®
SP488/489
Quad RS-485/RS-422 Line Receivers
s
s
s
s
s
s
s
s
RS-485 or RS-422 Applications
Quad Differential Line Receivers
Tri–state Output Control
120ns Typical Receiver Propagation
Delays
–7V to +12V Common Mode Input
Range
1mA Supply Current
Single +5V Supply Operation
Pin Compatible with SN75173,
SN75175, LTC488 and LTC489
DESCRIPTION…
The
SP488
and
SP489
are low–power quad differential line receivers meeting RS-485 and RS-422
standards. The
SP488
features a common receiver enable control; the
SP489
provides independent
receiver enable controls for each pair of receivers. Both feature tri–state outputs and wide common–
mode input range. The receivers have a fail–safe feature which forces a logic “1” output when receiver
inputs are left floating. Both are available in 16–pin plastic DIP and SOIC packages.
RI
1
B
RI
1
A
RO
1
EN
RO
2
RI
2
A
RI
2
B
GND
1
2
3
4
5
6
7
8
SP488
1
4
16
15
14
13
12
V
CC
RI
4
B
RI
4
A
RO
4
EN
RO
3
RI
3
A
RI
3
B
RI
1
B
RI
1
A
RO
1
EN
1
/EN
2
RO
2
RI
2
A
RI
2
B
GND
1
2
3
4
5
6
7
8
SP489
1
4
16
15
14
13
12
V
CC
RI
4
B
RI
4
A
RO
4
EN
3
/EN
4
RO
3
RI
3
A
RI
3
B
2
3
11
10
9
2
3
11
10
9
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
