SI82390AD-IS Datasheet, PDF (7/38 Pages) Silicon Laboratories – 4.0 A ISODrivers with 2.5 V VDDI and Safety Features

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
Si8239x Data Sheet
System Overview
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
UD^{3 Fail-safe output when}
VDDI unpowered
X
X
H
P
P
UP
L
UD
L
VOA, VOB are actively
driven low if either
X
X
H
P
UP
P
UD
L
L
VDDA or VDDB is UP
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
UD^{3 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.
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