SI845X Datasheet, PDF (27/36 Pages) Silicon Laboratories – LOW POWER FIVE-CHANNEL DIGITAL ISOLATOR

4. Pin Descriptions (Si8450/51/52)
Si8450/51/52/55
VDD1
VDD2
VDD1
VDD2
VDD1
VDD2
A1
RF
XMITR
RF
RCVR
I
B1
A1
RF
RF
XMITR
I
RCVR
B1
A1
RF
RF
XMITR
I
RCVR
B1
A2
RF
XMITR
s
RF
RCVR
o
B2
A2
RF
XMITR
s
RF
RCVR
o
B2
A2
RF
XMITR
s
RF
RCVR
o
B2
A3
RF
XMITR
l
RF
RCVR
a
B3
A3
RF
XMITR
l
RF
RCVR
a
B3
A3
RF
XMITR
l
RF
RCVR
a
B3
A4
A5
NC
d _GND1
RF
XMITR
t
RF
RCVR
i
RF
XMITR
o
RF
RCVR
n
Si8450
B4
A4
B5
A5
EN2/NC
EN1
GND2
GND1
RF
XMITR
t
RF
RCVR
i
RF
RCVR
o
RF
XMITR
n
Si8451
B4
A4
B5
A5
EN2
EN1
GND2
GND1
RF
RCVR
RF
RCVR
t
RRFF
XRMCIVTRR
i
o RF
XMITR
n
Si8452
de _Name
n _{s VDD1}
e _{n A1}
A2
m _{ig A3}
m ^s _A4
o ^e _A5
c ^D _EN1/NC*
e _GND1
R ^{w GND2}
t ^{e EN2}
o ^{N B5}
B4
N _{for B3}
SOIC-16 Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
Type
Supply
Digital Input
Digital Input
Digital Input
Digital I/O
Digital I/O
Digital Input
Ground
Ground
Digital Input
Digital I/O
Digital I/O
Digital Output
Description
Side 1 power supply.
Side 1 digital input.
Side 1 digital input.
Side 1 digital input.
Side 1 digital input or output.
Side 1 digital input or output.
Side 1 active high enable. NC on Si8450.
Side 1 ground.
Side 2 ground.
Side 2 active high enable.
Side 2 digital input or output.
Side 2 digital input or output.
Side 2 digital output.
B4
B5
EN2
GND2
B2
14
Digital Output Side 2 digital output.
B1
15
Digital Output Side 2 digital output.
V_DD2
16
Supply
Side 2 power supply.
*Note: No Connect. These pins are not internally connected. They can be left floating, tied to V_DD or tied to GND.
Rev. 1.5
27