ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Data Sheet
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
ADM3483/
ADM3485
TOP VIEW
(Not to Scale)
B
A
GND
Figure 4. ADM3483/ADM3485 Pin Configuration
V
1
2
3
4
8
7
6
5
A
B
Z
CC
ADM3488/
ADM3490
TOP VIEW
(Not to Scale)
RO
DI
GND
Y
Figure 5. ADM3488/ADM3490 Pin Configuration
NC
RO
1
2
3
4
5
6
7
14
13
12
11
10
9
V
V
CC
CC
RE
A
ADM3491
DE
TOP VIEW
B
(Not to Scale)
DI
Z
GND
GND
Y
8
NC
NC = NO CONNECT
Figure 6. ADM3491 Pin Configuration
Table 7. Pin Function Descriptions
ADM3483/ ADM3488/
ADM3485 Pin No. ADM3490 Pin No. Pin No.
ADM3491
Mnemonic Description
1
2
2
RO
Receiver Output. When enabled, if A > B by 200 mV, then RO =
high. If A < B by 200 mV, then RO = low.
2
Not applicable
3
RE
Receiver Output Enable. A low level enables the receiver output,
RO. A high level places it in a high impedance state. If RE is high
and DE is low, the device enters a low power shutdown mode.
3
4
Not applicable
4
5
DE
DI
Driver Output Enable. A high level enables the driver differential
Output A and Output B. A low level places it in a high impedance
state. If RE is high and DE is low, the device enters a low power
shutdown mode.
Driver Input. With a half-duplex part when the driver is enabled, a
logic low on DI forces A low and B high while a logic high on DI
forces A high and B low. With a full-duplex part when the driver is
enabled, a logic low on DI forces Y low and Z high while a logic
high on DI forces Y high and Z low.
3
5
4
5
6
6, 7
9
10
GND
Y
Z
Ground.
Noninverting Driver Output.
Inverting Driver Output.
Not applicable
Not applicable
6
Not applicable
8
Not applicable
7
Not applicable
12
Not applicable
11
13, 14
1, 8
A
A
B
B
VCC
NC
Noninverting Receiver Input A and Noninverting Driver Output A.
Noninverting Receiver Input A.
Inverting Receiver Input B and Inverted Driver Output B.
Inverting Receiver Input B.
Power Supply (3.3 V 0.3 V).
No Connect.
Not applicable
7
Not applicable
8
Not applicable
1
Not applicable
Rev. E | Page 8 of 20
ROCHESTER [ Rochester Electronics ]
