參數(shù)資料
型號(hào): LTC1545C
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(yè)數(shù): 10/16頁(yè)
文件大小: 244K
代理商: LTC1545C
10
LTC1545
APPLICATIO
S I
N
FOR
ATIO
U
W
U
Figure 12. V.10 Receiver Input Impedance
Figure 13. V.10 Receiver Configuration
Figure 14. Typical V.11 Interface
R3
124
R5
20k
LTC1344A
LTC1543
LTC1545
RECEIVER
1545 F15
A
B
A
'
B
'
C
'
R1
51.5
R8
6k
S2
S3
R2
51.5
R6
10k
R7
10k
GND
R4
20k
S1
I
Z
V
Z
–10V
–3.25mA
3.25mA
–3V
3V
10V
1545 F12
R5
20k
LTC1545
RECEIVER
1545 F13
A
B
A
'
B
'
C
'
R8
6k
S3
R6
10k
R7
10k
GND
R4
20k
A
A
'
B
C
B
'
C
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
100
MIN
1545 F14
A
A
'
C
C
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
1545 F11
Figure 11. Typical V.10 Interface
Figure 15. V.11 Receiver Configuration
In V.11 mode, all switches are off except S1 inside the
LTC1344A which connects a 103
differential termina-
tion impedance to the cable as shown in Figure 15.
V.28 (RS232) Interface
A typical V.28 unbalanced interface is shown in Figure 16.
A V.28 single-ended generator output A with ground C is
connected to a single-ended receiver with input A
'
con-
nected to A, ground C
'
connected via the signal return
ground C.
In V.28 mode, all switches are off except S3 inside the
LTC1543/LTC1545 which connects a 6k (R8) impedance
to ground in parallel with 20k (R5) plus 10k (R6) for a
combined impedance of 5k as shown in Figure 17. The
noninverting input is disconnected inside the LTC1543/
LTC1545 receiver and connected to a TTL level reference
voltage for a 1.4V receiver trip point.
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