ADM3491 Analog Devices, ADM3491 Datasheet - Page 5

• Manufacturer Part Number: ADM3491
• Description: 3.3 V/ Full Duplex/ 840 uA 20 Mbps/ EIA RS-485 Transceiver
• Manufacturer: Analog Devices

Mnemonic
Pin
NC
RO
RE
DE
DI
GND
Y
Z
B
A
V
REV. 0
CC
DIP/
SOIC
1, 8
2
3
4
5
6, 7
9
10
11
12
13, 14
TSSOP
2, 7, 9, 10,
13, 16
3
4
5
6
8
11
12
14
15
1
Function
No Connect.
Receiver Output. High when A > B by 200 mV or Low when A < B by 200 mV.
Receiver Output Enable. With RE low, the receiver output RO is enabled. With RE high,
the output goes high impedance. If RE is high and DE low, the ADM3491 enters a
shutdown state.
Driver Output Enable. A high level enables the driver differential outputs, Y and Z. A low
level places it in a high impedance state.
Driver Input. 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.
Ground Connection, 0 V.
Noninverting Driver Output Y.
Inverting Driver Output Z.
Inverting Receiver Input B.
Noninverting Receiver Input A.
Power Supply, 3.3 V
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATION
GND
GND
GND
V
NC
RO
RE
DE
RO
NC
NC
RE
DE
CC
DI
DI
NC = NO CONNECT
NC = NO CONNECT
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
DIP/SOIC
(Not to Scale)
(Not to Scale)
TSSOP
ADM3491
TOP VIEW
ADM3491
TOP VIEW
–5–
0.3 V.
14
13
12
11
10
16
15
14
13
12
11
10
9
8
9
V
V
A
B
Z
Y
NC
Z
NC
A
B
NC
Y
NC
NC
CC
CC
ADM3491