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 (109) DCD B DSR A (107) DSR B CTS A (106) CTS B LL A (141) RI A (125) TM A (142) RL A (140) LTC1545 Software-Selectable Multiprotocol Transceiver FEATURES DESCRIPTIO n Software-Selectable Transceiver Supports: The LTC 1545 is a 5-driver/5-receiver multiprotocol trans- RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21 ceiver. The LTC1545 and LTC1543 form the core of a n TUV/Detecon Inc. Certified NET1 and NET2 complete software-selectable DTE or DCE interface port that Compliant (Test Report No. NET2/071601/98) supports the RS232, RS449, EIA530, EIA530-A, V.35, V.36 n TBR2 Compliant (Test Report No. CTR2/071601/98) or X.21 protocols. Cable termination may be implemented n Software-Selectable Cable Termination Using using the LTC1344A software-selectable cable termination the LTC1344A chip or by using existing discrete designs. n Complete DTE or DCE Port with LTC1543, LTC1344A The LTC1545 runs from a 5V supply and the charge pump on n Operates from Single 5V Supply with LTC1543 the LTC1543. The part is available in a 36-lead SSOP surface U mount package. APPLICATIO S n Data Networking n CSU and DSU n , LTC and LT are registered trademarks of Linear Technology Corporation. Data Routers TYPICAL APPLICATIO DTE or DCE Multiprotocol Serial Interface with DB-25 Connector RL TM RI LL CTS DSR DCD DTR RTS TXC SCTE TXD RXD RXC LTC1543 LTC1545 D3 D2 D1 D3 D2 D1 D5 D4 R3 R2 R1 R5 R4 R3 R2 R1 LTC1344A 21 25 * 18 13 5 226210 83 20 19 4 1 7 16 3 9 17 12 15 11 24 14 2 *OPTIONAL DB-25 CONNECTOR 1545 TA01 1 U ULTC1545 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) TOP VIEW Supply Voltage ORDER PART V ..................................................................... 6.5V V 1 36 V CC CC EE NUMBER V 2 35 GND DD V ........................................................ 10V to 0.3V EE D1 3 34 D1 A V ....................................................... 0.3V to 10V D1 DD D2 4 33 D1 B LTC1545CG Input Voltage D3 5 32 D2 A D2 LTC1545IG Transmitters ........................... 0.3V to (V + 0.3V) R1 6 31 D2 B CC R2 D3 30 D3/R1 A 7 Receivers............................................... 18V to 18V R3 8 29 D3/R1 B Logic Pins .............................. 0.3V to (V + 0.3V) CC D4 9 28 R2 A R1 Output Voltage R4 10 27 R2 B R2 Transmitters .................. (V 0.3V) to (V + 0.3V) M0 11 26 R3 A EE DD M1 12 25 R3 B Receivers................................ 0.3V to (V + 0.3V) R3 CC M2 13 24 D4 A Short-Circuit Duration DCE/DTE 14 D4 23 R4 A Transmitter Output ..................................... Indefinite D4ENB R4 22 R5 A 15 21 D5 A Receiver Output .......................................... Indefinite R4EN 16 R5 R5 17 20 V DD V .................................................................. 30 sec EE D5 18 D5 19 V CC Operating Temperature Range G PACKAGE LTC1545C .............................................. 0 C to 70 C 36-LEAD PLASTIC SSOP LTC1545I........................................... 40 C to 85 C T = 150 C, q = 65 C/ W JMAX JA Storage Temperature Range ................ 65 C to 150 C Consult factory for Military grade parts. Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. A V = 5V, V = 8V, V = 7V for V.28, 5.5V for V.10, V.11 (Notes 2, 3) CC DD EE SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies I V Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load l 2.7 5 mA CC CC All Digital Pins = GND or V ) RS530, RS530-A, X.21 Modes, Full Load l 110 150 mA CC V.28 Mode, No Load l 13 mA V.28 Mode, Full Load l 13 mA No-Cable Mode, D4ENB = HIGH l 10 500 m A I V Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load l 2.0 4.0 mA EE EE All Digital Pins = GND or V ) RS530, X.21 Modes, Full Load l 23 35 mA CC RS530-A, Full Load l 34 50 mA V.28 Mode, No Load l 13 mA V.28 Mode, Full Load l 12 18 mA No-Cable Mode, D4ENB = HIGH l 10 500 m A I V Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, NoLoad l 0.3 2 mA DD DD All Digital Pins = GND or V ) RS530, RS530-A, X.21 Modes, Full Load l 0.3 2 mA CC V.28 Mode, No Load l 13 mA V.28 Mode, Full Load l 13.5 18 mA No-Cable Mode, D4ENB = HIGH l 10 500 m A P Internal Power Dissipation (DCE Mode, RS530, RS530-A, X.21 Modes, Full Load 340 mW D (All Digital Pins = GND or V ) V.28 Mode, Full Load 64 mW CC 2 U W U W U WW