SP488A Datasheet, PDF (1/7 Pages) Sipex Corporation – High Speed Quad RS-485/RS-422 Line Receivers

®
SP488A and SP489A
High Speed Quad
RS-485/RS-422 Line Receivers
s High Speed Versions of Sipex's
SP488 & SP489
s 30Mbps Transmission Rates
s Quad Differential Line Receivers
s RS-485 or RS-422 Applications
s Tri–state Output Control
s 30ns Typical Receiver Propagation
Delays
s –7V to +12V Common Mode Input
Range
s 1mA Supply Current
s Single +5V Supply Operation
s Pin Compatible with SN75173,
SN75175, LTC488 and LTC489
DESCRIPTION…
The SP488A and SP489A are high speed quad differential line receivers capable of
meeting the RS-485 and RS-422 protocols while running at five times the normal
transmission rates. The SP488A and SP489A are enhanced versions of Sipex's SP488
and SP489 quad RS-485/RS-422 line receivers. The SP488A features a common
receiver enable control; the SP489A provides independent receiver enable controls for each
pair of receivers. Both feature tri–state outputs and wide common–mode input range.
The receivers have a fail–safe feature which forces a logic “1” output when receiver inputs
are left floating. Both are available in 16–pin plastic DIP and SOIC packages.
RI₁B 1
RI₁A 2
1
RO₁ 3
EN 4
RO₂ 5
RI₂A 6
2
RI₂B 7
GND 8
SP488A/489ADS/07
SP488A ^{16 VCC}
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
SP489A ^{16 VCC}
15 RI₄B
4
14 RI₄A
13 RO₄
12 EN₃/EN₄
11 RO₃
3
10 RI₃A
9 RI₃B
SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers
1
© Copyright 2000 Sipex Corporation