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參數(shù)資料
| 型號： | LTC1546C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Advanced LinEPIC Self-Calibrating Precision Dual Operational Amplifier 8-SOIC -40 to 125 |
| 中文描述： | 軟件選擇多協(xié)議收發(fā)器終止 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大小： | 265K |
| 代理商： | LTC1546C |
11
LTC1546
V.10 (RS423) Interface
All V.10 drivers and receivers necessary for the RS449,
EIA530, EIA530-A, V.36 and X.21 protocols are imple-
mented on the LTC1544.
A typical V.10 unbalanced interface is shown in Figure 19.
A V.10 single-ended generator with output A and ground
C is connected to a differential receiver with input A
'
con-
nected to A, and ground C
'
connected via the signal return
to ground C. Usually, no cable termination is required for
V.10 interfaces, but the receiver inputs must be compliant
with the impedance curve shown in Figure 20.
The V.10 receiver configuration in the LTC1544 is shown
in Figure 21. In V.10 mode, switch S3 inside the LTC1544
is turned off. The noninverting input is disconnected
inside the LTC1544 receiver and connected to ground. The
cable termination is then the 30k input impedance to
ground of the LTC1544 V.10 receiver.
V.11 (RS422) Interface
A typical V.11 balanced interface is shown in Figure 22. A
V.11 differential generator with outputs A and B and
ground C is connected to a differential receiver with input
A
'
connected to A, input B
'
connected to B, and ground C
'
connected via the signal return to ground C. The V.11
Figure 18: Single Port DCE V.35 Mode Selection in the Cable
NC
NC
CABLE
1546 F18
11
12
13
14
LTC1546
LTC1544
CONNECTOR
14
13
12
11
(DATA)
M0
M1
M2
DCE/DTE
DCE/DTE
M2
M1
M0
(DATA)
Figure 20. V.10 Receiver Input Impedance
Figure 19. Typical V.10 Interface
A
A
'
C
C
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
1546 F19
I
Z
V
Z
–10V
–3.25mA
3.25mA
–3V
3V
10V
1546 F20
APPLICATIOU
W
U
U
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