The ISO734x-Q1 family
of devices provides galvanic isolation up to 3000 VRMS for 1 minute per UL
1577 and 4242 VPK per VDE V 0884-10. These devices have four isolated
channels comprised of logic input and output buffers separated by a silicon dioxide
(SiO2) insulation barrier.
The ISO7340-Q1 device
has four channels in forward direction, the ISO7341-Q1 device has three forward and one reverse-direction channels, and
the ISO7342-Q1 device has two
forward and two reverse-direction channels. In case of input power or signal loss, the default
output is low for orderable part numbers with suffix F and
high for orderable part numbers without suffix F.
See the Device Functional Modes section for further
Used in conjunction with isolated power supplies, these devices help prevent noise
currents on a data bus or other circuits from entering the local ground and interfering with or
damaging sensitive circuitry. The ISO734x-Q1 device has integrated noise filter for harsh industrial
environment where short noise pulses may be present at the device input pins. The
ISO734x-Q1 device has TTL input
thresholds and operates from 3-V to 5.5-V supply levels. Through innovative chip design and layout
techniques, electromagnetic compatibility of the ISO734x-Q1 family of devices has been significantly enhanced to enable
system-level ESD, EFT, surge, and emissions compliance.
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