19-1992; Rev 0; 4/01
+5V Multiprotocol, Software-Selectable
Control Transceivers
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 10µs (typ) glitch
rejection circuit at the receiver inputs. The MXL1544/
MAX3175 are available in 28-pin SSOP packages.
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 0.5µA Shutdown Current (No-Cable Mode)
o
10µs Receiver Input Deglitching (MAX3175 Only)
o
TUV-Certified NET1/NET2 and TBR1/TBR2
Compliant
MXL1544/MAX3175
Applications
Data Networking
CSU and DSU
Data Routers
Switches
PCI Cards
Telecommunication Equipment
Ordering Information
PART
MXL1544CAI
MAX3175CAI
TEMP. RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 SSOP
28 SSOP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
LL
CTS
DSR
DCD
DTR
RTS
RXD
RXC
TXC
SCTE TXD
D4
R4
R3
R2
R1
MXL1544
MAX3175
D3
D2
D1
R3
R2
R1
MXL1543
D3
D2
D1
MXL1344A
18
LL A (141)
13 5 10 8
CTS A (106)
CTS B
DSR A (109)
DSR B
22 6
DCD A (107)
DCD B
23 20 19 4
DTR A (108)
DTR B
RTS A (105)
RTS B
1
7
16 3
RXD A (104)
RXD B
9 17
RXC A (115)
RXC B
12 15 11 24 14 2
TXC A (114)
TXC B
SCTE A (113)
SCTE B
TXD A (103)
TXD B
DB-25 CONNECTOR
________________________________________________________________
Maxim Integrated Products
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.
SG (102)
SHIELD (101)
1
+5V Multiprotocol, Software-Selectable
Control Transceivers
MXL1544/MAX3175
ABSOLUTE MAXIMUM RATINGS
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
= +70°C)
28-Pin SSOP (derate 11.1mW/°C above +70°C) .........889mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
V
DD
and V
EE
- can have maximum magnitude of 7.2V and 7V, respectively, but their difference cannot exceed 13V.
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.
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
= +25°C.) (Note 2)
PARAMETER
POWER SUPPLIES
RS-530, RS-530A, X.21, no load
V
CC
Supply Current (DCE
Mode) (Digital Inputs = GND or
V
CC
) (Transmitters Outputs
Static)
RS-530, RS-530A, X.21, full load
I
CC
V.28, no load
V.28, full load
No-cable mode, Invert = V
CC
RS-530, RS-530A, X.21, no load
V
EE
Supply Current (DCE
Mode) (Digital Inputs = GND
or V
CC
) (Transmitters Outputs
Static)
RS-530, X.21, full load
I
EE
RS-530A, full load
V.28, no load
V.28, full load
No-cable mode
RS-530, RS-530A, X.21, no load
V
DD
Supply Current (DCE
Mode) (Digital Inputs = GND or
V
CC
) (Transmitters Outputs
Static)
Internal Power Dissipation
(DCE Mode)
RS-530, RS-530A, X.21, full load
I
DD
V.28, no load
V.28, full load
No-cable mode
P
D
RS-530, RS-530A, X.21, full load
V.28, full load
2.0
0.8
±10
-100
-50
-30
±10
2.7
95
1
1
0.5
2.1
14
25
1
12
0.5
0.6
1
1
12
0.5
300
54
µA
mW
mA
µA
mA
120
2
2
10
µA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC INPUTS (M0, M1, M2, DCE/DTE, INVERT, T1IN, T2IN, T3IN, T4IN)
Input High Voltage
V
IH
Input Low Voltage
V
IL
T1IN, T2IN, T3IN, T4IN
M0, M1, M2, DCE/DTE, INVERT =
Logic Input Current
I
IN
GND
M0, M1, M2, DCE/DTE, INVERT =
V
CC
V
V
µA
2
_______________________________________________________________________________________
+5V Multiprotocol, Software-Selectable
Control Transceivers
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
= +25°C.) (Note 2)
PARAMETER
Output High Voltage
Output Low Voltage
Output Short-Circuit Current
Output Pullup Current
RECEIVER INPUTS
Receiver Glitch Rejection
V.11 TRANSMITTER
Open-Circuit Differential Output
Voltage
Loaded Differential Output
Voltage
Change in Magnitude of Output
Differential Voltage
Common-Mode Output Voltage
Change in Magnitude of Output
Common-Mode Voltage
Short-Circuit Current
Output Leakage Current
Rise or Fall Time
Transmitter Input to Output
Data Skew
Output-to-Output Skew
V.11 RECEIVER
Differential Input Voltage
Input Hysteresis
Receiver Input Current
Receiver Input Resistance
Rise or Fall Time
Receiver Input to Output
Data Skew
V
TH
∆V
TH
I
IN
R
IN
t
r
, t
f
t
PHL
,
t
PLH
|t
PHL
-
t
PLH
|
-7V
≤
V
CM
≤
7V
-7V
≤
V
CM
≤
7V
-10V
≤V
A
,
B
≤
10V
-10V
≤
V
A
,
B
≤
10V
(Figures 2, 6)
(Figures 2, 6)
(Figures 2, 6)
MXL1544
MAX3175
MXL1544
MAX3175
15
30
15
50
10
4
1
16
80
-200
15
200
40
±0.66
mV
mV
mA
kΩ
ns
ns
µs
ns
µs
V
ODO
Open circuit, R = 1.95kΩ (Figure 1)
R = 50Ω (Figure 1), T
A
= +25°C
R = 50Ω (Figure 1)
∆V
OD
V
OC
∆V
OC
I
SC
I
Z
t
r
, t
f
t
PHL
,
t
PLH
|t
PHL
-
t
PLH
|
R = 50Ω (Figure 1)
R = 50Ω (Figure 1)
R = 50Ω (Figure 1)
V
OUT
= GND
-0.25V < V
OUT
< +0.25V, power-off or no-
cable mode
R = 50Ω (Figures 2, 5)
R = 50Ω (Figures 2, 5)
(Figures 2, 5)
(Figures 2, 5)
2
±1
15
50
3
3
0.5
✕
V
ODO
±2
0.2
3
0.2
150
±100
25
75
12
V
V
V
mA
µA
ns
ns
ns
ns
±5
0.67
✕
V
ODO
V
MAX3175 only
5
10
15
µs
SYMBOL
V
OH
V
OL
I
SC
I
L
CONDITIONS
I
SOURCE
= 4mA
I
SINK
= 4mA
0
≤
V
OUT
≤
V
CC
V
OUT
= 0, no-cable mode
-50
70
MIN
3
TYP
4.5
0.3
0.8
50
MAX
UNITS
V
V
mA
µA
MXL1544/MAX3175
LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT, R4OUT)
V
ODL
V
_______________________________________________________________________________________
3
+5V Multiprotocol, Software-Selectable
Control Transceivers
MXL1544/MAX3175
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
= +25°C.) (Note 2)
PARAMETER
V.10 TRANSMITTER
Open-Circuit Output Voltage
Swing
Output Voltage Swing
Short-Circuit Current
Output Leakage Current
Rise or Fall Time
Transmitter Input to Output
V.10 RECEIVER
Differential Threshold Voltage
Input Hysteresis
Receiver Input Current
Receiver Input Impedance
Rise or Fall Time
V
TH
∆V
TH
I
IN
R
IN
t
r
, t
f
t
PLH
Receiver Input to Output
t
PHL
Data Skew
V.28 TRANSMITTER
Output Voltage Swing
Short-Circuit Current
Output Leakage Current
Output Slew Rate
Transmitter Input to Output
V.28 RECEIVER
Input Low Voltage
Input High Voltage
Input Hysteresis
Input Resistance
Rise or Fall Time
V
IL
V
IH
V
HYS
R
IN
t
r
, t
f
-15V < V
IN
< +15V
(Figures 4, 8)
3
2.0
1.3
1.3
0.05
5
15
0.3
7
0.8
V
V
V
kΩ
ns
V
O
I
SC
I
Z
SR
t
PHL
t
PLH
Open circuit (Figure 3)
R
L
= 3kΩ (Figure 3)
V
O
= GND
-0.25V
≤
V
OUT
≤
+0.25V, power-off or
no-cable mode
R
L
= 3kΩ, C
L
= 2500pF (Figures 3, 7)
R
L
= 3kΩ, C
L
= 2500pF (Figures 3, 7)
4
1.5
1.5
±1
±5
±6
±150
±100
30
2.5
3
±7
V
V
mA
µA
V/µs
µs
|t
PHL
-
t
PLH
|
(Figures 4, 8)
(Figures 4, 8)
-10V
≤
V
A
≤
10V
-10V
≤
V
A
≤
10V
(Figures 4, 8)
MXL1544
MAX3175
MXL1544
MAX3175
MXL1544
MAX3175
15
30
15
55
10
109
10
60
1
-250
25
250
50
±0.66
mV
mV
mA
kΩ
ns
ns
µs
ns
µs
ns
µs
V
O
R
L
= 3.9kΩ (Figure 3)
R
L
= 450Ω (Figure 3)
V
T
I
SC
I
Z
t
r
, t
f
t
PHL
,
t
PLH
R
L
= 450Ω (Figure 3), T
A
= +25°C
V
O
= GND, T
A
= +25°C
-0.25V < V
OUT
< +0.25V, power-off
or no-cable mode
R
L
= 450Ω, C
L
= 100pF (Figures 3, 7)
R
L
= 450Ω, C
L
= 100pF (Figures 3, 7)
±1
2
1
±4
±3.6
0.9 x
V
O
±150
±100
V
mA
µA
µs
µs
±6
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4
_______________________________________________________________________________________
+5V Multiprotocol, Software-Selectable
Control Transceivers
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
= +25°C.) (Note 2)
PARAMETER
SYMBOL
t
PLH
Receiver Input to Output
t
PHL
(Figures 4, 8)
CONDITIONS
MXL1544
MAX3175
MXL1544
MAX3175
MIN
TYP
60
10
70
10
450
MAX
100
UNITS
ns
µs
ns
µs
MXL1544/MAX3175
Note 2:
MXL1544/MAX3175 are designed to operate with V
DD
and V
EE
supplied by the MXL1543 charge pump.
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
V.11 MODE SUPPLY CURRENT (I
CC
)
vs. DATA RATE
MXL1544/MAX3175 toc01
V.11 MODE SUPPLY CURRENT (I
DD
)
vs. DATA RATE
9
8
7
I
DD
(mA)
6
5
4
FULL LOAD, R = 50Ω
100
80
I
CC
(mA)
60
40
20
NO LOAD, R = 1.95kΩ
0
0.1
1
10
100
1000
DCE MODE
INVERT = 1
DCE MODE
INVERT = 1
3
2
1
0
10,000
0.1
1
10
100
1000
10,000
DATA RATE (kbps)
DATA RATE (kbps)
FULL, R = 50Ω
NO LOAD, R = 1.95kΩ
V.11 MODE SUPPLY CURRENT (I
EE
)
vs. DATA RATE
MXL1544/MAX3175 toc03
V.28 MODE SUPPLY CURRENT (I
CC
)
vs. DATA RATE
0.72
0.71
I
CC
(mA)
0.70
0.69
0.68
FULL LOAD (R
L
= 3kΩ,
C
L
= 2500) AND NO LOAD
DCE MODE
INVERT = 0
MXL1544/MAX3175 toc04
10
9
8
7
I
EE
(mA)
6
5
4
3
2
1
0
0.1
1
10
100
1000
DCE MODE
INVERT = 1
0.73
FULL, R = 50Ω
NO LOAD, R = 1.95kΩ
0.67
0.66
0.65
10,000
0
50
100
150
200
250
DATA RATE (kbps)
DATA RATE (kbps)
_______________________________________________________________________________________
MXL1544/MAX3175 toc02
120
10
5
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