SI8600AC-B-ISR Silicon Laboratories, SI8600AC-B-ISR Datasheet - Page 20

• Manufacturer Part Number: SI8600AC-B-ISR
• Description: 3.75 kVrms 2-channel bi-directional and 1-channel uni-directional 12C digital isolator -- Channel Type: Bidirectional...
• Manufacturer: Silicon Laboratories

Si860x
4.3. Input and Output Characteristics for Non-I
The unidirectional Si86xx inputs and outputs are standard CMOS drivers/receivers. The nominal output impedance
of an isolator driver channel is approximately 50 , ±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 loads where transmission line
effects will be a factor, output pins should be appropriately terminated with controlled impedance PCB traces.
Table 14 details powered and unpowered operation of the Si86xx’s non-I
20
Notes:
V
I
1. VDDI and VDDO are the input and output power supplies. V
2. Powered (P) state is defined as 3.0 V < VDD < 5.5 V.
3. Unpowered (UP) state is defined as VDD = 0 V.
4. X = not applicable; H = Logic High; L = Logic Low.
5. Note that an I/O can power the die for a given side through an internal diode if its source has adequate current.
6. See "6.Ordering Guide" on page 26 for details. This is the selectable fail-safe operating mode (ordering option). Some
7. For I
Input
X
X
H
L
5
5
devices have default output state = H, and some have default output state = L, depending on the ordering part number
(OPN). For default high devices, the data channels have pull-ups on inputs/outputs. For default low devices, the data
channels have pull-downs on inputs/outputs.
1,4
2
C channels, the outputs for a given side go to Hi-Z when power is lost on the opposite side.
VDDI State
UP
P
P
P
1,2,3
VDDO State
UP
P
P
P
Table 14. Si86xx Operation Table
1,2,3
Undetermined
V
O
Output
H
Rev. 1.1
L
H
L
6,7
6
1,4
2
I
C Digital Channels
and V
Normal operation.
Upon transition of VDDI from unpowered to pow-
ered, V
than 1 µs.
Upon transition of VDDO from unpowered to pow-
ered, V
1 µs.
O
are the respective input and output terminals.
O
O
2
returns to the same state as V
returns to the same state as V
C digital channels.
Comments
I
I
in less
within