®
Preliminary SP1490E/SP1491E
Full Duplex RS-485 Transceivers
FEATURES
■
+5V Only
■
Low Power BiCMOS
■
Driver/Receiver Enable (SP1491E)
■
RS-485 and RS-422 Drivers/Receivers
■
Pin Compatible with SN75179
(SP1490E)
■
Pin Compatible with SN75180
(SP1491E)
■
Improved ESD Specifications
±15kV
Human Body Model
±15kV
IEC1000-4-2 Air Discharge
±8kV
IEC1000-4-2 Contact Discharge
VCC
1
RO
2
DI
3
GND
4
8
A
SP1490E
8 Pin - nSOIC
7
B
6
5
Z
Y
APPLICATIONS
■
Industial Networks
■
Telecom
■
Motor Control
■
HVAC/ Building Control
DESCRIPTION
The
SP1490E
is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 20Mbps. The
SP1491E
is identical to the
SP1490E
with the addition of driver
and receiver tri-state enable lines. Both products feature
±200mV
receiver input sensitivity,
over wide common mode range. The
SP1490E
is available in 8-pin plastic DIP and 8-pin
NSOIC packages for operation over the commercial and industrial temperature ranges. The
SP1491E
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the
commercial and industrial temperature ranges.
BLOCK DIAGRAM
NC 1
Vcc 1
RO 2
8 A
14 Vcc
13 NC
12 A
R
RO 2
7 B
REB 3
6 Z
DE 4
R
11 B
DI 3
GND 4
D
5 Y
DI 5
GND 6
GND 7
10 Z
D
9 Y
8 NC
SP1490E
SP1491E
Date: 5/18/04
SP1490E/1491E Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
