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
7
B
6
Z
5
Y
SP1490E
8 Pin
-
nSOIC
8 Pin nSOIC
aPPLicationS
■ Industial Networks
■ Motor Control
■ Telecom
■ 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 an 8-pin NSOIC packages for operation over the commercial and
industrial temperature ranges. The SP1491E is available in a 14-pin NSOIC packages for operation
over the commercial and industrial temperature ranges.
BLocK diaGraM
Vcc 1
RO 2
NC 1
8 A
RO 2
RE B 3
DE 4
DI 5
GND 6
GND 7
14 Vcc
13 NC
12 A
R
7 B
6 Z
R
11 B
DI 3
GND 4
D
5 Y
10 Z
D
9 Y
8 NC
SP1490E
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP1491E
SP1490_SP1491E_100_061209
1
EXAR [ EXAR CORPORATION ]
