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Si82396AD-IS Datasheet(PDF) 7 Page - Silicon Laboratories |
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Si82396AD-IS Datasheet(HTML) 7 Page - Silicon Laboratories |
7 / 38 page 2.2.1 Device Behavior The following are truth tables for the Si8239x families. Table 2.1. Si82390/1 Dual Drivers Enhanced UVLO and Status VIA VIB EN1 VDDI VDDA VDDB VOA VOB RDY Notes H L H P2 P P H L H L H H P P P L H H H H H P P P H H H L L H P P P L L H X X L/NC P P P L L H Device disabled X X X UP2 P P L L UD3 Fail-safe output when VDDI unpowered X X H P P UP L UD L VOA, VOB are actively driven low if either VDDA or VDDB is UP X X H P UP P UD L L Note: 1. The EN pin needs to be pulled down with a 100 kΩ resistor externally to GND. 2. The chip can be powered through the VIA,VIB input ESD diodes even if VDDI is unpowered. It is recommended that inputs be left unpowered when VDDI is unpowered. The EN pin has a special ESD circuit that prevents the IC from powering up through the EN pin. 3. UD = undetermined if same side power is UP. Table 2.2. Si82395/6 Dual Drivers with UVLO Status VIA VIB EN1 VDDI VDDA VDDB VOA VOB RDY Notes H L H P P P H L H L H H P P P L H H H H H P P P H H H L L H P P P L L H X X L/NC P P P L L H Device disabled X X X UP2 P P L L UD3 Fail-safe output when VDDI unpowered H X H P P UP H UD L VOA depends on VDDA state L X H P P UP L UD L X H H P UP P UD H L VOB depends on VDDB state X L H P UP P UD L L Note: 1. The EN pin needs to be pulled down with a 100 kΩ resistor externally to GND. 2. The chip can be powered through the VIA,VIB input ESD diodes even if VDDI is unpowered. It is recommended that inputs be left unpowered when VDDI is unpowered. The EN pin has a special ESD circuit that prevents the IC from powering up through the EN pin. 3. UD = undetermined if same side power is UP. Si8239x Data Sheet System Overview silabs.com | Smart. Connected. Energy-friendly. Rev. 0.9 | 6 |
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