MXL1344A TXD A (103) TXD B SCTE A (113) SCTE B TXC A (114) TXC B RXC A (115) RXC B RXD A (104) RXD B SG (102) SHIELD (101) RTS A (105) RTS B DTR A (108) DTR B DCD A (107) DCD B DSR A (109) DSR B CTS A (106) CTS B LL A (141) 19-1775 Rev 0 2/01 +5V Multiprotocol, Software-Selectable Cable Terminator General Description Features The MXL1344A contains six software-selectable, multi- Certified TBR-1 and TBR-2-Compliant Chipset protocol cable termination networks. Each network is (NET1 and NET2)Pending Completion of capable of terminating V.11 (RS-422, RS-530, RS-530A, Testing RS-449, V.36 and X.21) with a 100 differential load, Supports V.10 (RS-423), V.11 (RS-422, RS-530, 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- RS-530A, RS-449, V.36, and X.21), V.28 (RS-232) ceivers having on-chip termination. The termination pro- and V.35 Termination tocol can be selected by the serial interface cable Cable- or Software-Selectable Termination wiring or by software control. The MXL1344A replaces discrete resistor termination networks and expensive Cable- or Software-Selectable DTE/DCE relays required for multiprotocol termination, saving Replaces Discrete Resistor Termination Networks space and cost. and Expensive Relays The MXL1344A terminator is designed to form a com- Available in Small 24-Pin SSOP Package plete +5V cable- or software-selectable multiprotocol DCE/DTE interface port when used with the MXL1543 Applications and MXL1544/MAX3175 transceiver ICs. The MXL1344A terminator can use the V power generated by the EE Data Networking PCI Cards MXL1543 charge pump, simplifying system design. The CSU and DSU Telecommunication Equipment MXL1344A, MXL1543, and MXL1544/MAX3175 are pin- for-pin compatible with the LTC1344A, LTC1543, and Data Routers Data Switches LTC1544, but for proper operation the entire Maxim chipset must be used without substituting other manu- Ordering Information facturer s parts on a chip-by-chip basis. PART TEMP. RANGE PIN-PACKAGE The MXL1344A is available in a 24-pin SSOP package MXL1344ACAG 24 SSOP 0C to +70C and is specified for the 0C to +70C commercial tem- perature range. Pin Configuration appears at end of data sheet. Typical Operating Circuit LL CTS DSR DCD DTR RTS RXD RXC TXC SCTE TXD MXL1544/ MXL1543 D4 D3 D2 D1 D3 D2 D1 R4 R3 R2 R1 MAX3175 R3 R2 R1 MXL1344A 18 13 5 10 8 22 6 23 20 19 4 1 7 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.+5V Multiprotocol, Software-Selectable Cable Terminator ABSOLUTE MAXIMUM RATINGS All Voltages to GND Unless Otherwise Noted Continuous Power Dissipation (T = +70C) A Supply Voltages 24-Pin SSOP (derate 8mW/C above +70C) ...............640mW V ........................................................................-0.3V to +6V Operating Temperature Range...............................0C to +70C CC V .........................................................................+0.3V to -7V Die Temperature ..............................................................+150C EE Logic Input Voltages Storage Temperature Range .............................-65C to +150C M0, M1, M2, DCE/DTE, LATCH.............................-0.3V to +6V Lead Temperature (soldering, 10s) .................................+300C Termination Network Inputs R A, R B ..............................................................-15V to +15V R A to R B........................................................................15V 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 = +5V 5%, V = -5V 5%, T = 0C to 70C, unless otherwise noted. Typical values are at T = +25C, V = +5V, V = -5V, CC EE A A CC EE unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS V Supply Current I All logic inputs = GND or V 0.4 1.0 mA CC CC CC TERMINATOR PINS Differential-Mode Impedance -2V V +2V, all loads, Figure 1 90 104 110 CM V.35 Mode Common-Mode Impedance -2V V +2V, all loads, Figure 2 135 153 165 CM V.35 Mode V = 0V, all loads 100 104 110 CM Differential-Mode Impedance V.11 Mode -7V V +7V, all loads, T = +25C 100 104 CM A High-Impedance Leakage I -7V V +7V, all loads -50 50 A Z CM Current LOGIC INPUTS (M0, M1, M2, LATCH, DCE/DTE) 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 10 A IH IL IN CC 2 MXL1344A