Datasheet

5
LTC1344A
LTC1344A
MODE NAME DCE/DTE M2 M1 M0 R1 R2 R3 R4 R5 R6
V.10/RS423 X 000ZZZZZZ
RS530A 0 001ZZZV.11 V.11 V.11
1 001ZZZZV.11 V.11
RS530 0 010ZZZV.11 V.11 V.11
1 010ZZZZV.11 V.11
X.21 0 011ZZZV.11 V.11 V.11
1 011ZZZZV.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 101ZZZV.11 V.11 V.11
1 101ZZZZV.11 V.11
V.28/RS232 X 110ZZZZZZ
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
ODE SELECTIO
W U
R1
51.5Ω
R2
51.5Ω
R3
124Ω
S2
OFF
S1
ON
V.11 Mode V.35 Mode High-Z Mode
A
B
R1
51.5Ω
R2
51.5Ω
R3
124Ω
S2
ON
S1
ON
A
B
R1
51.5Ω
R2
51.5Ω
1344 F03
R3
124Ω
A
B
S2
OFF
S1
OFF
C C C
LTC1344A LTC1344A LTC1344A
Figure 3. LTC1344A Modes