19-4742; Rev 0; 7/09
KIT
ATION
EVALU
E
BL
AVAILA
+5V Multiprotocol, Pin-Selectable
Cable Terminator
General Description
Features
♦
Supports V.11 and V.35 Termination
♦
Pin-Selectable Termination
♦
Pin-Selectable DCE/DTE Support
♦
Replaces Discrete Resistor Termination Networks
and Expensive Relays
♦
Available in 24-Pin SSOP Package
♦
Certified TBR-1 and TBR-2-Compliant Chipset
(NET1 and NET2)—Pending Completion of Testing
MAX13174E
The MAX13174E contains six pin-selectable, multiproto-
col cable termination networks. Each network is capa-
ble of terminating V.11 (RS-422, RS-530, RS-530A,
RS-449, V.36, and X.21) with a 100Ω differential load,
V.35 with a T-network load, or V.28 (RS-232) and V.10
(RS-423) with an open-circuit load for use with trans-
ceivers having on-chip termination. The termination pro-
tocol can be selected by the serial interface cable
wiring or by pin control. The MAX13174E replaces dis-
crete resistor termination networks and expensive
relays required for multiprotocol termination, saving
space and cost.
The MAX13174E terminator is ideal to form a complete
+5V cable- or pin-selectable multiprotocol DCE/DTE
interface port when used with the MAX13170E and
MAX13172E transceiver ICs. The MAX13174E termina-
tor can use the V
EE
power generated by the
MAX13170E charge pump, simplifying system design.
The MAX13174E/MAX13170E/MAX13172E are pin-
for-pin compatible with the MXL1344A/MXL1543/
MXL1544/MAX3175.
The MAX13174E is available in a 24-pin SSOP package
and is specified for the 0°C to +70°C commercial tem-
perature range.
Applications
Data Networking
CSU and DSU
Data Routers
PCI Cards
Telecommunication Equipment
Data Switches
Ordering Information
PART
MAX13174ECAG+
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
24 SSOP
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
LL
CTS
DSR
DCD
DTR
RTS
RXD
RXC
TXC
SCTE TXD
T4
R4
R3
R2
R1
MAX13172E
T3
T2
T1
R3
R2
R1
MAX13170E
T3
T2
T1
MAX13174E
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
SHIELD (101)
7
SG (102)
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
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
+5V Multiprotocol, Pin-Selectable
Cable Terminator
MAX13174E
ABSOLUTE MAXIMUM RATINGS
(All voltages to GND, unless otherwise noted.)
Supply Voltages
V
CC
.......................................................................-0.3V to +6V
V
EE
.....................................................................+0.3V to -7.1V
Logic-Input Voltages
M0, M1, M2, DCE/DTE,
LATCH............................-0.3V
to +6V
Termination Network Inputs
R_A, R_B, R_C.....................................................-15V to +15V
R_A to R_B (high-impedance state) ................................±14V
R_A to R_B.........................................................................±6V
R_C to R_B (high-impedance state) ..................................±3V
R_A to R_C.........................................................................±3V
R_C to R_A (high-impedance state) ................................±14V
Continuous Power Dissipation (T
A
= +70°C)
24-Pin SSOP (derate 14.9mW/°C above +70°C) .......1196mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
24-Pin SSOP..............................................................24.6°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
24-Pin SSOP..............................................................66.9°C/W
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:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
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
= +4.5V to +5.5V, V
EE
= -4V to -7.1V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C, V
CC
= +5V,
V
EE
= -5V, unless otherwise noted.) (Note 2)
PARAMETER
V
CC
Operating Range
V
EE
Operating Range
V
CC
POR Rising Threshold
V
CC
Supply Current
I
CC
All inputs connected to GND or V
CC
, except
no-cable mode
All inputs connected to GND or V
CC
, except
no-cable mode
SYMBOL
V
CC
V
EE
CONDITIONS
MIN
4.5
-7.1
1
TYP
5
-5
1.88
2.2
1.34
-3.5
-1
MAX
5.5
-4
2.75
6.15
2.85
mA
UNITS
V
V
V
mA
I
CC_NOCAB
V
EE
= 0V, M[x] = 1111 (Note 3)
V
EE
Supply Current
TERMINATOR INPUTS
Differential-Mode Impedance
V.35 Mode
Common-Mode Impedance
V.35 Mode
Differential-Mode Impedance
V.11 Mode
High-Impedance Leakage
Current
Differential Path Enable Time
Differential Path Disable Time
Common-Mode Path Enable Time
Common-Mode Path Disable
-2V
≤
V
CM
≤
+2V, all channels (Figure 1)
-2V
≤
V
CM
≤
+2V, all channels (Figure 2)
-7V
≤
V
CM
≤
+7V, all channels, except no-
cable mode (Figure 1)
-7V
≤
V
CM
≤
+7V, all channels, no-cable
mode, V
EE
= 0V, V
AB
≤
2V (Figure 1)
I
Z
-15V
≤
V
R_A
≤
+15V
-50
90
135
100
I
EE
104
153
104
115
110
165
110
Ω
Ω
Ω
+50
50
300
12
2
µA
µs
µs
µs
µs
2
_______________________________________________________________________________________
+5V Multiprotocol, Pin-Selectable
Cable Terminator
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +4.5V to +5.5V, V
EE
= -4V to -7.1V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C, V
CC
= +5V,
V
EE
= -5V, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
0.66 x
V
CC
0.33 x
V
CC
V
IN
= V
CC
or GND
Human Body Model
R_A, R_B to GND
All Other Pins
Air Gap Discharge IEC 61000-4-2
Contact Discharge IEC 61000-4-2
Human Body Model
-1
±15
±10
±6
±2
kV
kV
+1
TYP
MAX
UNITS
LOGIC INPUTS (M0, M1, M2,
LATCH,
DCE/DTE)
Input High Voltage
Input Low Voltage
Logic Input Current
ESD PROTECTION
V
IH
V
IL
I
IN
V
V
µA
MAX13174E
Note 2:
All parameters tested at a single temperature. Specifications over temperature are guaranteed by design.
Note 3:
M[x] is the input bus DCE/DTE, M2, M1, M0.
Typical Operating Characteristics
(V
CC
= +5V, V
EE
= -5V, T
A
= +25°C, unless otherwise noted.)
MAX13174E toc01
109
108
IMPEDANCE (I)
107
106
105
104
103
102
101
100
0
V
CM
= +7V
10
20
30
V
CM
= -7V
V
CM
= 0V
MAX13174E toc02
109
108
IMPEDANCE (I)
107
106
105
104
103
102
101
100
109
108
IMPEDANCE (I)
107
106
105
104
103
102
101
100
40
50
60
70
-7
-5
-3
-1
1
3
5
7
4.5
4.7
4.9
5.1
5.3
5.5
TEMPERATURE (NC)
V
CM
(V)
V
CC
(V)
_______________________________________________________________________________________
3
MAX13174E toc03
110
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
vs. TEMPERATURE
110
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
vs. COMMON-MODE VOLTAGE (V
CM
)
110
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
vs. SUPPLY VOLTAGE (V
CC
)
+5V Multiprotocol, Pin-Selectable
Cable Terminator
MAX13174E
Typical Operating Characteristics (continued)
(V
CC
= +5V, V
EE
= -5V, T
A
= +25°C, unless otherwise noted.)
MAX13174E toc04
109
108
IMPEDANCE (I)
107
106
105
104
103
102
101
100
-7
-6
V
EE
(V)
-5
160
IMPEDANCE (I)
155
150
145
140
135
V
CM
= +2V
MAX13174E toc05
160
IMPEDANCE (I)
155
150
145
140
135
V
CM
= -2V
-4
0
10
20
30
40
50
60
70
-2
-1
0
V
CM
(V)
1
2
TEMPERATURE (NC)
V.35 COMMON-MODE IMPEDANCE
vs. SUPPLY VOLTAGE (V
CC
)
MAX13174E toc07
MAX13174E toc08
160
IMPEDANCE (I)
155
150
145
140
135
4.5
4.7
4.9
V
CM
= +2V
900
800
SUPPLY CURRENT (FA)
700
600
500
400
300
200
100
0
I
EE
I
CC
160
IMPEDANCE (I)
155
150
145
140
135
V
CM
= +2V
V
CM
= -2V
V
CM
= -2V
5.1
5.3
5.5
-7
-6
V
EE
(V)
-5
-4
0
10
20
30
40
50
60
70
V
CC
(V)
TEMPERATURE (NC)
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
MAGNITUDE vs. FREQUENCY
MAX13174E toc10
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
PHASE vs. FREQUENCY
10
5
PHASE (DEGREES)
0
-5
-10
-15
-20
-25
-30
-35
MAX13174E toc11
120
100
IMPEDANCE (I)
80
60
40
20
0
15
0.1
1
10
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
4
_______________________________________________________________________________________
MAX13174E toc09
165
165
V.35 COMMON-MODE IMPEDANCE
vs. SUPPLY VOLTAGE (V
EE
)
1000
HI-Z MODE SUPPLY CURRENT
vs. TEMPERATURE
MAX13174E toc06
110
V.11 OR V.35 DIFFERENTIAL IMPEDANCE
vs. SUPPLY VOLTAGE (V
EE
)
V.35 COMMON-MODE IMPEDANCE
vs. TEMPERATURE
165
165
V.35 COMMON-MODE IMPEDANCE
vs. COMMON-MODE VOLTAGE (V
CM
)
+5V Multiprotocol, Pin-Selectable
Cable Terminator
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12, 13
14
15
16
17
18
19
20
21
22
23
24
NAME
M0
V
EE
R1C
R1B
R1A
R2A
R2B
R2C
R3A
R3B
R3C
GND
V
CC
R4B
R4A
R5B
R5A
R6A
R6B
LATCH
DCE/DTE
M2
M1
Mode-Select Input (Table 1)
Negative Supply Voltage (typically connected to V
EE
of MAX13170E). Bypass to GND with a 0.1µF capacitor.
Load 1, Center Tap
Load 1, Node B
Load 1, Node A
Load 2, Node A
Load 2, Node B
Load 2, Center Tap
Load 3, Node A
Load 3, Node B
Load 3, Center Tap
Ground
+5V Supply Voltage. Bypass to GND with a 0.1µF capacitor.
Load 4, Node B
Load 4, Node A
Load 5, Node B
Load 5, Node A
Load 6, Node A
Load 6, Node B
Latch Signal Input. When
LATCH
is low, the input latches are transparent. When
LATCH
is high, the data
at the mode-select inputs are latched.
DCE/DTE Mode-Select Input (Table 1)
Mode-Select Input (Table 1)
Mode-Select Input (Table 1)
FUNCTION
MAX13174E
Detailed Description
The MAX13174E contains six pin-selectable multiproto-
col cable termination networks (Figure 3). Each network
is capable of terminating V.11 (RS-422, RS-530,
RS-530A, RS-449, V.36, and X.21) with a 100Ω differen-
tial load, V.35 with a T-network load, or V.28 (RS-232)
and V.10 (RS-423) with an open-circuit load for use with
transceivers that have on-chip termination. The termina-
tion protocol can be selected by the serial interface
cable wiring or by pin control. The MAX13174E
replaces discrete resistor termination networks and
expensive relays required for multiprotocol termination,
saving space and cost.
The MAX13174E terminator is designed to form a com-
plete +5V cable- or pin-selectable multiprotocol DCE/DTE
interface port when used with the MAX13170E and
MAX13172E transceivers. The MAX13174E terminator
can use the V
EE
power generated by the MAX13170E
charge pump, simplifying system design. The
MAX13174E/MAX13170E/MAX13172E are functionally
compatible with the MXL1344A/MXL1543/MXL1544/
MAX3175.
Termination Modes
The termination networks in the MAX13174E can be set
to one of three modes: V.11, V.35, or high impedance.
As shown in Figure 4, in V.11 mode, switch S1 is closed
and switch S2 is open, presenting 104Ω across termi-
nals A and B. In V.35 mode, switches S1 and S2 are
both closed, presenting a T-network with 104Ω differen-
tial impedance and 153Ω common-mode impedance.
In high-impedance mode, switches S1 and S2 are both
open, presenting a high impedance across terminals A
and B suitable for V.28 and V.10 modes.
_______________________________________________________________________________________
5
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