參數(shù)資料
型號: LTC2846CG
廠商: Linear Technology
文件頁數(shù): 6/24頁
文件大?。?/td> 0K
描述: IC TXRX 3.3V MULTIPROTCOL 36SSOP
標(biāo)準(zhǔn)包裝: 37
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 3/3
規(guī)程: 多協(xié)議
電源電壓: 3.3V
安裝類型: 表面貼裝
封裝/外殼: 36-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 36-SSOP
包裝: 管件
14
LTC2846
sn2846 2846fs
Figure 22. Typical V.11 Interface
Figure 21. V.10 Receiver Configuration
Figure 24. Typical V.28 Interface
Figure 25. V.28 Receiver Configuration
Figure 23. V.11 Receiver Configuration
1Actually, there is no switch S1 in receivers R2 and R3. However, for simplicity, all termination
networks on the LTC2846 can be treated identically if it is assumed that an S1 switch exists and is
always closed on the R2 and R3 receivers.
APPLICATIO S I FOR ATIO
WU
UU
and LTC2845 receivers and connected to ground. The
cable termination is then the 30k input impedance to
ground of the LTC2844 and LTC2845 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
interface has a differential termination at the receiver end
that has a minimum value of 100
. The termination
resistor is optional in the V.11 specification, but for the
high speed clock and data lines, the termination is essen-
tial to prevent reflections from corrupting the data. The
receiver inputs must also be compliant with the imped-
ance curve shown in Figure 20.
In V.11 mode, all switches are off except S1 of the
LTC2846’s receivers which connects a 103
differential
termination impedance to the cable as shown in Figure
231. The LTC2844 and LTC2845 only handle control
signals, so no termination other than their V.11 receivers’
30k input impedance is necessary.
V.28 (RS232) Interface
A typical V.28 unbalanced interface is shown in Figure 24.
A V.28 single-ended generator with output A and ground
C is connected to a single-ended receiver with input A
'
connected to A and ground C
' connected via the signal
return to ground C.
R5
20k
LTC2844
RECEIVER
2846 F21
A
B
A
'
B
'
C
'
R8
6k
S3
R6
10k
R7
10k
GND
R4
20k
AA
'
B
C
B
'
C
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
100
MIN
2846 F22
R3
124
R5
20k
LTC2846
RECEIVER
2846 F23
A
'
B
'
C
'
R1
51.5
R8
6k
S2
S3
R2
51.5
R6
10k
R7
10k
GND
R4
20k
S1
AA
'
CC
'
GENERATOR
BALANCED
INTERCONNECTING
CABLE
LOAD
CABLE
TERMINATION
RECEIVER
2846 F24
R3
124
R5
20k
LTC2846
RECEIVER
2846 F25
A
'
B
'
C
'
R1
51.5
R8
6k
S2
S3
R2
51.5
R6
10k
R7
10k
GND
R4
20k
S1
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