SP488A/489ADS/07

SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers

© Copyright 2000 Sipex Corporation

1

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.

SP488A and SP489A

SP488A

EN

GND

EN

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1

4

3

2

SP489A

GND

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1

4

3

2

High Speed Quad

RS-485/RS-422 Line Receivers

®