Data Sheet ADuM7640/ADuM7641/ADuM7642/ADuM7643
Rev. 0 | Page 13 of 20
*PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED.
CONNECTING BOTH PINS TO PCB SIDE 1 GROUND
IS RECOMMENDED. PIN 11 AND PIN 19 ARE
INTERNALLY CONNECTED. CONNECTING BOTH
PINS TO PCB SIDE 2 GROUND IS RECOMMENDED.
1
2
3
4
20
19
18
17
5 16
6 15
7 14
9 12
10 11
8 13
ADuM7642
TOP VIEW
(Not to Scale)
V
DD1A
GND
1
*
V
IA
V
IB
V
IC
V
OD
V
DD1B
V
OE
V
IF
GND
1
*
V
DD2A
GND
2
*
V
OA
V
OB
V
OC
V
ID
V
DD2B
V
IE
V
OF
GND
2
*
10448-008
Figure 8. ADuM7642 Pin Configuration
Table 22. ADuM7642 Pin Function Descriptions
Pin No. Mnemonic Description
1 V
DD1A
Supply Voltage A for Isolator Side 1 (3.0 V to 5.5 V). Pin 1 must be connected externally to Pin 7. Connect a 0.01 µF to
0.1 µF between V
DD1A
(Pin 1) and GND
1
(Pin 2).
1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
3 V
IA
Logic Input A.
4 V
IB
Logic Input B.
5 V
IC
Logic Input C.
6 V
OD
Logic Output D.
7 V
DD1B
Supply Voltage B for Isolator Side 1 (3.0 V to 5.5 V). Pin 7 must be connected externally to Pin 1. Connect a 0.01 µF to
0.1 µF between V
DD1B
(Pin 7) and GND
1
(Pin 10).
8 V
OE
Logic Output E.
9 V
IF
Logic Input F.
10 GND
1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
11 GND
2
Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
12 V
OF
Logic Output F.
13 V
IE
Logic Input E.
14 V
DD2B
Supply Voltage B for Isolator Side 2 (3.0 V to 5.5 V). Pin 14 must be connected externally to Pin 20. Connect a 0.01 µF
to 0.1 µF between V
DD2B
(Pin 14) and GND
2
(Pin 11).
15 V
ID
Logic Input D.
16 V
OC
Logic Output C.
17 V
OB
Logic Output B.
18 V
OA
Logic Output A.
19 GND
2
Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
20 V
DD2A
Supply Voltage A for Isolator Side 2 (3.0 V to 5.5 V). Pin 20 must be connected externally to Pin 14. Connect a 0.01 µF
to 0.1 µF between V
DD2A
(Pin 20) and GND
2
(Pin 19).
Reference the AN-1109 Application Note for specific layout guidelines.
