LTC1546 Datasheet | Linear Technology

Software-Selectable Multiprotocol Transceiver with Termination Features s Software-Selectable Transceiver Supports: RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21 s TUV Tele Services Inc. Certified NET1, NET2 and TBR2 pliant s On-Chip Cable Termination s Pin patible with LTC1543 s plete DTE or DCE Port with LTC1544 s Operates from Single 5V Supply s Small Footprint U APPLICATIO S s Data Networking s CSU and DSU s Data Routers DESCRIPTIO The LTC®1546 is a 3-driver/3-receiver multiprotocol transceiver with on-chip cable termination. When bined with the LTC1544, this chip set forms a plete softwareselectable DTE or DCE interface port that supports the RS232, RS449, EIA530, EIA530-A, V.35, V.36 and X.21 protocols. All necessary cable termination is provided inside the LTC1546. In most applications, the LTC1546 replaces both an LTC1543 and an LTC1344A without any changes to the PC board. The LTC1546 runs from a single 5V supply using an internal charge pump that requires only five space-saving surface mounted capacitors. The LTC1546 is available in a 28-lead SSOP surface mount package. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION plete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector LL CTS DSR DCD DTR RTS RXD RXC TXC SCTE TXD LTC1544 D4 R4 R3 R2 R1 D3 D2 D1 D3 D2 D1 R3 R2 R1 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) 18 13 5 22 6 10 8 23 20 19 4 1 7 16 3 9 17 12 15 11 24 14 2 DB-25 CONNECTOR 1546 TA01 U WW W ABSOLUTE AXI U RATI GS (Note 1) Supply Voltage ....................................................... 6.5V Input Voltage Transmitters ........................... - 0.3V to (VCC + 0.3V) Receivers ..................................................