SP490 Datasheet, PDF (1/12 Pages) Sipex Corporation – Full Duplex RS-485 Transceivers

®
SP490/SP491
Full Duplex RS-485 Transceivers
■ +5V Only
■ Low Power BiCMOS
■ Driver/Receiver Enable (SP491)
■ RS-485 and RS-422 Drivers/Receivers
■ Pin Compatible with LTC490 and
SN75179 (SP490)
■ Pin Compatible with LTC491 and
SN75180 (SP491)
DESCRIPTION
The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 5Mbps. The SP491 is identical to the SP490 with the addition of driver and
receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over
wide common mode range. The SP490 is available in 8-pin plastic DIP and 8-pin NSOIC
packages for operation over the commercial and industrial temperature ranges. The SP491
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and
industrial temperature ranges.
BLOCK DIAGRAMS
Vcc 1
8A
R2
R
7B
6Z
D3
D
5Y
GND 4
NC 1
R2
R
REB 3
DE 4
D5
D
GND 6
GND 7
14 Vcc
13 NC
12 A
11 B
10 Z
9Y
8 NC
SP490
SP491
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
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© Copyright 2004 Sipex Corporation