MAX481E_14 Datasheet, PDF (7/16 Pages) Maxim Integrated Products – ±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers

MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
______________________________________________________________Pin Description
PIN
MAX481E/MAX483E
MAX485E/MAX487E
MAX1487E
MAX488E
MAX490E
MAX489E
MAX491E
NAME
FUNCTION
1
2
2
RO
Receiver Output: If A > B by 200mV, RO will be high;
If A < B by 200mV, RO will be low.
2
—
3
–R—E–
Receiver Output Enable. RO is enabled when ^{–R—E–} is
low; RO is high impedance when R–—E– is high.
Driver Output Enable. The driver outputs, Y and Z, are
enabled by bringing DE high. They are high imped-
3
—
4
DE
ance when DE is low. If the driver outputs are enabled,
the parts function as line drivers. While they are high
impedance, they function as line receivers if ^{–R—E–} is low.
Driver Input. A low on DI forces output Y low and out-
4
3
5
DI
put Z high. Similarly, a high on DI forces output Y high
and output Z low.
5
4
6, 7
GND
Ground
—
5
9
Y
Noninverting Driver Output
—
6
10
Z
Inverting Driver Output
6
—
—
A
Noninverting Receiver Input and Noninverting Driver
Output
—
8
12
A
Noninverting Receiver Input
7
—
—
B
Inverting Receiver Input and Inverting Driver Output
—
7
11
B
Inverting Receiver Input
8
1
14
V_CC
Positive Supply: 4.75V ≤ V_CC ≤ 5.25V
—
—
1, 8, 13
N.C.
No Connect—not internally connected
Maxim Integrated
7