ADM3491
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
NC
A
CC
NC
RO
RE
B
NC
RO
1
2
3
4
5
6
7
14
13
12
11
10
9
V
V
CC
CC
ADM3491
TOP VIEW
(Not to Scale)
NC
Z
RE
A
ADM3491
TOP VIEW
DE
DE
B
DI
Y
(Not to Scale)
DI
Z
NC
NC
NC
GND
GND
Y
GND
8
NC
NC = NO CONNECT
NC = NO CONNECT
Figure 2. DIP/SOIC Pin Configuration
Figure 3. TSSOP Pin Configuration
Table 5. Pin Function Descriptions
Pin Number
Mnemonic
Description
DIP/ SOIC TSSOP
1, 8
2
2, 7, 9, 10, 13, 16 NC
No Connect.
3
4
RO
RE
Receiver Output. High when A > B by 200 mV; low when A < B by 200 mV.
3
Receiver Output Enable. When RE is low, the receiver output RO is enabled. When RE is high, the
output is high impedance. If RE is high and DE is low, the ADM3491 enters a shutdown state.
4
5
5
6
DE
DI
Driver Output Enable. A high level enables the driver differential outputs, Y and Z. A low level
places the part in a high impedance state.
Driver Input. When the driver is enabled, a logic low on DI forces Y low and Z high; a logic high
on DI forces Y high and Z low.
6, 7
9
8
GND
Y
Ground Connection, 0 V.
11
12
14
15
1
Noninverting Driver Output Y.
Inverting Driver Output Z.
Inverting Receiver Input B.
Noninverting Receiver Input A.
Power Supply, 3.3 V 0.3 V.
10
Z
11
B
12
A
13, 14
VCC
Rev. A | Page 6 of 16
ROCHESTER [ Rochester Electronics ]
