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MXL1544CAI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
______________________________________________________________________________________ 13
supply current is less than 10µA. The receiver outputs
enter a high-impedance state in no-cable mode, which
allows these output lines to be shared with other receiv-
er outputs (the receiver outputs have an internal pullup
resistor to pull the outputs HIGH if not driven). Also, in
no-cable mode, the transmitter outputs enter a high-
impedance state, so these output lines can be shared
with other devices.
Receiver Glitch Rejection
To improve operation in an unterminated or otherwise
noisy system, the MAX3175 features 10µs of receiver
input glitch rejection. The glitch-rejection circuitry
blocks the reception of high-frequency noise (t
B
< 5µs)
while receiving a low-frequency signal (t
B
>15µs) allow-
ing glitch-free operation in unterminated systems at up
to 60kbps. The MXL1544 does not have this feature
and can be operated at frequencies greater than
60kbps if properly terminated.
A′
C′
A
C
GENERATOR
UNBALANCED
INTERCONNECTING
CABLE
CABLE
TERMINATION
RECEIVER
LOAD
-3.25mA
3.25mA
-10V
+10V
-3V
+3V
V
Z
I
Z
R6
10kΩ
R8
5kΩ
A′
B′
C′
A
B
GND
R5
30kΩ
R7
10kΩ
R4
30kΩ
S4
S5
MXL1544
MAX3175
S3
RECEIVER
100Ω
MIN
A′
B′
C′
A
B
C
GENERATOR
BALANCED
INTERCONNECTING
CABLE
CABLE
TERMINATION
RECEIVER
LOAD
Figure 10. Typical V.10/V.28 Interface
Figure 11. Receiver Input Impedance Curve
Figure 12. V.10 Internal Resistance Network
Figure 13. Typical V.11 Interface
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
14 ______________________________________________________________________________________
DTE vs. DCE Operation
Figure 16 shows a port with one DB-25 connector that
can be configured for either DTE or DCE operation. The
configuration requires separate cables for proper sig-
nal routing in DTE or DCE operation. Figure 16 illus-
trates a DCE or DTE controller-selectable interface. The
DCE/DTE and INVERT inputs switch the port’s mode of
operation (Table 1).
The MXL1543 and MXL1544/MAX3175 can be connect-
ed for either DTE or DCE operation in one of two ways:
a dedicated DTE or DCE port with an appropriate gen-
der connector or a port with a connector that can be
configured for DTE or DCE operation by rerouting the
signals to the MXL1543 and MXL1544/MAX3175 using
a dedicated DTE cable or dedicated DCE cable. The
interface mode is selected by logic outputs from the
controller or from jumpers to either V
CC
or GND on the
mode select pins. A dedicated DCE port using a DB-25
female connector is shown in Figure 17. Figure 18 illus-
trates a dedicated DTE port using a DB-25 male con-
nector.
R6
10kΩ
R8
5kΩ
A′
B′
C′
A
B
GND
R5
30kΩ
R7
10kΩ
R4
30kΩ
MXL1544
MAX3175
S3
RECEIVER
R6
10kΩ
R8
5kΩ
A′
B′
C′
A
B
GND
R5
30kΩ
R7
10kΩ
R4
30kΩ
MXL1544
MAX3175
S3
RECEIVER
Figure 15. V.28 Termination and Internal Resistance NetworkFigure 14. V.11 Internal Resistance Networks
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
______________________________________________________________________________________ 15
PROTOCOL M2 M1 M0
DCE/
DTE
INVERT T1 T2 T3 R1 R2 R3 T4 R4
Not Used
(Default V.11)
0 0 0 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10
RS-530A 0 0 1 0 0 V.11 V.10 Z V.11 V.10 V.11 Z V.10
RS-530 0 1 0 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10
X.21 0 1 1 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10
V.35 1 0 0 0 0 V.28 V.28 Z V.28 V.28 V.28 Z V.28
RS-449/V.36 1 0 1 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10
V.28/RS-232 1 1 0 0 0 V.28 V.28 Z V.28 V.28 V.28 Z V.28
No Cable 1 1 1 0 0 Z Z Z Z Z Z Z Z
Not Used
(Default V.11)
0 0 0 0 1 V.11 V.11 Z V.11 V.11 V.11 V.10 Z
RS-530A 0 0 1 0 1 V.11 V.10 Z V.11 V.10 V.11 V.10 Z
RS-530 0 1 0 0 1 V.11 V.11 Z V.11 V.11 V.11 V.10 Z
X.21 0 1 1 0 1 V.11 V.11 Z V.11 V.11 V.11 V.10 Z
V.35 1 0 0 0 1 V.28 V.28 Z V.28 V.28 V.28 V.28 Z
RS-449/V.36 1 0 1 0 1 V.11 V.11 Z V.11 V.11 V.11 V.10 Z
V.28/RS-232 1 1 0 0 1 V.28 V.28 Z V.28 V.28 V.28 V.28 Z
No Cable 1 1 1 0 1 Z Z Z Z Z Z Z Z
Not Used
(Default V.11)
0 0 0 1 0 V.11 V.11 V.11 Z V.11 V.11 V.10 Z
RS-530A 0 0 1 1 0 V.11 V.10 V.11 Z V.10 V.11 V.10 Z
RS-530 0 1 0 1 0 V.11 V.11 V.11 Z V.11 V.11 V.10 Z
X.21 0 1 1 1 0 V.11 V.11 V.11 Z V.11 V.11 V.10 Z
V.35 1 0 0 1 0 V.28 V.28 V.28 Z V.28 V.28 V.28 Z
RS-449/V.36 1 0 1 1 0 V.11 V.11 V.11 Z V.11 V.11 V.10 Z
V.28/RS-232 1 1 0 1 0 V.28 V.28 V.28 Z V.28 V.28 V.28 Z
No Cable 1 1 1 1 0 Z Z Z Z Z Z Z Z
Not Used
(Default V.11)
0 0 0 1 1 V.11 V.11 V.11 Z V.11 V.11 Z V.10
RS-530A 0 0 1 1 1 V.11 V.10 V.11 Z V.10 V.11 Z V.10
RS-530 0 1 0 1 1 V.11 V.11 V.11 Z V.11 V.11 Z V.10
X.21 0 1 1 1 1 V.11 V.11 V.11 Z V.11 V.11 Z V.10
V.35 1 0 0 1 1 V.28 V.28 V.28 Z V.28 V.28 Z V.28
RS-449/V.36 1 0 1 1 1 V.11 V.11 V.11 Z V.11 V.11 Z V.10
V.28/RS-232 1 1 0 1 1 V.28 V.28 V.28 Z V.28 V.28 Z V.28
No Cable 1 1 1 1 1 Z Z Z Z Z Z Z Z
Table 1. Mode Select Table
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MXL1544CAI+T

Mfr. #:
Buy MXL1544CAI+T
Manufacturer:
Maxim Integrated
Description:
Interface - Specialized 5V Multiprotocol Cable Terminator
Lifecycle:
New from this manufacturer.
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