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PDF MAX13174E Data sheet ( Hoja de datos )
| Número de pieza | MAX13174E | |
| Descripción | Pin-Selectable Cable Terminator | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4742; Rev 0; 7/09
+5V Multiprotocol, Pin-Selectable
Cable Terminator
General Description
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 VEE 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.
Features
o Supports V.11 and V.35 Termination
o Pin-Selectable Termination
o Pin-Selectable DCE/DTE Support
o Replaces Discrete Resistor Termination Networks
and Expensive Relays
o Available in 24-Pin SSOP Package
o Certified TBR-1 and TBR-2-Compliant Chipset
(NET1 and NET2)—Pending Completion of Testing
Data Networking
CSU and DSU
Data Routers
Applications
PCI Cards
Telecommunication Equipment
Data Switches
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX13174ECAG+
0°C to +70°C
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
MAX13172E
R1
T3
T2
T1
R3
R2
MAX13170E
R1
T3
T2
T1
MAX13174E
18 13 5 10 8
22 6 23 20 19 4
1 7 16 3 9 17
12 15 11 24 14 2
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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.
1 page  
+5V Multiprotocol, Pin-Selectable
Cable Terminator
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
Pin Description
NAME
M0
VEE
R1C
R1B
R1A
R2A
R2B
R2C
R3A
R3B
R3C
GND
VCC
R4B
R4A
R5B
R5A
R6A
R6B
LATCH
DCE/DTE
M2
M1
FUNCTION
Mode-Select Input (Table 1)
Negative Supply Voltage (typically connected to VEE 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)
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
www.DaMtaASXhe1e3t41U7.2coEmtransceivers. The MAX13174E terminator
can use the VEE 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
5 Page 
+5V Multiprotocol, Pin-Selectable
Cable Terminator
A′ A
R1 MAX13174E
52Ω
R5
55kΩ
R8
5kΩ R6
11kΩ
MAX13170E
RECEIVER
S1
S2
R3
124Ω
R2
52Ω
B′
S3
+-
1.4V
R7
11kΩ
R4
B
55kΩ
S1
C′ S2
GND
Figure 10. V.28 Termination and Internal Resistance Networks
have extra protection against static electricity. Maxim’s
engineers have developed state-of-the-art structures to
protect these pins against an ESD of ±15kV (Human
Body Model) without damage. The ESD structures with-
stand high ESD in all states: normal operation, shut-
down, and powered down. After an ESD event, the
MAX13174E keeps working without latchup or damage.
ESD protection can be tested in various ways. The
Electrical Characteristics table shows the limits, and
each device is characterized for protection to the fol-
lowing methods:
• Human Body Model
• Contact Method specified in IEC 61000-4-2
• Air Gap Discharge Method specified in IEC 61000-4-2
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Human Body Model
Figure 12a shows the Human Body Model, and Figure
12b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
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IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
the performance of finished equipment. However, it
does not specifically refer to integrated circuits. The
MAX13174E helps equipment designs to meet IEC
61000-4-2 without the need for additional ESD-protec-
tion components.
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Figure 12c shows
the IEC 61000-4-2 model, and Figure 12d shows the
current waveform for the IEC 61000-4-2 ESD Contact
Discharge test.
Compliance Testing
A European Standard EN 45001 test report for the
MAX13170E, MAX13172E, and MAX13174E chipset will
be available from Maxim upon completion of testing.
Contact Maxim Quality Assurance for a copy of the report.
______________________________________________________________________________________ 11
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| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX13174E.PDF ] | |
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