General Description
The MXL1544/MAX3175 are four-driver/four-receiver
multiprotocol transceivers that operate from a single
+5V supply in conjunction with the MXL1543. The
MXL1544/MAX3175, along with the MXL1543 and
MXL1344A, form a complete software-selectable data
terminal equipment (DTE) or data communication
equipment (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/
MAX3175 transceivers carry serial interface control sig-
naling, while the MXL1543 carries the high-speed clock
and data signals. Typically, the MXL1543 is terminated
using the MXL1344A. The MAX3175 is identical to the
MXL1544 except for the addition of a 10s (typ) glitch
rejection circuit at the receiver inputs. The MXL1544/
MAX3175 are available in 28-pin SSOP packages.
Applications
Data Networking
CSU and DSU
Data Routers
Switches
PCI Cards
Telecommunication Equipment
Features
o MXL1544/MAX3175, MXL1543, MXL1344A Chipset
Is Pin Compatible with LTC1544, LTC1543,
LTC1344A Chipset
o Chipset Operates from a Single +5V Supply
o Software-Selectable DCE/DTE
o Supports V.28 (RS-232), V.10/V.11 (RS-449/V.36,
EIA-530, EIA-530A, X.21, RS-423) Protocols
o Flow-Through Pin Configuration
o True Fail-Safe Operation
o Low 0.5A Shutdown Current (No-Cable Mode)
o 10s Receiver Input Deglitching (MAX3175 Only)
o TUV-Certified NET1/NET2 and TBR1/TBR2
Compliant
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-1992; Rev 0; 4/01
PART
TEMP. RANGE
PIN-PACKAGE
MXL1544CAI
0
C to +70C
28 SSOP
MAX3175CAI
0
C to +70C
28 SSOP
Typical Operating Circuit
D1
D2
D3
D4
R1
R2
R3
MXL1543
RXD
RXC
TXD
TXC
SCTE
D1
D2
D3
R1
R2
R3
MXL1544
MAX3175
CTS
DSR
RTS
DTR
DCD
RXC B
RXD A (104)
RXD B
SG (102)
SHIELD (101)
RTS A (105)
RTS B
DTR A (108)
DTR B
DCD A (107)
DCD B
DSR A (109)
CTS A (106)
DSR B
CTS B
LL A (141)
TXD B
SCTE A (113)
SCTE B
TXC A (114)
TXC B
TXD A (103)
DB-25 CONNECTOR
13
R4
LL
RXC A (115)
18
5
10 8
22 6
23 20 19 4
1
7
16 3
9 17
12 15 11 24 14 2
MXL1344A
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
DD
= +6.8V, V
EE
= -5.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
All Voltages to GND Unless Otherwise Noted
Supply Voltages
V
CC
.......................................................................-0.3V to +6V
V
DD
....................................................................-0.3V to +7.2V
V
EE
........................................................................+0.3V to -7V
V
DD
to V
EE
(Note 1)............................................................13V
Logic Input Voltage
M0, M1, M2, DCE/DTE, INVERT, T_IN..................-0.3V to +6V
Logic Output Voltage
R_OUT ....................................................-0.3V to (V
CC
+ 0.3V)
Transmitter Outputs
T_OUT_, T_OUT_/R_IN........................................-15V to +15V
Short-Circuit Duration.............................................Continuous
Receiver Inputs
R_IN_, T_OUT_/R_IN_ .........................................-15V to +15V
Continuous Power Dissipation (T
A
= +70C)
28-Pin SSOP (derate 11.1mW/C above +70C) .........889mW
Operating Temperature Range...............................0C to +70C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLIES
RS-530, RS-530A, X.21, no load
2.7
RS-530, RS-530A, X.21, full load
95
120
V.28, no load
1
2
V.28, full load
1
2
mA
V
C C
S up p l y C ur r ent ( D C E
M od e) ( D i g i tal Inp uts = G N D or
V
C C
) ( Tr ansm i tter s O utp uts
S tati c)
I
CC
No-cable mode, Invert = V
C C
0.5
10
A
RS-530, RS-530A, X.21, no load
2.1
RS-530, X.21, full load
14
RS-530A, full load
25
V.28, no load
1
V.28, full load
12
mA
V
EE
Supply Current (DCE
Mode) (Digital Inputs = GND
or V
CC
) (Transmitters Outputs
Static)
I
EE
No-cable mode
0.5
A
RS-530, RS-530A, X.21, no load
0.6
RS-530, RS-530A, X.21, full load
1
V.28, no load
1
V.28, full load
12
mA
V
D D
S up p l y C ur r ent ( D C E
M od e) ( D i g i tal Inp uts = G N D or
V
C C
) ( Tr ansm i tter s O utp uts
S tati c)
I
DD
No-cable mode
0.5
A
RS-530, RS-530A, X.21, full load
300
Internal Power Dissipation
(DCE Mode)
P
D
V.28, full load
54
mW
LOGIC INPUTS (M0, M1, M2, DCE/
DTE, INVERT, T1IN, T2IN, T3IN, T4IN)
Input High Voltage
V
IH
2.0
V
Input Low Voltage
V
IL
0.8
V
T1IN, T2IN, T3IN, T4IN
10
M0, M1, M2, DCE/
DTE, INVERT =
GND
-100
-50
-30
Logic Input Current
I
IN
M0, M1, M2, DCE/
DTE, INVERT =
V
CC
10
A
Note 1: V
DD
and V
EE
- can have maximum magnitude of 7.2V and 7V, respectively, but their difference cannot exceed 13V.
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT, R4OUT)
Output High Voltage
V
OH
I
SOURCE
= 4mA
3
4.5
V
Output Low Voltage
V
OL
I
SINK
= 4mA
0.3
0.8
V
Output Short-Circuit Current
I
SC
0
V
OUT
V
CC
-50
50
mA
Output Pullup Current
I
L
V
OUT
= 0, no-cable mode
70
A
RECEIVER INPUTS
Receiver Glitch Rejection
MAX3175 only
5
10
15
s
V.11 TRANSMITTER
Open-Circuit Differential Output
Voltage
V
ODO
Op en ci r cui t, R = 1.95k
( Fi g ur e 1)
5
V
R = 50
(Figure 1), T
A
= +25
C
0.5
V
ODO
0.67
V
ODO
Loaded Differential Output
Voltage
V
ODL
R = 50
(Figure 1)
2
V
Change in Magnitude of Output
Differential Voltage
V
OD
R = 50
(Figure 1)
0.2
V
Common-Mode Output Voltage
V
OC
R = 50
(Figure 1)
3
V
Change in Magnitude of Output
Common-Mode Voltage
V
OC
R = 50
(Figure 1)
0.2
V
Short-Circuit Current
I
SC
V
OUT
= GND
150
mA
Output Leakage Current
I
Z
-0.25V < V
OUT
< +0.25V, power-off or no-
cable mode
1
100
A
Rise or Fall Time
t
r
, t
f
R = 50
(Figures 2, 5)
2
15
25
ns
Transmitter Input to Output
t
PHL
,
t
PLH
R = 50
(Figures 2, 5)
50
75
ns
Data Skew
|t
PHL
-
t
PLH
|
(Figures 2, 5)
3
12
ns
Output-to-Output Skew
(Figures 2, 5)
3
ns
V.11 RECEIVER
Differential Input Voltage
V
TH
-7V
V
CM
7V
-200
200
mV
Input Hysteresis
V
TH
-7V
V
CM
7V
15
40
mV
Receiver Input Current
I
IN
-10V
V
A
,
B
10V
0.66
mA
Receiver Input Resistance
R
IN
-10V
V
A
,
B
10V
15
30
k
Rise or Fall Time
t
r
, t
f
(Figures 2, 6)
15
ns
MXL1544
50
80
ns
Receiver Input to Output
t
PHL
,
t
PLH
(Figures 2, 6)
MAX3175
10
s
MXL1544
4
16
ns
Data Skew
|t
PHL
-
t
PLH
|
(Figures 2, 6)
MAX3175
1
s
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
DD
= +6.8V, V
EE
= -5.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
DD
= +6.8V, V
EE
= -5.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V.10 TRANSMITTER
Open-Circuit Output Voltage
Swing
V
O
R
L
= 3.9k
(Figure 3)
4
6
V
R
L
= 450
(Figure 3)
3.6
Output Voltage Swing
V
T
R
L
= 450
(Figure 3), T
A
= +25
C
0.9 x
V
O
V
Short-Circuit Current
I
SC
V
O
= GND, T
A
= +25
C
150
mA
Output Leakage Current
I
Z
-0.25V < V
OUT
< +0.25V, power-off
or no-cable mode
1
100
A
Rise or Fall Time
t
r
, t
f
R
L
= 450
, C
L
= 100pF (Figures 3, 7)
2
s
Transmitter Input to Output
t
PHL
,
t
PLH
R
L
= 450
, C
L
= 100pF (Figures 3, 7)
1
s
V.10 RECEIVER
Differential Threshold Voltage
V
TH
-250
250
mV
Input Hysteresis
V
TH
25
50
mV
Receiver Input Current
I
IN
-10V
V
A
10V
0.66
mA
Receiver Input Impedance
R
IN
-10V
V
A
10V
15
30
k
Rise or Fall Time
t
r
, t
f
(Figures 4, 8)
15
ns
MXL1544
55
ns
t
PLH
MAX3175
10
s
MXL1544
109
ns
Receiver Input to Output
t
PHL
( Fi g ur es 4, 8)
MAX3175
10
s
MXL1544
60
ns
Data Skew
|t
PHL
-
t
PLH
|
( Fi g ur es 4, 8)
MAX3175
1
s
V.28 TRANSMITTER
Open circuit (Figure 3)
7
V
Output Voltage Swing
V
O
R
L
= 3k
(Figure 3)
5
6
V
Short-Circuit Current
I
SC
V
O
= GND
150
mA
Output Leakage Current
I
Z
-0.25V
V
OUT
+0.25V, power-off or
no-cable mode
1
100
A
Output Slew Rate
SR
R
L
= 3k
, C
L
= 2500pF (Figures 3, 7)
4
30
V/
s
t
PHL
1.5
2.5
Transmitter Input to Output
t
PLH
R
L
= 3k
, C
L
= 2500pF (Figures 3, 7)
1.5
3
s
V.28 RECEIVER
Input Low Voltage
V
IL
1.3
0.8
V
Input High Voltage
V
IH
2.0
1.3
V
Input Hysteresis
V
HYS
0.05
0.3
V
Input Resistance
R
IN
-15V < V
IN
< +15V
3
5
7
k
Rise or Fall Time
t
r
, t
f
(Figures 4, 8)
15
ns
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
_______________________________________________________________________________________
5
120
0.1
1
10
100
1000
10,000
100
80
60
40
20
V.11 MODE SUPPLY CURRENT (I
CC
)
vs. DATA RATE
MXL1544/MAX3175 toc01
DATA RATE (kbps)
I
CC
(mA)
0
FULL LOAD, R = 50
DCE MODE
INVERT = 1
NO LOAD, R = 1.95k
10
1
0.1
1
10
100
1000
10,000
V.11 MODE SUPPLY CURRENT (I
DD
)
vs. DATA RATE
2
3
MXL1544/MAX3175 toc02
DATA RATE (kbps)
I
DD
(mA)
5
4
8
9
7
6
FULL, R = 50
NO LOAD, R = 1.95k
DCE MODE
INVERT = 1
0
10
1
0.1
1
10
100
1000
10,000
V.11 MODE SUPPLY CURRENT (I
EE
)
vs. DATA RATE
2
3
MXL1544/MAX3175 toc03
DATA RATE (kbps)
I
EE
(mA)
5
4
8
9
7
6
FULL, R = 50
NO LOAD, R = 1.95k
DCE MODE
INVERT = 1
0
Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, V
DD
= +6.8V, V
EE
= -5.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MXL1544
60
100
ns
t
PLH
MAX3175
10
s
MXL1544
70
450
ns
Receiver Input to Output
t
PHL
(Figures 4, 8)
MAX3175
10
s
Note 2: MXL1544/MAX3175 are designed to operate with V
DD
and V
EE
supplied by the MXL1543 charge pump.
0.65
0.66
0.67
0.68
0.69
0.70
0.71
0.72
0.73
0
50
100
150
200
250
V.28 MODE SUPPLY CURRENT (I
CC
)
vs. DATA RATE
MXL1544/MAX3175 toc04
DATA RATE (kbps)
I
CC
(mA)
DCE MODE
INVERT = 0
FULL LOAD (R
L
= 3k
,
C
L
= 2500) AND NO LOAD
PDF 
ZIP