation rating
– Up to 12.8kV surge capability
– ±100kV/μs typical CMTI
• Wide supply range: 2.25V to 5.5V
• 2.25V to 5.5V level translation
• Default output high (ISO774x ) and low
(ISO774xF) options
• Wide temperature range: –55°C to 125°C
• Low power consumption, typical 1.5mA per
channel at 1Mbps
• Low propagation delay: 10.7ns typical
(5V Supplies)
• Robust electromagnetic compatibility (EMC)
– System-level ESD, EFT, and surge immunity
– ±8kV IEC 61000-4-2 contact discharge
protection across isolation barrier
– Low emissions
• Wide-SOIC (DW-16) and QSOP (DBQ-16)
package options
• Automotive version available: ISO774x-Q1
• Safety-related certifications:
– DIN EN IEC 60747-17 (VDE 0884-17)
– UL 1577 component recognition program
– IEC 61010-1, IEC 62368-1, IEC 60601-1, and
GB 4943.1 certifications

2 Applications
• Industrial automation
• Motor control
• Power supplies
• Solar inverters
• Medical equipment

3 Description
The ISO774x devices are high-performance, quad-channel digital isolators with 5000VRMS (DW package) and
3000VRMS (DBQ package) isolation ratings per UL 1577. This family includes devices with reinforced insulation
ratings according to VDE, CSA, TUV and CQC. The ISO7741B device is designed for applications that require
basic insulation ratings only.
The ISO774x devices provide high electromagnetic immunity and low emissions at low power consumption,
while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer
separated by a double capacitive silicon dioxide (SiO2) insulation barrier. These devices come with enable pins
which can be used to put the respective outputs in high impedance for multi-controller driving applications and
to reduce power consumption. The ISO7740 device has all four channels in the same direction, the ISO7741
device has three forward and one reverse-direction channels, and the ISO7742 device has two forward and two
reverse-direction channels. If the input power or signal is lost, default output is high for devices without suffix F
and low for devices with suffix F. See the Device Functional Modes section for further details.
Used in conjunction with isolated power supplies, these devices help prevent noise currents on data buses, such
as RS-485, RS-232, and CAN, or other circuits from entering the local ground and interfering with or damaging
sensitive circuitry. Through remarkable chip design and layout techniques, electromagnetic compatibility of the
ISO774x devices significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The
ISO774x devices are available in 16-pin SOIC and QSOP packages.