MAX3172/MAX3174 19-1801 Rev 2 6/04 +3.3V Multiprotocol Software-Selectable Cable Terminators and Transceivers General Description Features The MAX3172/MAX3174 contain five software-selec- Industrys First +3.3V Multiprotocol Termination table multiprotocol cable termination networks. Each Networks and Transceivers network is capable of terminating V.11 (RS-422, RS- Certified TBR-1 and TBR-2 Compliant 530, RS-530A, RS-449, V.36, and X.21) with a 100 dif- ferential load, V.35 with a T-network load, or V.28 (NET1 and NET2) (RS-232) and V.10 (RS-423) with an open circuit load Support V.28 (RS-232), V.11 (RS-422, RS-530, RS- for use with transceivers having on-chip termination. 530A, RS-449, V.36, and X.21), V.10 and V.35 The devices replace discrete resistor termination net- works and expensive relays required for multiprotocol 3V/5V Logic-Compatible I/O termination. The MAX3172/MAX3174, along with the Software-Selectable DTE/DCE MAX3170 and MAX3171/MAX3173, form a complete +3.3V software-selectable DTE or DCE interface port Replace Discrete Resistor Termination Networks supporting V.11/RS-422, RS-530, RS-530A, V.36/RS- and Expensive Relays 449, V.35, V.28/RS-232, V.10/RS-423, and X.21 serial interfaces. 10s Receiver Input Deglitching (MAX3172 only) In addition to the five multiprotocol cable termination Available in Small 28-Pin SSOP Package networks, the MAX3172/MAX3174 contain a 1Tx/1Rx Transmitter Output Fault Protected to 15V, multiprotocol transceiver designed to use V+ and V- generated by the MAX3171/MAX3173 charge pump. Tolerates Cable Miswiring The MAX3172/MAX3174 transceiver is software selec- table between V.10 and V.28 modes of operation. The Ordering Information MAX3172 features 10s deglitching on the V.10/V.28 receiver input to facilitate unterminated operation, while PART TEMP RANGE PIN-PACKAGE the MAX3174 is used in applications that do not require MAX3172CAI 0 C to +70C 28 SSOP deglitching on the serial handshake signals. These devices are available in a 28-pin SSOP package. MAX3172EAI -40C to +85C 28 SSOP MAX3174 CAI 0 C to +70C 28 SSOP Applications Data Networking PCI Cards Pin Configuration appears at end of data sheet. CSU and DSU Telecommunications Data Routers Typical Operating Circuit CTS DSR DCD DTR RTS LL RXD RXC TXC SCTE TXD D3 D3 D2 D1 D2 D1 MAX3171 R3 R2 R1 R3 R2 R1 MAX3173 MAX3170 MAX3172 MAX3174 R4 D4 13 5 10 8 22 6 23 20 19 4 1 7 18 16 3 9 17 12 15 11 24 14 2 DB-25 CONNECTOR Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. CTS B CTS A DSR B DSR A DCD B DCD A DTR B DTR A RTS B RTS A SHIELD SG LL A RXD B RXD A RXC B RXC A TXC B TXC A SCTE B SCTE A TXD B TXD A+3.3V Multiprotocol Software-Selectable Cable Terminators and Transceivers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND unless otherwise noted.) Receiver Input Supply Voltages R4INA .................................................................-15V to +15V V ......................................................................-0.3V to +4V Termination Network Inputs (applied individually) CC V+ (Note 1)..........................................................-0.3V to +7V R A, R B ............................................................-15V to +15V V- (Note 1) ...........................................................+0.3V to -7V Continuous Power Dissipation (T = +70C) A V+ to V- (Note 1) ...............................................................13V 28-Pin SSOP (derate 9.52mW/C above +70C) ........762mW Logic Input Voltages Operating Temperature Range M0, M1, M2, DCE/DTE, INVERT, T4IN ................-0.3V to +6V MAX3172CAI/MAX3174CAI...............................0C to +70C Logic Output Voltages MAX3172EAI...................................................-40C to +85C R4OUT...................................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC Short-Circuit Duration............................................Continuous Storage Temperature Range .............................-65C to +150C Transmitter Outputs Lead Temperature (soldering, 10s) .................................+300C T4OUT ................................................................-15V to +15V Short-Circuit Duration ........................................................60s Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute 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 = +3.3V 5%, T = T to T . Typical values are at V = +3.3V, T = +25C, unless otherwise noted. See Note 2 for V+ CC A MIN MAX CC A and V- input voltage conditions.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS All modes V.10 receiver inactive 80 200 Supply Current I A CC (Digital Inputs = GND or V ) CC All modes V.10 receiver active 400 750 No-cable mode 0.2 1.0 V.10/V.11/V.28/V.35 modes unloaded 0.5 2.5 V+ Supply Current I mA V+ (T4IN = GND) V.10/V.11 modes T4OUT loaded 11.0 14.0 V.28/V.35 modes T4OUT loaded 3.0 5.0 No-cable mode -0.4 -1.0 V.10/V.11/V.28/V.35 modes unloaded -0.8 -2.5 V- Supply Current I mA V- (T4IN = V ) CC V.10/V.11 modes T4OUT loaded -11.0 -14.0 V.28/V.35 modes T4OUT loaded -3.0 -5.0 TERMINATOR NETWORKS (R A, R B) Differential-Mode Impedance Figure 1, -2V V +2V 90 104 110 CM V.35 Mode Common-Mode Impedance Figure 2, -2V V +2V 135 153 165 CM V.35 Mode Differential-Mode Impedance Figure 1, -7V V +7V 100 104 110 CM V.11 Mode Switches open, -15V V +15V, V = V , A B A Network OFF Impedance I 50 150 k Z V = GND or V floating B B LOGIC INPUTS (M0, M1, M2, INVERT, DCE/DTE, T4IN) Input High Voltage V 2.0 V IH Input Low Voltage V 0.8 V IL Logic Input Current I , I V = V or GND 1 A IH IL IN CC 2 MAX3172/MAX3174