MAX3172CAI-T Maxim Integrated Products, MAX3172CAI-T Datasheet

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MAX3172CAI-T

Manufacturer Part Number
MAX3172CAI-T
Description
RS-422/RS-485 Interface IC
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX3172CAI.pdf (19 pages)

Specifications of MAX3172CAI-T

Dc
0501
Lead Free Status / Rohs Status
No
The MAX3172/MAX3174 contain five software-selec-
table multiprotocol cable termination networks. Each
network is capable of terminating V.11 (RS-422, RS-
530, RS-530A, RS-449, V.36, and X.21) with a 100Ω dif-
ferential 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 having on-chip termination.
The devices replace discrete resistor termination net-
works and expensive relays required for multiprotocol
termination. The MAX3172/MAX3174, along with the
MAX3170 and MAX3171/MAX3173, form a complete
+3.3V software-selectable DTE or DCE interface port
supporting V.11/RS-422, RS-530, RS-530A, V.36/RS-
449, V.35, V.28/RS-232, V.10/RS-423, and X.21 serial
interfaces.
In addition to the five multiprotocol cable termination
networks, the MAX3172/MAX3174 contain a 1Tx/1Rx
multiprotocol transceiver designed to use V+ and V-
generated by the MAX3171/MAX3173 charge pump.
The MAX3172/MAX3174 transceiver is software selec-
table between V.10 and V.28 modes of operation. The
MAX3172 features 10µs deglitching on the V.10/V.28
receiver input to facilitate unterminated operation, while
the MAX3174 is used in applications that do not require
deglitching on the serial handshake signals. These
devices are available in a 28-pin SSOP package.
________________________Applications
19-1801; Rev 2; 6/04
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Data Networking
CSU and DSU
Data Routers
MAX3171
MAX3173
+3.3V Multiprotocol Software-Selectable
________________________________________________________________ Maxim Integrated Products
CTS
13 5
R3
DSR
R2
10 8
PCI Cards
Telecommunications
General Description
R1
Cable Terminators and Transceivers
DCD
D3
22 6
DTR
D2
23 20 19 4
RTS
D1
LL
1
7
MAX3172
MAX3174
DB-25 CONNECTOR
R4
D4
Pin Configuration appears at end of data sheet.
MAX3172CAI
MAX3174CAI
MAX3172EAI
Industry’s First +3.3V Multiprotocol Termination
Networks and Transceivers
Certified TBR-1 and TBR-2 Compliant
(NET1 and NET2)
Support V.28 (RS-232), V.11 (RS-422, RS-530, RS-
530A, RS-449, V.36, and X.21), V.10 and V.35
3V/5V Logic-Compatible I/O
Software-Selectable DTE/DCE
Replace Discrete Resistor Termination Networks
and Expensive Relays
10µs Receiver Input Deglitching (MAX3172 only)
Available in Small 28-Pin SSOP Package
Transmitter Output Fault Protected to ±15V,
Tolerates Cable Miswiring
PART
18
RXD
R3
16
3
RXC
R2
9 17
Typical Operating Circuit
R1
-40 C to +85 C
TEMP RANGE
Ordering Information
0 C to +70 C
0 C to +70 C
TXC SCTE
D3
12 15 11 24 14 2
D2
TXD
D1
MAX3170
Features
PIN-PACKAGE
28 SSOP
28 SSOP
28 SSOP
1

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MAX3172CAI-T Summary of contents

Page 1

... Software-Selectable DTE/DCE Replace Discrete Resistor Termination Networks and Expensive Relays 10µs Receiver Input Deglitching (MAX3172 only) Available in Small 28-Pin SSOP Package Transmitter Output Fault Protected to ±15V, Tolerates Cable Miswiring PART MAX3172CAI MAX3172EAI MAX3174CAI Pin Configuration appears at end of data sheet. DTR RTS LL D2 ...

Page 2

... Termination Network Inputs (applied individually) R_A, R_B ............................................................-15V to +15V Continuous Power Dissipation (T 28-Pin SSOP (derate 9.52mW/°C above +70°C) ........762mW Operating Temperature Range MAX3172CAI/MAX3174CAI ...............................0°C to +70°C MAX3172EAI...................................................-40°C to +85°C + 0.3V) Junction Temperature ......................................................+150°C CC Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300° ...

Page 3

... Figure 450 , C = 100pF, Figure 3 PLH PHL R = 450 , C = 100pF, Figure PLH MAX3172 , t Figure 4 PLH MAX3174 MAX3172CAI - PHL Figure 4 MAX3172EAI t | PLH MAX3174 = +25°C, unless otherwise noted. See Note 2 for V+ A MIN TYP 0.1 -100 240 5 +10V 20 40 +15V 240 4.0 4.4 0.9 ...

Page 4

... MAX3172CAI C = 2500pF L MAX3174CAI measured from +3V to -3V or -3V to +3V, MAX3172EAI Figure 150pF measured from L L +3V to -3V or -3V to +3V, Figure PLH - | IL IH MAX3172 , t Figure 4 PLH MAX3174 MAX3172CAI - Figure 4 MAX3172EAI | MAX3174 MIN TYP MAX UNITS 5.0 5 V/µ µs 100 ns 1.1 0.8 V 2.0 1 ...

Page 5

Multiprotocol Software-Selectable Cable Terminators and Transceivers (V = +3.3V (see Note 2 in Electrical Characteristics table V.28 SLEW RATE vs. LOAD CAPACITANCE +SLEW -SLEW ...

Page 6

Multiprotocol Software-Selectable Cable Terminators and Transceivers (V = +3.3V (see Note 2 in Electrical Characteristics table V.11/V.35 DIFFERENTIAL-MODE IMPEDANCE vs. V+ 105.0 104.5 104.0 103.5 103.0 4.2 4.4 4.6 4.8 V+ (V) V.35 COMMON-MODE IMPEDANCE vs. TEMPERATURE ...

Page 7

Multiprotocol Software-Selectable Cable Terminators and Transceivers A R1 52Ω OHMMETER 52Ω ±7V OR ±2V CM Figure 1. V.11 or V.35 Differential Impedance Measurement Figure 3. V.10/V.28 Driver Test Circuit _______________________________________________________________________________________ ...

Page 8

Multiprotocol Software-Selectable Cable Terminators and Transceivers PIN NAME R5A 6 R5B 7 T4IN 8 R4OUT 9,18, 22 GND 10 R4B 11 R4A 12 R3C 13 R3B 14 R3A 15 ...

Page 9

Multiprotocol Software-Selectable Cable Terminators and Transceivers Table 1. Termination Mode Selection MODE M2 M1 V.10/RS-423 0 0 RS-530A 0 0 RS-530 RS-449/V. V.28/RS-232 Cable 1 1 ...

Page 10

Multiprotocol Software-Selectable Cable Terminators and Transceivers Table 3. R4/T4 Mode-Select Table PROTOCOL M2 Not Used (Default V.11) 0 RS-530A 0 RS-530 0 X.21 0 V.35 1 RS-449/V.36 1 V.28/RS-232 1 No Cable 1 Not Used (Default V.11) 0 RS-530A ...

Page 11

Multiprotocol Software-Selectable Cable Terminators and Transceivers A R1 52Ω 127Ω S2 OFF R2 52Ω B V.11 MODE Figure 5. MAX3172/MAX3174 Termination Network Configurations BALANCED INTERCONNECTING GENERATOR CABLE CABLE TERMINATION A′ A 100Ω MIN B′ B ...

Page 12

Multiprotocol Software-Selectable Cable Terminators and Transceivers A′ R1 52Ω 52Ω B′ C′ Figure 7. V.11 Termination and Internal Resistance Networks GENERATOR 50Ω 125Ω 50Ω Figure 8. Typical V.35 Interface with a minimum of a 100Ω resistor ...

Page 13

Multiprotocol Software-Selectable Cable Terminators and Transceivers A′ S1 B′ C′ Figure 9. V.35 Termination and Internal Resistance Networks MAX3172 MAX3174 DRIVER R3 127Ω S2 R_C C1 100pF Figure 10. V.35 Driver In Figure 9, the MAX3172/MAX3174 are used to ...

Page 14

Multiprotocol Software-Selectable Cable Terminators and Transceivers A′ R1 52Ω 52Ω B′ C′ Figure 11. V.28 Termination and Internal Resistance Networks UNBALANCED INTERCONNECTING CABLE GENERATOR CABLE TERMINATION A A′ C C′ Figure 12. Typical V.28 and V.10 ...

Page 15

Multiprotocol Software-Selectable Cable Terminators and Transceivers A′ 30kΩ R8 5kΩ R6 10kΩ 10kΩ R4 30kΩ C′ GND Figure 14. V.10 Internal Resistance Networks The MAX3174 does not have this glitch rejection and can be operated ...

Page 16

Multiprotocol Software-Selectable Cable Terminators and Transceivers CTS(DTE) DTR(DTE) RTS(DCE) DSR(DCE) DSR(DTE) DCD(DTE) RTS(DTE) DTR(DCE) DCD(DCE) CTS(DCE MAX3171 MAX3173 Figure 15. Multiprotocol DCE/DTE Port 16 ...

Page 17

Multiprotocol Software-Selectable Cable Terminators and Transceivers SERIAL CONTROLLER D1 TXD SCTE D2 D3 TXC RXC RXD LL D1 RTS DTR D2 D3 DCD DSR CTS Figure 16. DCE-TO-DTE X.21 Interface ______________________________________________________________________________________ DTE MAX3170 MAX3172 MAX3172 MAX3174 MAX3174 103Ω TXD ...

Page 18

Multiprotocol Software-Selectable Cable Terminators and Transceivers Pin Configuration TOP VIEW R5A 5 24 MAX3172 R5B 6 23 MAX3174 T4IN 7 22 R4OUT 8 21 GND 9 ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2004 Maxim Integrated Products ...

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