LTC1344 Просмотр технического описания (PDF) - Linear Technology
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LTC1344 Datasheet PDF : 12 Pages
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W
U
ODE SELECTIO
LTC1344
LTC1344
MODE NAME
DCE/DTE
M2
M1
M0
R1
R2
R3
R4
R5
R6
V.10/RS423
X
0
0
0
Z
Z
Z
Z
Z
Z
RS530A
0
0
0
1
Z
Z
Z
V.11
V.11
V.11
1
0
0
1
Z
Z
Z
Z
V.11
V.11
Reserved
0
0
1
0
Z
Z
Z
V.11
V.11
V.11
1
0
1
0
V.11
V.11
V.11
Z
Z
Z
X.21
0
0
1
1
Z
Z
Z
V.11
V.11
V.11
1
0
1
1
Z
Z
Z
Z
V.11
V.11
V.35
0
1
0
0
V.35
V.35
Z
V.35
V.35
V.35
1
1
0
0
V.35
V.35
V.35
Z
V.35
V.35
RS530/RS449/V.36
0
1
0
1
Z
Z
Z
V.11
V.11
V.11
1
1
0
1
Z
Z
Z
Z
V.11
V.11
V.28/RS232
X
1
1
0
Z
Z
Z
Z
Z
Z
No Cable
X
1
1
1
V.11
V.11
V.11
V.11
V.11
V.11
X = don’t care, 0 = logic low, 1 = logic high
A
R1
51.5Ω
C
S1
S2
ON
OFF
R3
124Ω
R2
51.5Ω
B
V.11 Mode
A
R1
51.5Ω
C
S1
ON
S2
ON
R3
124Ω
R2
51.5Ω
B
V.35 Mode
Figure 3. LTC1344 Modes
A
R1
51.5Ω
C
S1
S2
OFF
OFF
R3
124Ω
R2
51.5Ω
B
1344 F03
Hi-Z Mode
5
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