7
LTC1343
TEST CIRCUITS
Figure 1. RS422 Driver Test Circuit Figure 2. RS422 Driver/Receiver AC Test Circuit
Figure 4. V.10/V.28 Driver Test Circuit Figure 5. V.10/V.28 Receiver Test Circuit
Figure 3. V.35 Driver/Receiver Test Circuit
ODE SELECTIO
W
U
LTC1343 MODE NAME M2 M1 M0 CTRL/CLK D1 D2 D3 D4 R1 R2 R3 R4
V.10, RS423 0 0 0 X V.10 V.10 V.10 V.10 V.10 V.10 V.10 V.10
EIA-530-A Clock and Data 0 0 1 0 V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.10
EIA-530-A Control 0 0 1 1 V.10 V.11 V.10 V.11 V.11 V.10 V.11 V.10
Reserved 0 1 0 X V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.10
X.21 0 1 1 X V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.10
V.35 Clock and Data 1 0 0 0 V.28 V.35 V.35 V.35 V.35 V.35 V.35 V.28
V.35 Control 1 0 0 1 V.28 V.28 V.28 V.28 V.28 V.28 V.28 V.28
EIA-530, RS449, V.36 1 0 1 X V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.10
V.28, RS232 1 1 0 X V.28 V.28 V.28 V.28 V.28 V.28 V.28 V.28
No Cable 1 1 1 X Z Z Z Z Z Z Z Z
A
B
1343 F01
V
OD
V
OC
R
L
50Ω
R
L
50Ω
A
B
A
R
B
1343 F02
R
L
100Ω
C
L
100pF
C
L
100pF
15pF
A
B
D
A
B
1343 F03
R
V
OD
V
CM
50Ω
125Ω
125Ω
50Ω
50Ω
50Ω
15pF
A
D
1343 F04
R
L
C
L
A
D
1343 F04
15pF
R
A
