SI8640BA-B-IU Datasheet, PDF (26/42 Pages) Silicon Laboratories – Low-Power Quad-Channel Digital Isolators

5. Pin Descriptions
Si864x Data Sheet
Pin Descriptions
VDD1
GND1
A1
A2
A3
A4
NC
GND1
I
RF
XMITR
s
o
RF
RCVR
RF
XMITR
l
RF
RCVR
a
RF
XMITR
t
RF
RCVR
i
RF
XMITR
o
RF
RCVR
n
Si8640/45
VDD2
VDD1
GND2 _GND1
B1
A1
B2
A2
B3
A3
B4
A4
EN2/NC
EN1
GND2
GND1
I
RF
XMITR
s
o
RF
RCVR
RF
XMITR
l
a
RF
RCVR
RF
XMITR
t
RF
RCVR
i
RF
RCVR
o
RF
XMITR
n
Si8641
VDD2
VDD1
GND2
GND1
B1
B2
B3
B4
EN2
GND2
A1
A2
A3
A4
EN1
GND1
I
RF
XMITR
s
o
RF
RCVR
RF
XMITR
l
RF
RCVR
a
RF
RCVR
t
i
RRFF
XRMCIVTRR
RF
RCVR
o RF
XMITR
n
Si8642
VDD2
GND2
B1
B2
B3
B4
EN2
GND2
Name
SOIC-16 Pin#
Type
Description
V_DD1
1
Supply
Side 1 power supply.
GND1
2¹
Ground
Side 1 ground.
A1
3
Digital Input
Side 1 digital input.
A2
4
Digital Input
Side 1 digital input.
A3
5
Digital I/O
Side 1 digital input or output.
A4
6
Digital I/O
Side 1 digital input or output.
EN1/NC²
7
Digital Input
Side 1 active high enable. NC on Si8640/45.
GND1
8¹
Ground
Side 1 ground.
GND2
9¹
Ground
Side 2 ground.
EN2/NC²
10
Digital Input
Side 2 active high enable. NC on Si8645.
B4
11
Digital I/O
Side 2 digital input or output.
B3
12
Digital I/O
Side 2 digital input or output.
B2
13
Digital Output
Side 2 digital output.
B1
14
Digital Output
Side 2 digital output.
GND2
15¹
Ground
Side 2 ground.
V_DD2
16
Supply
Side 2 power supply.
Note:
1. For narrow-body devices, Pin 2 and Pin 8 GND must be externally connected to respective ground. Pin 9 and Pin 15 must also be
connected to external ground.
2. No Connect. These pins are not internally connected. They can be left floating, tied to VDD or tied to GND.
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