SI840XI2C-KIT Silicon Laboratories Inc, SI840XI2C-KIT Datasheet - Page 14

• Manufacturer Part Number: SI840XI2C-KIT
• Description: KIT EVAL FOR SI840X
• Manufacturer: Silicon Laboratories Inc

Specifications of SI840XI2C-KIT

• Main Purpose: Interface, Digital Isolator
• Embedded: No
• Utilized Ic / Part: Si8400, Si8401, Si8405
• Primary Attributes: Assorted Bi-directional i²C Isolators
• Secondary Attributes: 2 Single Channel, 1 Dual channel isolator
• Interface Type: I2C
• Operating Supply Voltage: 2.7 V to 5.5 V
• Product: Interface Modules
• For Use With/related Products: Si840x
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1990

Si840x
3.3. Input and Output Characteristics for Non-I
The Si84xx inputs and outputs for unidirectional channels are standard CMOS drivers/receivers. The nominal
output impedance of an isolator driver channel is approximately 85 , ±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 12 details powered and unpowered operation of the Si84xx’s non-I
14
Notes:
V
I
1. VDDI and VDDO are the input and output power supplies. V
2. X = not applicable; H = Logic High; L = Logic Low.
3. Powered (P) state is defined as 3.0 V < VDD < 5.5 V.
4. Unpowered (UP) state is defined as VDD = 0 V.
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. For I
Input
X
X
H
L
5
5
1,2
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
1,3,4
VDDO State
UP
P
P
P
Table 12. Si84xx Operation Table
1,3,4
Undetermined
V
O
Output
Rev. 1.3
L
H
L
6
1,2
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
returns to the same state as V
returns to the same state as V
Comments
2
C digital channels.
I
I
in less
within