
6
LTC1543
sn1534 1543fas
TEST CIRCUITS
A
B
D
A
B
1543 F03
R
VOD
VCM
50
125
125
50
50
50
15pF
Figure 3. V.35 Driver/Receiver Test Circuit
A
D
1543 F04
RL
CL
Figure 4. V.10/V.28 Driver Test Circuit
Figure 5. V.10/V.28 Receiver Test Circuit
A
D
1543 F04
15pF
R
A
ODE SELECTIO
W
U
LTC1543 MODE NAME
M2
M1
M0
DCE/DTE
D1
D2
D3
R1
R2
R3
Not Used (Default V.11)
0000
V.11
Z
V.11
RS530A
0010
V.11
Z
V.11
RS530
0100
V.11
Z
V.11
X.21
0110
V.11
Z
V.11
V.35
1000
V.35
Z
V.35
RS449/V.36
1010
V.11
Z
V.11
V.28/RS232
1100
V.28
Z
V.28
No Cable
1110ZZZZZZ
Not Used (Default V.11)
0001
V.11
Z
V.11
RS530A
0011
V.11
Z
V.11
RS530
0101
V.11
Z
V.11
X.21
0111
V.11
Z
V.11
V.35
1001
V.35
Z
V.35
RS449/V.36
1011
V.11
Z
V.11
V.28/RS232
1101
V.28
Z
V.28
No Cable
1111ZZZZZZ