LTC1344A 查看數據表（PDF） - Linear Technology
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LTC1344A Datasheet PDF : 12 Pages
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W
U
ODE SELECTIO
LTC1344A
LTC1344A
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
RS530
0
0
1
0
Z
Z
Z
V.11
V.11
V.11
1
0
1
0
Z
Z
Z
Z
V.11
V.11
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
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
C
C
C
A
R1
51.5Ω
S1
S2
ON
OFF
LTC1344A
A
R3
124Ω
R1
51.5Ω
S1
ON
S2
ON
LTC1344A
R3
124Ω
A
R1
51.5Ω
S1
S2
OFF
OFF
LTC1344A
R3
124Ω
R2
51.5Ω
B
R2
51.5Ω
B
R2
51.5Ω
B
V.11 Mode
V.35 Mode
Figure 3. LTC1344A Modes
High-Z Mode
1344 F03
5
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