SI8435 SILABS [Silicon Laboratories], SI8435 Datasheet - Page 21

• Manufacturer Part Number: SI8435
• Description: TRIPLE-CHANNEL DIGITAL ISOLATOR
• Manufacturer: SILABS [Silicon Laboratories]

4.2. Input and Output Characteristics
The Si843x inputs and outputs are standard CMOS drivers/receivers. The Si844x inputs and outputs are standard
CMOS drivers/receivers. Table 12 details powered and unpowered operation of the Si84xx.
Notes:
Input
V
1. VDDI and VDDO are the input and output power supplies. V
2. X = not applicable; H = Logic High; L = Logic Low; Hi-Z = High Impedance.
3. It is recommended that the enable inputs be connected to an external logic high or low level when the Si84xx is
4. No Connect (NC) replaces EN1 on Si8430/35. No Connect replaces EN2 on the Si8435. No Connects are not internally
5. "Powered" state (P) is defined as 2.375 V < VDD < 5.5 V.
6. "Unpowered" state (UP) is defined as VDD = 0 V.
H
X
X
X
X
L
I
1,2
is the enable control input located on the same output side.
operating in noisy environments.
connected and can be left floating, tied to VDD, or tied to GND.
Input
H or NC
H or NC
H or NC
EN
X
L
L
1,2,3,4
State
VDDI
UP
UP
P
P
P
P
1,5,6
Table 12. Si84xx Operation Table
State
VDDO
UP
P
P
P
P
P
1,5,6
Output
Rev. 0.3
Hi-Z
Hi-Z
V
H
L
L
L
O
1,2
I
and V
Enabled, normal operation.
Disabled
Upon the transition of VDDI from unpowered to
powered, V
less than 1 µs.
Disabled
Upon the transition of VDDI from unpowered to
powered, V
less than 1 µs, if EN is in either the H or NC state.
O
are the respective input and output terminals. EN
O
O
returns to the same state as V
returns to the same state as V
Comments
Si8430/31/35
I
I
in
in
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