SP3488 Datasheet, PDF (1/9 Pages) Sipex Corporation – +3.3V Low Power Quad RS-485/RS-422 Line Receivers

®
SP3488 and SP3489
+3.3V Low Power Quad
RS-485/RS-422 Line Receivers
■ RS-485 or RS-422 Quad Differential
Line Receivers
■ Operates from a single +3.3V supply
■ Interoperable with +5.0V logic
■ Tri-state Output Control
■ -7V to +12V Common-Mode Input
Voltage Range
■ Common Driver Enable Control
(SP3488)
■ Independent Driver Enable Controls
for each pair of Drivers (SP3489)
■ Compatibility with LTC488
and SN75173 (SP3488)
■ Compatibility with LTC489
and SN75175 (SP3489)
DESCRIPTION…
The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the
specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin
compatible with Sipex's SP488 and SP489 devices as well as popular industry standards.
The SP3488 and SP3489 feature Sipex's BiCMOS process allowing low power operation
without sacrificing performance. The SP3488 and SP3489 meet the electrical specifications
of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3488 features a
common receiver enable control. The SP3489 provides independent receiver enable
controls for each pair of receivers. Both devices feature tri-state outputs and a -7V to +12V
common-mode input range. The receivers have a fail-safe feature which forces a logic "1"
output when receiver inputs are left floating.
RI1B 1
RI1A 2
1
RO1 3
EN 4
RO2 5
RI2A 6
2
RI2B 7
GND 8
SP3488 ^{16 V}CC
RI1B 1
15 RI4B
RI1A 2
1
4
14 RI4A
RO1 3
13 RO4 ^EN1^/EN2 ⁴
12 EN
RO2 5
11 RO3
RI2A 6
2
3
10 RI3A
RI2B 7
9 RI3B
GND 8
SP3489 ^{16 V}CC
15 RI4B
4
14 RI4A
13 RO4
12 EN3/EN4
11 RO3
3
10 RI3A
9 RI3B
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
1
© Copyright 2002 Sipex Corporation