The ISOW784x is a family of high-performance, quad-channel reinforced digital
isolators with an integrated
high-efficiency power converter. The integrated DC-DC converter provides up to 650 mW of isolated
power at high efficiency and can be configured for various input and output voltage configurations.
Therefore these devices eliminate the need for a separate isolated power supply in space-constrained isolated
The ISOW784x family of devices provides high electromagnetic immunity and low emissions
while isolating CMOS or LVCMOS digital I/Os. The signal-isolation channel has a logic input and
output buffer separated by a double capacitive silicon dioxide (SiO2)
insulation barrier, whereas, power isolation uses on-chip transformers separated by thin film
polymer as insulating material. Various configurations of forward and
reverse channels are available. If the input signal is lost, the default
output is high for the ISOW784x devices without the F suffix and low for the
devices with the F suffix (see
VSI and VSO can be either VCC or VISO depending on the channel direction).
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 innovative chip design and layout techniques, electromagnetic compatibility of the device
has been significantly enhanced to ease system-level ESD, EFT, surge and emissions compliance. The
high-efficiency of the power converter allows operation at a higher ambient temperature. The device
is available in a 16-pin SOIC wide-body (SOIC-WB) DWE package.