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MAX3173CAIMAXIMN/a45avai+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control Transceivers
MAX3171CAIMAXIMN/a20avai+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control Transceivers


MAX3173CAI ,+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control Transceiversapplications that do not require deglitching on MAX3173 CAI 0°C to +70°C 28 SSOP the serial handsha ..
MAX3173CAI+ ,+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control TransceiversELECTRICAL CHARACTERISTICS(V = 3.3V ±5%; C1 = C2 = 1µF, C3 = C4 = C5 = 3.3µF, and T = T to T , unle ..
MAX3174CAI ,#.3V Multiprotocol Software-Selectable Cable Terminators and TransceiversFeaturesThe MAX3172/MAX3174 contain five software-selec- Industry’s First +3.3V Multiprotocol Term ..
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MAX317CSA ,Precision, CMOS Analog SwitchesApplicationsMAX317CPA 0°C to +70°C 8 Plastic DIPSample-and-Hold CircuitsMAX317CSA 0°C to +70°C 8 SO ..
MAX317ESA ,Precision, CMOS Analog SwitchesApplicationsMAX317CPA 0°C to +70°C 8 Plastic DIPSample-and-Hold CircuitsMAX317CSA 0°C to +70°C 8 SO ..
MAX639ESA+ ,5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC ConvertersMAX639/MAX640/MAX65319-4505; Rev 3; 8/975V/3.3V/3V/Adjustable, High-Efficiency, Low I , Step-Down D ..
MAX639ESA+T ,5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC ConvertersELECTRICAL CHARACTERISTICS(V+ = 9V for the MAX639, V+ = 5V for the MAX640/MAX653, I = 0mA, T = T to ..
MAX639ESA+T ,5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC ConvertersFeaturesThe MAX639/MAX640/MAX653 step-down switching' High Efficiency for a Wide Range of Load Curr ..
MAX639ESA-T ,5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC ConvertersApplicationsMAX639ESA -40°C to +85°C 8 SO9V Battery to 5V, 3.3V, or 3V ConversionMAX639MJA -55°C to ..
MAX640 ,5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC ConvertersApplicationsMAX639ESA -40°C to +85°C 8 SO9V Battery to 5V, 3.3V, or 3V ConversionMAX639MJA -55°C to ..
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MAX3171CAI-MAX3173CAI
+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control Transceivers
General Description
The MAX3171/MAX3173 are three-driver/three-receiver
multiprotocol transceivers that operate from a single
+3.3V supply. The MAX3171/MAX3173, along with the
MAX3170 and MAX3172/MAX3174, form a complete
software-selectable data terminal equipment (DTE) or
data communications equipment (DCE) interface port
that supports V.28 (RS-232) and V.10/V.11 (RS-449,
V.36, EIA-530, EIA-530-A, X.21, RS-423) protocols. The
MAX3171/MAX3173 transceivers carry the serial inter-
face control signaling; the MAX3170 transceivers carry
the clock and data signals. The MAX3172/
MAX3174 have an extra transceiver for applications
requiring four transceivers for control signaling.
An internal charge pump and proprietary low-dropout
transmitter output stage allow V.28, V.11, and V.10
compliant operation from a single +3.3V supply. A no-
cable mode is entered when all mode pins (M0, M1,
and M2) are pulled high or left unconnected. In no-
cable mode, supply current decreases to 2mA and all
transmitter and receiver outputs are disabled (high
impedance). Short-circuit limiting and thermal-shut-
down circuits protect the drivers against excessive
power dissipation.
The MAX3171 features 10µs deglitching on the
V.10/V.11/V.28 receiver inputs. The MAX3173 is avail-
able for applications that do not require deglitching on
the serial handshake signals.
These parts require only four surface-mount capacitors
for charge-pump operation in addition to supply
bypassing.
Features
Industry’s First +3.3V Multiprotocol TransceiverCertified TBR-1 and TBR-2 Compliant
(NET1 and NET2)
Supports V.28 (RS-232) and V.10/V.11 (RS-449,
V.36, EIA-530, EIA-530-A, X.21, RS-423) Protocols
3V/5V Logic CompatibilitySoftware-Selectable DCE/DTETrue Fail-Safe Receiver OperationAvailable in Small 28-Pin SSOP Package10µs Receiver Input Deglitching (MAX3171 only)All Transmitter Outputs Fault Protected to ±15V,
Tolerate Cable Miswiring
________________________Applications

Data NetworkingPCI Cards
CSU and DSUTelecommunications
Data Routers
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers

19-1703; Rev 1; 8/01
Ordering Informationypical Operating Circuit
Pin Configuration appears at end of data sheet
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC= 3.3V ±5%; C1 = C2 = 1µF, C3 = C4 = C5 = 3.3µF, and TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC
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.
Note 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
(All voltages referenced to GND unless otherwise noted.)
Supply Voltages
VCC......................................................................-0.3V to +4V
V+ (Note 1)..........................................................-0.3V to +7V
V- (Note 1)...........................................................+0.3V to -7V
V+ to V- (Note 1)...............................................................13V
Logic Input Voltages
M0, M1, M2, DCE/DTE,T_IN...............................-0.3V to +6V
Logic Output Voltages
R_OUT...................................................-0.3V to (VCC+ 0.3V)
Short-Circuit Duration............................................Continuous
Transmitter Outputs
T_OUT_...............................................................-15V to +15V
Short-Circuit Duration........................................................60s
Receiver Inputs
R_IN_..................................................................-15V to +15V
Continuous Power Dissipation (TA= +70°C)
28-Pin SSOP (derate 11.1mW/°C above +70°C)........889mW
Operating Temperature Range
MAX3171CAI/MAX3173CAI...............................0°C to +70°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
ELECTRICAL CHARACTERISTICS (continued)

(VCC= 3.3V ±5%; C1 = C2 = 1µF, C3 = C4 = C5 = 3.3µF, and TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
ELECTRICAL CHARACTERISTICS (continued)

(VCC= 3.3V ±5%; C1 = C2 = 1µF, C3 = C4 = C5 = 3.3µF, and TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC
Note 2:
V+ and V- are also used to supply the MAX3172/MAX3174. The MAX3171/MAX3173 are tested with additional current load
on V+ and V- to capture the effect of loading from the MAX3172/MAX3174 in all operation modes.
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers

V.10/V.11 MODE SUPPLY CURRENT vs.
DATA RATE
MAX3171 toc01
DATA RATE (kbps)
SUPPLY CURRENT (mA)
0.0010.0110k100k0.11k1000k
V.28 MODE SUPPLY CURRENT
vs. DATA RATE

MAX3171 toc02
DATA RATE (kbps)
SUPPLY CURRENT (mA)
0.0010.0110k100k0.11k1000k
V.11 LOADED DIFFERENTIAL
OUTPUT VOLTAGE vs. TEMPERATURE
MAX3171 toc03
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
Typical Operating Characteristics

(VCC= +3.3V, C1 = C2 = 1.0µF, C3 = C4 = C5 = 3.3µF, TA= +25°C, unless otherwise noted.)
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
Typical Operating Characteristics (continued)

(VCC= +3.3V, C1 = C2 = 1.0µF, C3 = C4 = C5 = 3.3µF, TA= +25°C, unless otherwise noted.)
Figure 1. V.11 DC Test CircuitFigure 2. V.11 AC Test Circuitest Circuits
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceiver

Figure 3. V.10/V.28 Driver Test Circuit
Figure 4. V.10/V.28 Receiver Test Circuit
Test Circuits (continued)
MAX3171/MAX3173
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
Detailed Description

The MAX3171/MAX3173 are three-driver/three-receiver
multiprotocol transceivers that operate from a single
+3.3V supply. The MAX3171/MAX3173, along with the
MAX3170 and MAX3172/MAX3174, form a complete
software-selectable DTE or DCE interface port that sup-
ports the V.28 (RS-232), V.10/V.11 (RS-449, V.36, EIA-
530, EIA-530-A, X.21, RS-423), and V.35 protocols. The
MAX3171/MAX3173 carry the control signals, while the
MAX3170 transceiver carries the high-speed clock and
data signals. The MAX3172/MAX3174 provide termina-
tion for the clock and data signals and have an extra
transceiver for applications requiring four transceivers
The MAX3171/MAX3173 feature a 2mA no-cable mode,
true fail-safe operation, and thermal shutdown circuitry.
Thermal shutdown protects the drivers against exces-
sive power dissipation. When activated, the thermal
shutdown circuitry places the driver outputs into a high-
impedance state.
Mode Selection

The state of mode select pins M0, M1, and M2 determines
which serial interface protocol is selected (Table 1). The
state of the DCE/DTEinput determines whether the trans-
ceivers will be configured as a DTEserial port or a DCE
serial port. When the DCE/DTEinput is logic HIGH, dri-
ver T3 is activated and receiver R1 is disabled. When
the DCE/DTEinput is logic LOW, driver T3 is disabled
and receiver R1 is activated. M0, M1, M2, and
DCE/DTEare internally pulled up to VCCto ensure logic
HIGH if left unconnected.
The MAX3171/MAX3173’s mode can be selected
through software control of the M0, M1, M2, and
DCE/DTEinputs. Alternatively, the mode can be select-
ed by shorting the appropriate combination of mode
control inputs to GND (the inputs left floating will be
internally pulled up to VCC). If the M0, M1, and M2
mode inputs are all unconnected, the MAX3171/
MAX3173 will enter no-cable mode.
Z = High impedance
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