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SP483CN Datasheet(PDF) 6 Page - Sipex Corporation

Part # SP483CN
Description  Low Power Half-Duplex RS-485 Transceivers
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP483CN Datasheet(HTML) 6 Page - Sipex Corporation

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6
Rev. 07/16/02
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
© Copyright 2002 Sipex Corporation
Figure 6. Driver Propagation Delays
A
VOD
VOC
B
R
R
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
Figure 3. Driver/Receiver Timing Test Circuit
Figure 4. Driver Timing Test Load #2 Circuit
CRL
1K
S2
S1
VCC
1K
Test Point
Receiver
Output
B
A
DI
B
A
CL1
CL2
RDIFF
DE
3V
RO
15pF
S2
S1
VCC
CL
500
Output
Under
Test
INPUTS
OUTPUTS
LINE
RE
DE
DI CONDITION
B
A
X1
1
No Fault
0
1
X1
0
No Fault
1
0
X0
X
X
ZZ
X1
X
Fault
Z
Z
INPUTS
OUTPUTS
RE
DE
A - B
R
00
+0.2V
1
00
-0.2V
0
00
Inputs Open
1
10
X
Z
Table 1. Transmit Function Truth Table
Table 2. Receive Function Truth Table
+3V
+3V
0V
DI
DI
B
A
DRIVER
DRIVER
OUTPUT
OUTPUT
VO+
DIFFERENTIAL
DIFFERENTIAL
OUTPUT
OUTPUT
VA – VB
0V
VO
1.5V
1.5V
tPLH
PLH
tR
tF
VO
1/2VO
1/2V
1/2VO
tPHL
PHL
tDPLH
DPLH
tDPHL
DPHL
tSKEW =
SKEW =
| tDPLH -
DPLH - tDPHL
DPHL
|
fSP481/485
SP481/485 = 1MHz; f
1MHz; fSP483
SP483 = 100kHz
100kHz ; tR < 10ns; tF < 10ns
< 10ns


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