®
SP490E/SP491E
Enhanced Full Duplex RS-485 Transceivers
+5V Only
Low Power BiCMOS
Driver/Receiver Enable (SP491E)
RS-485 and RS-422 Drivers/Receivers
Pin Compatible with LTC490 and
SN75179 (SP490E)
s
Pin Compatible with LTC491 and
SN75180 (SP491E)
s
Improved ESD Specifications:
±15kV
Human Body Model
±15kV
IEC1000-4-2 Air Discharge
±8kV
IEC1000-4-2 Contact Discharge
DESCRIPTION…
The
SP490E
is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 10Mbps. The
SP491E
is identical to the
SP490E
with the addition of driver
and receiver tri-state enable lines. Both products feature
±200mV
receiver input sensitivity,
over wide common mode range. The
SP490E
is available in 8-pin plastic DIP and 8-pin NSOIC
packages for operation over the commercial and industrial temperature ranges. The
SP491E
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and
industrial temperature ranges.
s
s
s
s
s
NC 1
14 Vcc
13 NC
12 A
Vcc 1
R 2
R 2
8 A
R
11 B
R
REB 3
7 B
DE 4
6 Z
D 3
GND 4
10 Z
D 5
D
5 Y
D
GND 6
GND 7
9 Y
8 NC
SP490E
SP491E
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
© Copyright 2000 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
