參數(shù)資料
型號： SP3494EP
英文描述： +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
中文描述： 3.3V低功耗轉(zhuǎn)換率受限的RS-485/RS-422收發(fā)器
文件頁數(shù)： 7/11頁
文件大?。?/td> 131K
代理商： SP3494EP
7
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
Copyright 2002 Sipex Corporation
INPUTS
OUTPUTS
LINE
RE
X
X
X
DE
1
1
0
DI CONDITION
1
No Fault
0
No Fault
X
B
0
1
Z
A
1
0
Z
X
INPUTS
RE
0
0
0
1
Table 2. Receive Function Truth Table
OUTPUTS
R
1
0
1
Z
DE
0
0
0
0
A - B
+0.2V
-0.2V
Inputs Open
X
Table 1. Transmit Function Truth Table
Figure 1. Driver DC Test Load Circuit
Figure 7. Receiver Enable and Disable Timing Circuit
R
R
V
OC
D
V
CC
V
OD
GENERATOR
50
V
CC
S1
V
DM
R
L
= 27
OUT
L
= 15pF
C
V
OM
= V
OH
+ V
OL
D
GENERATOR
50
S1
R
L
= 110
OUT
L
= 50pF
C
V
OM
= V
OH
+ V
OL
D
GENERATOR
50
S1
R
L
= 110
OUT
L
= 50pF
C
D
0V OR 3V
V
CC
GENERATOR
50
1.5V
0V
V
ID
R
OUT
L
= 15pF
C
OM
= V
CC
V
1.5V
-1.5V
S3
V
ID
50
L
= 15pF
C
R
1k
S1
S2
V
CC
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
GENERATOR
50
C
L
OUT
D
V
CC
R
L
=
60
C
L
= 15pF (NOTE 2)
Figure 3. Driver Differential Output Delay and
Transition Time Circuit
Figure 2. Driver Propagation Delay Test Circuit
Figure 6. Receiver Propagation Delay Test Circuit
Figure 4. Driver Enable and Disable Timing Circuit,
output HiGH
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