ISO7631F and ISO7641F provide galvanic isolation up to 4242 VPK per VDE. ISO7631F has 3 channels with two in forward and one in reverse direction whereas ISO7641F has 4 channels with three in forward and one in reverse direction. Suffix F indicates that output defaults to Low-state in fail-safe conditions. M-Grade devices are high speed isolators capable of 150 Mbps data rate with fast propagation delays whereas C-Grade devices can run up to 25 Mbps data rate with low power consumption and integrated filters for noise-prone applications. C-Grade devices are recommended for lower speed applications where input noise pulses of less than 6 ns duration need to be suppressed or lower power consumption is critical.
Each isolation 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 circuits from entering the local ground and interfering with or damaging sensitive circuitry. The devices have TTL input thresholds and can operate from 2.7 V (M-Grade), 3.3 V and 5 V supplies. All inputs are 5 V tolerant when supplied from 3.3 V or 2.7 V supplies.