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Documents ISO7420E, ISO7420FE, ISO7421E, ISO7421FE
SLLSE45F – DECEMBER 2010 – REVISED JULY 2015 ISO742x Low-Power Dual Channel Digital Isolators
1 Features 3 Description ISO742x provide galvanic isolation up to 2500 VRMS
for 1 minute per UL and 4242 VPK per VDE. These
devices have two isolated channels. Each channel
has a logic input and output buffer separated by a
silicon dioxide (SiO2) insulation barrier. Used in
conjunction with isolated power supplies, these
devices prevent noise currents on a data bus or other
circuit from entering the local ground and interfering
with or damaging sensitive circuitry. ISO7420 has
both channels in the same direction while ISO7421
has the two channels in opposite direction. In case of
input power or signal loss, default output is 'low' for
devices with suffix 'F' and 'high' for devices without
suffix 'F'. ISO742x have no integrated noise filter and
thus have fast propagation delays. 1 Signaling Rate > 50 Mbps
Default Output 'High' and 'Low' Options …
