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PDF SP489CT Data sheet ( Hoja de datos )
| Número de pieza | SP489CT | |
| Descripción | Quad RS-485/RS-422 Line Receivers | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP489CT (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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®
SP488/489
Quad RS-485/RS-422 Line Receivers
s RS-485 or RS-422 Applications
s Quad Differential Line Receivers
s Tri–state Output Control
s 120ns 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 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.
RI1B 1
RI1A 2
RO1 3
EN 4
RO2 5
RI2A 6
RI2B 7
GND 8
1
2
SP488 16 VCC
RI1B 1
15 RI4B
RI1A 2
4 14 RI4A RO1 3
13 RO4 EN1/EN2 4
12 EN
RO2 5
11 RO3
RI2A 6
3
10 RI3A
RI2B 7
9 RI3B
GND 8
1
2
SP489 16 VCC
15 RI4B
4 14 RI4A
13 RO4
12 EN3/EN4
11 RO3
3 10 RI3A
9 RI3B
SP488/489
Quad RS-485/RS-422 Line Receivers
1
© Copyright 2000 Sipex Corporation
1 page  
AC PARAMETERS
V
CC
=
5V±5%;
typicals
at
25°C;
0°C
≤
T
A
≤
+70°C
unless
otherwise
noted.
PARAMETER
MIN.
PROPAGATION DELAY
Receiver Input to Output
Low to HIGH (tPLH)
High to LOW (tPHL)
Differential Receiver Skew (tSKD)
Receiver Rise Time (tR)
SP488
SP489
Receiver Fall Time (tF)
SP488
SP489
RECEIVER ENABLE
To Output HIGH
To Output LOW
RECEIVER DISABLE
From Output LOW
From Output HIGH
TYP.
120
120
13
30
30
20
20
70
80
70
70
MAX.
250
250
70
70
40
40
150
200
150
150
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CONDITIONS
CL = 15pF; Figure 1, 3
10% to 90%
90% to 10%
CL = 15pF; Figures 2 and 4
(S2 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
+VOD
Input A–B
–VOD
F = 1MHZ: tr < 10ns: tf < 10ns
0V 0V
tPHL
tPLH
RO VOH
VOL
Figure 3. Receiver Propagation Delays
1.5V
1.5V
3V
EN
0V
F = 1MHZ: tr < 10ns: tf < 10ns
1.5V
1.5V
tZL tLZ
RO 5V
VOL
RO VOH
0V
tZH
Figure 4. Receiver Enable/Disable Timing
1.5V
Output normally low
tHZ
Output normally high
1.5V
0.5V
0.5V
SP488/489
Quad RS-485/RS-422 Line Receivers
5
© Copyright 2000 Sipex Corporation
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet SP489CT.PDF ] | |
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