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MAX3175CAI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
_______________________________________________________________________________________ 7
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
0 1000 1500500 2000 2500 3000
V.10 TRANSMITTER RISE AND FALL TIME
vs. LOAD CAPACITANCE
MXL1544/MAX3175 toc13
CAPACITANCE (pF)
RISE/FALL TIME (µs)
RISE
FALL
4µs/div
MXL1544 LOOPBACK SCOPE PHOTO
V.11 MODE (UNLOADED)
T
IN
T
OUT
/
R
IN
5V/div
5V/div
5V/div
MXL1544/MAX3175 toc14
R
OUT
4µs/div
MXL1544 LOOPBACK SCOPE PHOTO
V.28 MODE (LOADED)
T
IN
T
OUT
/
R
IN
5V/div
5V/div
5V/div
MXL1544/MAX3175 toc15
R
OUT
4µs/div
MXL1544 LOOPBACK SCOPE PHOTO
V.10 MODE (LOADED)
T
IN
T
OUT
/
R
IN
5V/div
5V/div
5V/div
MXL1544/MAX3175 toc16
R
OUT
-5
-2
-3
-4
-1
0
1
2
3
4
5
-15 -5-10 0 5 10 15
V.28 RECEIVER INPUT CURRENT
vs. INPUT VOLTAGE
MXL1544/MAX3175 toc11
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
0
4
2
10
8
6
16
14
12
18
020001000 3000 4000 5000
V.28 SLEW RATE vs. LOAD CAPACITANCE
MXL1544/MAX3175 toc12
CAPACITANCE (pF)
SLEW RATE (V/µs)
SLEW-
SLEW+
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
8 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1V
CC
+5V Supply Voltage (±5%). Bypass with a 1µF capacitor to ground.
2V
DD
Positive Supply Generated by MXL1543. Bypass with a 1µF capacitor to ground.
3 T1IN Transmitter 1 TTL-Compatible Input
4 T2IN Transmitter 2 TTL-Compatible Input
5 T3IN Transmitter 3 TTL-Compatible Input
6 R1OUT Receiver 1 CMOS Output
7 R2OUT Receiver 2 CMOS Output
8 R3OUT Receiver 3 CMOS Output
9 T4IN Transmitter 4 TTL-Compatible Input
10 R4OUT Receiver 4 CMOS Output
11 M0 TTL-Compatible Mode Select Pin with Internal Pullup to V
CC
12 M1 TTL-Compatible Mode Select Pin with Internal Pullup to V
CC
13 M2 TTL-Compatible Mode Select Pin with Internal Pullup to V
CC
14 DCE/DTE TTL-Compatible Input with Internal Pullup to V
CC
. Logic level high selects DCE interface.
15 INVERT TTL Inp ut w i th Inter nal P ul l up to V
C C
. IN V E RT = H IGH r ever ses acti on of D C E /DTE for C hannel 4.
16 T4OUTA/R4INA Transmitter Output/Inverting Receiver Input
17 R3INB Noninverting Receiver Input
18 R3INA Inverting Receiver Input
19 R2INB Noninverting Receiver Input
20 R2INA Inverting Receiver Input
21 T3OUTB/R1INB Noninverting Transmitter Output/Noninverting Receiver Input
22 T3OUTA/R1INA Inverting Transmitter Output/Inverting Receiver Input
23 T2OUTB Noninverting Transmitter Output
24 T2OUTA Inverting Transmitter Output
25 T1OUTB Noninverting Transmitter Output
26 T1OUTA Inverting Transmitter Output
27 GND Ground
28 V
EE
Negative Supply Generated by MXL1543. Bypass with a 1µF capacitor to ground.
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
_______________________________________________________________________________________ 9
Detailed Description
The MXL1544/MAX3175 are four-driver/four-receiver
multiprotocol transceivers that operate from a single
+5V supply and the charge pump from the MXL1543.
The MXL1544/MAX3175, along with the MXL1543 and
MXL1344A, form a complete software-selectable DTE
or DCE interface port that supports the V.28 (RS-232),
V.10/V.11 (RS-449, V.36, EIA-530, EIA-530A, X.21, RS-
423), and V.35 protocols. The MXL1544 or MAX3175
usually carries the control signals. The MXL1543 car-
ries the high-speed clock and data signals, and the
MXL1344A provides termination for the clock and data
signals.
The MXL1544/MAX3175 feature a 0.5µA no-cable
mode, true fail-safe operation, and thermal shutdown
circuitry. Thermal shutdown protects the drivers against
excessive power dissipation. When activated, the ther-
mal shutdown circuitry places the driver outputs into a
high-impedance state. The MAX3175 deglitching fea-
ture reduces errors in unterminated equipment.
The state of the mode-select pins M0, M1, and M2
determines which serial-interface protocol is selected
(Table 1). The state of the DCE/DTE input determines
whether the transceivers will be configured as a DTE
serial port or a DCE serial port. When the DCE/DTE
input is logic HIGH, driver T3 is activated and receiver
R1 is disabled. When the DCE/DTE input is logic LOW,
driver T3 is disabled and receiver R1 is activated. The
INVERT pin state changes the DCE/DTE functionality
regarding T4 and R4 only. M0, M1, M2, INVERT, and
DCE/DTE are internally pulled up to V
CC
to ensure logic
HIGH if left unconnected.
V
OC
R
R
V
OD
Figure 1. V.11 DC Test Circuit
C
L
R
L
V
O
DA
Figure 3. V.10/V.28 Driver Test Circuit
100pF
15pF
100pF
100Ω
D
A
B
B
A
R
15pF
DAR
Figure 2. V.11 AC Test Circuit
Figure 4. V.10/V.28 Receiver Test Circuit
Test Circuits
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX3175CAI+T

Mfr. #:
Buy MAX3175CAI+T
Manufacturer:
Maxim Integrated
Description:
Interface - Specialized 5V Multiprotocol
Lifecycle:
New from this manufacturer.
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