LTC1343 Datasheet | Linear Technology

LTC1343 Software-Selectable Multiprotocol Transceiver Features s DESCRIPTIO s s s s s U APPLICATIO S s s s Software-Selectable Transceiver Supports: RS232, RS449, EIA-530, EIA-530-A, V.35, V.36, X.21 NET1 and NET2 pliant Software-Selectable Cable Termination Using the LTC1344 4-Driver/4-Receiver Configuration Provides a plete 2-Chip DTE or DCE Port Operates from Single 5V Supply Internal Echoed Clock and Loop-Back Logic Data Networking CSU and DSU Data Routers , LTC and LT are registered trademarks of Linear Technology Corporation. The LTC®1343 is a 4-driver/4-receiver multiprotocol transceiver that operates from a single 5V supply. Two LTC1343s form the core of a plete software-selectable DTE or DCE interface port that supports the RS232, RS449, EIA-530, EIA-530-A, V.35, V.36 or X.21 protocols. Cable termination may be implemented using the LTC1344 software-selectable cable termination chip or by using existing discrete designs. The LTC1343 runs from a single 5V supply using an internal charge pump that requires only five space saving surface mount capacitors. The mode pins are latched internally to allow sharing of the select lines between multiple interface ports. Software-selectable echoed clock and loop-back modes help eliminate the need for external glue logic between the serial controller and line transceiver. The part Features a flowthrough architecture to simplify EMI shielding and is available in the 44-lead SSOP surface mount package. TYPICAL APPLICATIO CTS DSR DCD DTE Multiprotocol Serial Interface with DB-25 Connector DTR RTS RL TM RXD RXC TXC SCTE TXD LL LTC1343 D4 R4 R3 R2 R1 D3 D2 D1 R4 R3 R2 LTC1343 D4 R1 D3 D2 D1 13 5 22 6 10 8 23 20 19 16 3 17 12 15 11 24 14 2 DB-25 CONNECTOR LTC1344 18 RL A (140) RTS B RTS A (105) SHIELD (101) SGND (102) TM A (142) RXD B RXD A (104) RXC B RXC A (115) SCTE B SCTE A (113) TXD B TXD A (103) LL A (141) TXC B TXC A (114) 1343 TA01 DSR B DSR A (107) CTS...