參數(shù)資料
型號(hào): SP490
英文描述: Full Duplex RS-485 Transceivers(全雙工RS-485收發(fā)器(不帶收發(fā)使能))
中文描述: 全雙工RS - 485接口收發(fā)器(全雙工RS - 485接口收發(fā)器(不帶收發(fā)使能))
文件頁(yè)數(shù): 4/10頁(yè)
文件大?。?/td> 94K
代理商: SP490
4
SP490/491DS/09
SP490/491 Full Duplex RS-485 Transceivers
Copyright 2000 Sipex Corporation
Figure 6. Driver Propagation Delays
+3V
0V
DE
5V
V
OL
A, B
0V
1.5V
1.5V
t
ZL
t
ZH
f = 1MHz; t
R
< 10ns; t
F
< 10ns
V
OH
A, B
2.3V
2.3V
t
LZ
t
HZ
0.5V
0.5V
Output normally LOW
Output normally HIGH
Figure 7. Driver Enable and Disable Times
Figure 8. Receiver Propagation Delays
+3V
0V
DI
B
A
DRIVER
OUTPUT
V
O
V
O
DIFFERENTIAL
OUTPUT
V
A
+
– V
B
0V
1.5V
1.5V
t
PLH
t
R
t
F
f = 1MHz; t
R
< 10ns; t
F
< 10ns
V
O
1/2V
O
1/2V
O
t
PHL
t
DPLH
t
DPHL
t
SKEW =
|
t
DPLH -
t
DPHL
|
V
OH
V
OL
R
1.5V
1.5V
t
PHL
f = 1MHz; t
R
< 10ns; t
F
< 10ns
OUTPUT
V
0D2
+
V
0D2
A – B
0V
0V
t
PLH
INPUT
t
SKEW =
|
t
PHL -
t
PLH
|
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