User Manual

MAX13171E/MAX13173E/MAX13175E
Multiprotocol, Pin-Selectable
Data Interface Chipset
28 ______________________________________________________________________________________
A
C
GENERATOR
UNBALANCED
INTERCONNECTING
CABLE
CABLE
TERMINATION
RECEIVER
LOAD
A′
C′
Figure 18. Typical V.10/V.28 Interface
-3.25mA
+3.25mA
-10V
+10V
-3V
+3V
V
Z
I
Z
Figure 19. Receiver Input Impedance Curve
R6
11kΩ
R8
5kΩ
A′
B′
C′
A
B
GND
R5
55kΩ
1.4V
R7
11kΩ
R4
55kΩ
MAX13171E
MAX13173E
S3
RECEIVER
S2
S1
+
-
Figure 20a. V.10 Internal Resistance Network for Receivers 1,
2, and 3
R6
11kΩ
R8
5kΩ
A′
C′
A
GND
R5
55kΩ
MAX13173E
S3
RECEIVER
Figure 20b. V.10 Internal Resistance Network for Receivers 4
and 5