RS232/EIA562/RS485 Transceivers Features: LTC1321: 2-EIA562/RS232 Transceivers/2-RS485 Transceivers LTC1322: 4-EIA562/RS232 Transceivers/2-RS485 Transceivers LTC1335: 4-EIA562 Transceivers/2-RS485 Transceivers with OE LTC1321/LTC1322 Have the Same Pinout as SP301/SP302 LTC1335 Features Receiver Three-State Outputs Low Supply Current: 1mA Typical 15µA Supply Current in Shutdown 120kBaud in EIA/TIA-562 or RS232 Mode 10MBaud in RS485/RS422 Mode Self-Testing Capability in Loopback Mode Power-Up/Down Glitch-Free Outputs Driver Maintains High Impedance in Three-State, Shutdown or With Power Off Thermal Shutdown Protection I/O Lines Can Withstand ±25V Withstands Repeated 10kV ESD Pulses

5V Low Power RS232 3-Driver/5-Receiver Transceiver Features: Low Supply Current: 300µA ESD Protection: Over ±10kV 1µA Supply Current in Shutdown Operates from a Single 5V Supply Uses Small Capacitors: 0.1µF Operates to 120k Baud Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V without Damage Pin Compatible with LT®1137A and LT1237 Flowthrough Architecture

5V Low Power RS232 5-Driver/3-Receiver Transceiver Features: Low Supply Current: 500µA 0.2µA Supply Current in SHUTDOWN 50µA Supply Current in RECEIVER ALIVE Mode ESD Protection Over ±10kV Operates from a Single 5V Supply Uses Small Capacitors: 0.1µF Operates to 120k Baud Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture

5V Low Power RS232 5-Driver/3-Receiver Transceiver Features: Low Supply Current: 500µA 0.2µA Supply Current in SHUTDOWN 50µA Supply Current in RECEIVER ALIVE Mode ESD Protection Over ±10kV Operates from a Single 5V Supply Uses Small Capacitors: 0.1µF Operates to 120k Baud Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture

Software-Selectable Multiprotocol Transceiver Features: Software-Selectable Transceiver Supports: RS232, RS449, EIA-530, EIA-530-A, V.35, V.36, X.21 NET1 and NET2 Compliant Software-Selectable Cable Termination Using the LTC1344 4-Driver/4-Receiver Configuration Provides a Complete 2-Chip DTE or DCE Port Operates from Single 5V Supply Internal Echoed Clock and Loop-Back Logic

Software-Selectable Cable Terminator Features: Software-Selectable Cable Termination for: RS232 (V.28) RS423 (V.10) RS422 (V.11) RS485 RS449 EIA530 EIA530-A V.35 V.36 X.21 Outputs Won’t Load the Line with Power Off

3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver Features: Low Supply Current: 600µA at 3.3V Supply Current in Shutdown: 0.2µA Supply Current in Receiver Alive Mode: 15µA ESD Protection over ±10kV Operates from a Single 3V to 5.5V Supply Operates to 120kBaud with 0.1µF Flying Capacitors Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture

3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver Features: Low Supply Current: 600µA at 3.3V Supply Current in Shutdown: 0.2µA Supply Current in Receiver Alive Mode: 15µA ESD Protection over ±10kV Operates from a Single 3V to 5.5V Supply Operates to 120kBaud with 0.1µF Flying Capacitors Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture

3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver Features: Low Supply Current: 600µA at 3.3V Supply Current in Shutdown: 0.2µA Supply Current in Receiver Alive Mode: 15µA ESD Protection over ±10kV Operates from a Single 3V to 5.5V Supply Operates to 120kBaud with 0.1µF Flying Capacitors Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture

5V Low Power RS232 3-Driver/5-Receiver Transceiver with 2 Receivers Active in Shutdown Features: Low Supply Current: 300µA Two Receivers Kept Alive in Shutdown ESD Protection Over ±10kV Operates from a Single 5V Supply Uses Small Capacitors: 0.1µF Operates to 120kBaud Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to ±25V Without Damage Pin Compatible with LT1137A and LT1237 Flowthrough Architecture