參數(shù)資料
型號: LTC1544
廠商: Linear Technology Corporation
英文描述: Software-Selectable Multiprotocol Transceiver
中文描述: 軟件選擇多協(xié)議收發(fā)器
文件頁數(shù): 12/20頁
文件大?。?/td> 277K
代理商: LTC1544
12
LTC1544
A
A
'
B
C
B
'
C
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
1544 F18
50
125
50
50
125
50
Figure 18. Typical V.35 Interface
R3
124
R5
20k
LTC1344A
LTC1543
RECEIVER
1544 F19
A
B
A
'
B
'
C
'
R1
51.5
R8
6k
S2
S3
R2
51.5
R6
10k
R7
10k
GND
R4
20k
S1
Figure 19. V.35 Receiver Configuration
V.35 Interface
A typical V.35 balanced interface is shown in Figure 18. A
V.35 differential generator with outputs A and B with
ground C is connected to a differential receiver with
ground C
'
, inputs A
'
connected to A, B
'
connected to B. The
V.35 interface requires a T or delta network termination at
the receiver end and the generator end. The receiver
differential impedance measured at the connector must be
100
±
10
, and the impedance between shorted termi-
nals (A
'
and B
'
)
and ground C
'
must be 150
±
15
.
In V.35 mode, both switches S1 and S2 inside the LTC1344A
are on, connecting the T network impedance as shown in
Figure 19. The switch in the LTC1543 is off. The 30k input
impedance of the receiver is placed in parallel with the T
network termination, but does not affect the overall input
impedance significantly.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
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