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Documents ISO7520C, ISO7521C
SLLSE39E – JUNE 2010 – REVISED MAY 2015 ISO752xC Low-Power 5 kVRMS Dual-Channel Digital Isolators
1 Features 3 Description The ISO7520C and ISO7521C provide galvanic
isolation of up to 4243 VRMS for 1 minute per UL and
6000 VPK per VDE. These devices are also certified
to 5000 VRMS reinforced insulation per end equipment
standards IEC 60950-1, IEC 61010-1, and IEC
60601-1. These digital isolators have two isolated
channels with unidirectional (ISO7520C) and
bidirectional (ISO7521C) channel configurations.
Each isolation channel has a logic input and output
buffer separated by a silicon oxide (SiO2) insulation
barrier. Used in conjunction with isolated power
supplies, these devices prevent noise currents on a
data bus or other circuits from entering the local
ground and interfering with or damaging sensitive
circuitry. The devices have TTL input thresholds and
can operate from 3.3-and 5-V supplies. All inputs are …
