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SI88X2X Datasheet, PDF (26/45 Pages) Silicon Laboratories – Isolation of up to 5000 Vrms | |||
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Si88x2x
3.3.1. Supply Bypass
The Si88xx family requires a 0.1 µF bypass capacitor between all VDDx and their associated GNDx. The capacitor
should be placed as close as possible to the package. To enhance the robustness of a design, the user may also
include resistors (50â300 ï) in series with the inputs and outputs if the system is excessively noisy.
3.3.2. Output Pin Termination
The nominal output impedance of an isolator driver channel is approximately 50 ï, ±40%, which is a combination
of the value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving
high-impedance terminated PCB traces, output pins should be source-terminated to minimize reflections.
3.4. Fail-Safe Operating Mode
Si88xx devices feature a selectable (by ordering option) mode whereby the default output state (when the input
supply is unpowered) can either be a logic high or logic low when the output supply is powered. See Table 11 and
Table 13 for more information.
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Rev. 0.5
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