LL A (141) 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 TM A (142) SGND (102) SHIELD (101) RL A (140) RTS A (105) RTS B DTR A (108) DTR B DCD A (109) DCD B DSR A (107) DSR B CTS A (106) CTS B LTC1343 Software-Selectable Multiprotocol Transceiver FEATURES DESCRIPTIO n Software-Selectable Transceiver Supports: The LTC 1343 is a 4-driver/4-receiver multiprotocol trans- RS232, RS449, EIA-530, EIA-530-A, V.35, V.36, ceiver that operates from a single 5V supply. Two LTC1343s X.21 form the core of a complete software-selectable DTE or DCE n NET1 and NET2 Compliant interface port that supports the RS232, RS449, EIA-530, n Software-Selectable Cable Termination Using EIA-530-A, V.35, V.36 or X.21 protocols. Cable termination the LTC1344 may be implemented using the LTC1344 software-selectable n 4-Driver/4-Receiver Configuration Provides a cable termination chip or by using existing discrete designs. Complete 2-Chip DTE or DCE Port The LTC1343 runs from a single 5V supply using an internal n Operates from Single 5V Supply charge pump that requires only five space saving surface mount n Internal Echoed Clock and Loop-Back Logic capacitors. The mode pins are latched internally to allow sharing U of the select lines between multiple interface ports. APPLICATIO S Software-selectable echoed clock and loop-back modes help n Data Networking eliminate the need for external glue logic between the serial n CSU and DSU controller and line transceiver. The part features a flow- n Data Routers through architecture to simplify EMI shielding and is available , LTC and LT are registered trademarks of Linear Technology Corporation. in the 44-lead SSOP surface mount package. TYPICAL APPLICATIO DTE Multiprotocol Serial Interface with DB-25 Connector CTS DSR DCD DTR RTS RL TM RXD RXC TXC SCTE TXD LL LTC1343 LTC1343 D4 D3 D2 D1 D2 D1 D4 D3 R3 R2 R1 R4 R4 R3 R2 R1 LTC1344 13 5 22 6 10 8 23 20 19 4 21 1 7 25 16 3 9 17 12 15 11 24 14 2 18 DB-25 CONNECTOR 1343 TA01 1 U ULTC1343 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) TOP VIEW Supply Voltage ....................................................... 6.5V ORDER PART + V 1 44 C2 DD Input Voltage NUMBER + C1 2 CHARGE PUMP 43 C2 Transmitters ........................... 0.3V to (V + 0.3V) CC PWRV 3 42 V CC EE Receivers............................................... 18V to 18V C1 4 41 PGND LTC1343CGW D1 5 40 GND Logic Pins .............................. 0.3V to (V + 0.3V) CC LTC1343IGW D2 6 D1 39 D1 A Output Voltage D3 7 38 D2 A D2 Transmitters ................. (V 0.3V) to (V + 0.3V) EE DD V 8 37 D2 B CC Receivers................................ 0.3V to (V + 0.3V) D4 9 36 D3 A CC D3 D4EN 10 35 D3 B Logic Pins .............................. 0.3V to (V + 0.3V) CC INVERT 11 34 D4 A V ........................................................ 10V to 0.3V D4 EE R1EN 12 33 D4 B V ....................................................... 0.3V to 10V DD R1O 13 32 R1 A R1 R2O 14 31 R1 B Short-Circuit Duration R3O 15 30 R2 A Transmitter Output ..................................... Indefinite R2 R4O 16 29 R2 B Receiver Output .......................................... Indefinite M0 17 28 R3 A R3 V .................................................................. 30 sec 18 27 R3 B EE M1 19 26 R4 A M2 Operating Temperature Range R4 20 CTRL/CLK 25 423 SET LTC1343C .............................................. 0 C to 70 C 21 DCE/DTE 24 EC LTC1343I........................................... 40 C to 85 C LATCH 22 23 LB Storage Temperature Range ................ 65 C to 150 C GW PACKAGE 44-LEAD PLASTIC SSOP Lead Temperature (Soldering, 10 sec)................. 300 C T = 150 C, q = 65 C/ W JMAX JA Consult factory for Military grade parts. The l denotes specifications which apply over the full operating ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T = 25 C. V = 5V (Notes 2, 3) A CC SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies I V Supply Current (DCE Mode, V.10 Mode, No Load 12 mA CC CC All Digital Pins = GND or V ) V.10 Mode, Full Load l 80 150 mA CC RS530, RS530-A, X.21 Modes, No Load 80 mA RS530, RS530-A, X.21 Modes, Full Load l 160 200 mA V.35 Mode, No Load 20 mA V.35 Mode, Full Load l 115 160 mA V.28 Mode, No Load 20 mA V.28 Mode, Full Load l 30 90 mA No-Cable Mode l 0.05 1 mA P Internal Power Dissipation (DCE Mode, V.10 Mode, Full Load 400 mW D ) RS530, RS530-A, X.21 Modes, Full Load 680 mW All Digital Pins = GND or V CC V.35 Mode, Full Load 500 mW V.28 Mode, Full Load 150 mW + V Positive Charge Pump Output Voltage Any Mode, No Load l 8.5 9.1 V V.28 Mode, with Load l 8.0 7.0 V V Negative Charge Pump Output Voltage V.28 Mode, Full Load l 7.8 8.4 V V.35 Mode, Full Load l 5.8 6.7 V 40 C T 85 C l 5.5 V A V.10, RS530, RS530A, X.21 Modes, Full Load l 5.0 6.1 V 40 C T 85 C l 4.8 V A 2 U W U W U WW