SP483 SIPEX [Sipex Corporation], SP483 Datasheet - Page 6

• Manufacturer Part Number: SP483
• Description: Low Power Half-Duplex RS-485 Transceivers
• Manufacturer: SIPEX [Sipex Corporation]

Figure 6. Driver Propagation Delays
Table 1. Transmit Function Truth Table
Rev. 07/16/02
Figure 1. Driver DC Test Load Circuit
Figure 3. Driver/Receiver Timing Test Circuit
RE
X
X
X
X
DI
DE
INPUTS
3V
DE
t
DIFFERENTIAL
DIFFERENTIAL
SKEW =
SKEW =
1
1
0
1
A
B
DI CONDITION
OUTPUT
OUTPUT
OUTPUT
OUTPUT
X
X
A
B
R
DRIVER
DRIVER
| t
1
0
V
V
DIFF
DPLH -
DPLH -
A
OD
C
– V
C
L1
DI DI
No Fault
No Fault
L2
B
R
R
t
LINE
DPHL
DPHL
Fault
V
+3V
+3V
V
V
X
0V
0V
O
O
OC
B
A
+
–
|
f
SP481/485
SP481/485
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
A
B
V
O
OUTPUTS
1/2V
B
Z
Z
0
1
= 1MHz; f
O
1MHz; f
RO
15pF
1.5V
A
Z
Z
1
0
SP483
SP483
6
t
t
DPLH
DPLH
PLH
PLH
= 100kHz
t
R
Table 2. Receive Function Truth Table
100kHz ; t
Figure 2. Receiver Timing Test Load Circuit
Figure 4. Driver Timing Test Load #2 Circuit
Output
Under
Receiver
RE
Test
Output
0
0
0
1
INPUTS
t
t
DPHL
DPHL
PHL
PHL
R
< 10ns; t
C
C
L
DE
RL
0
0
0
0
Test Point
1.5V
F
500
< 10ns
< 10ns
Inputs Open
1K
© Copyright 2002 Sipex Corporation
A - B
+0.2V
-0.2V
X
t
F
S
1/2V
1/2V
S
S
1
S
2
1
2
O
OUTPUTS
1K
V
R
Z
CC
1
0
1
V
CC