20µA,
1
⁄
8
-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
______________________________________________________________Pin Description
PIN
MAX1482
DIP/SO
2
MAX1483
DIP/SO
µMAX
1
3
NAME
FUNCTION
Receiver Output. With the receiver output enabled (RE low), RO is high if
A > B by 200mV or when A and B are not connected, and RO is low if A < B
by 200mV.
Receiver Output Enable. When RE is low, RO is enabled. When RE is high, RO
is high impedance. If RE is high and DE is low, the MAX1482/MAX1483 enter
a low-power (0.1µA) shutdown state.
Driver Output Enable. The driver outputs, A and B, (Y and Z for the MAX1482)
are enabled by bringing DE high. When DE is low, the driver outputs are high
impedance, and the devices can function as line receivers if RE is low. If RE is
high and DE is low, the parts will enter a low-power (0.1µA) shutdown state. If
the driver outputs are enabled, the devices function as line drivers.
Driver Input. With DE high, a low on DI forces output Y low and output Z high,
and a high on DI forces output Y high and output Z low.
Ground
Noninverting Driver Output
Inverting Driver Output
Noninverting Receiver Input and Noninverting Driver Output
Noninverting Receiver Input
Inverting Receiver Input and Inverting Driver Output
Inverting Receiver Input
Positive Supply: 4.75V to 5.25V
No Connect—not internally connected
MAX1482/MAX1483
RO
3
2
4
RE
4
3
5
DE
5
6, 7
9
10
—
12
—
11
14
1, 8, 13
4
5
—
—
6
—
7
—
8
—
6
7
—
—
8
—
1
—
2
—
DI
GND
Y
Z
A
A
B
B
V
CC
N.C.
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
