SP488 Sipex, SP488 Datasheet

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SP488

Manufacturer Part Number
SP488
Description
Quad RS-485/RS-422 Line Receivers
Manufacturer
Sipex
Datasheet

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SP488CS
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DESCRIPTION…
The SP488 and SP489 are low–power quad differential line receivers meeting RS-485 and RS-422
standards. The SP488 features a common receiver enable control; the SP489 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.
SP488/489
GND
RI
RI
RI
RI
RO
RO
EN
1
1
2
2
B
A
A
B
1
2
RS-485 or RS-422 Applications
Quad Differential Line Receivers
Tri–state Output Control
120ns Typical Receiver Propagation
Delays
–7V to +12V Common Mode Input
Range
1mA Supply Current
Single +5V Supply Operation
Pin Compatible with SN75173,
SN75175, LTC488 and LTC489
1
2
3
4
5
6
7
8
1
2
®
Quad RS-485/RS-422 Line Receivers
SP488
3
4
16
15
14
13
12
11
10
9
Quad RS-485/RS-422 Line Receivers
V
RI
RI
RO
EN
RO
RI
RI
CC
4
4
3
3
B
A
A
B
4
3
EN
1
1
GND
RI
RI
/EN
RI
RI
RO
RO
1
1
2
2
B
A
A
B
1
2
2
1
2
3
4
5
6
7
8
1
2
© Copyright 2000 Sipex Corporation
SP488/489
SP489
3
4
16
15
14
13
12
11
10
9
V
RI
RI
RO
EN
RO
RI
RI
CC
4
4
3
3
B
A
3
A
B
4
3
/EN
4

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SP488 Summary of contents

Page 1

... SN75175, LTC488 and LTC489 DESCRIPTION… The SP488 and SP489 are low–power quad differential line receivers meeting RS-485 and RS-422 standards. The SP488 features a common receiver enable control; the SP489 provides independent receiver enable controls for each pair of receivers. Both feature tri–state outputs and wide common– ...

Page 2

... Maximum Data Rate RECEIVER OUTPUTS Output Voltage High Impedance Output Current POWER REQUIREMENTS Supply Voltage Supply Current ENVIRONMENTAL AND MECHANICAL Operating Temperature –C –E Storage Temperature Package –_S –_T SP488/489 +0.5V) CC +0.5V) CC unless otherwise noted. TYP. MAX. 0.8 2 –0.2 +0.2 +1.0 –0.8 10 3.5 0 ...

Page 3

... Pin 10 — RI Pin 11 — RO Receiver 3 output is enabled 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and > 200mV, Receiver 3 output is low Pin 12 — EN — Receiver Output Enable. Please 2 refer to SP488 Truth Table (1 ...

Page 4

... Both feature tri–state outputs and a -7V to +12V common–mode input range per- mitting a 7V ground difference between de- vices on the communications bus. The SP488/ 489 are equipped with a fail–safe feature which forces a logic high at the receiver output when the input is left floating. Data rates up to 10Mbps are supported ...

Page 5

... OD Input A–B – PHL Figure 3. Receiver Propagation Delays Figure 4. Receiver Enable/Disable Timing SP488/489 TYP. MAX. UNIT 120 250 ns 120 250 150 ns 80 200 ...

Page 6

... Quad RS485 Receivers: Model ........................ Enable/Disable ...................................... Temperature Range ........................ Package SP488CS .................. Common; active Low and Active High .. +70 C .................... 16–pin Plastic DIP SP488CT .................. Common; active Low and Active High .. +70 C ............................. 16–pin SOIC SP488ES .................. Common; active Low and Active High .. – +85 C ................ 16–pin Plastic DIP SP488ET .................. Common ...

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