SP491 SIPEX [Sipex Corporation], SP491 Datasheet - Page 4

• Manufacturer Part Number: SP491
• Description: Full Duplex RS-485 Transceivers
• Manufacturer: SIPEX [Sipex Corporation]

Figure 6. Driver Propagation Delays
Figure 7. Driver Enable and Disable Times
Figure 8. Receiver Propagation Delays
Date: 05/10/04
A, B
A, B
DE
A – B
t
t
DIFFERENTIAL
DIFFERENTIAL
SKEW =
SKEW =
SKEW =
V
+3V
V
0V
5V
OH
0V
OL
R
V
V
0D2
OUTPUT
OUTPUT
OUTPUT
OUTPUT
0D2
V
DRIVER
DRIVER
| t
V
| t
V
OH
OL
DPLH -
DPLH -
PHL -
A
+
–
– V
DI DI
t
B
PLH
t
DPHL
DPHL
t
V
V
+3V
+3V
PHL
0V
O
0V
O
|
B
A
+
–
|
1.5V
V
2.3V
2.3V
O
0V
f = 1MHz; t
1/2V
1/2V
t
t
1.5V
ZH
SP490/491 Full Duplex RS-485 Transceivers
ZL
f = 1MHz; t
O
f = 1MHz; t
f = 1MHz; t
Output normally HIGH
Output normally LOW
1.5V
R
R
OUTPUT
4
< 10ns; t
INPUT
< 10ns; t
R
t
t
DPLH
DPLH
PLH
PLH
< 10ns; t
< 10ns; t
t
R
F
F
< 10ns
< 10ns
F F
t
t
t
DPHL
DPHL
PHL
PHL
PLH
< 10ns
< 10ns
1.5V
0V
© Copyright 2004 Sipex Corporation
1.5V
1.5V
0.5V
0.5V
t
t
HZ
LZ
t
F
1/2V
O