LT1381 Datasheet | Linear Technology

LT1381 Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors Features s s s s s s s s s DESCRIPTIO s s ESD Protection over ± 10kV Low Cost Uses Small Capacitors: 0.1µF CMOS parable Low Power: 40mW Operates from a Single 5V Supply 120kBaud Operation for RL = 3k, CL = 2500pF 250kBaud Operation for RL = 3k, CL = 1000pF Rugged Bipolar Design Outputs Assume a High Impedance State When Powered Down Absolutely No Latchup Available in Narrow SO Package APPLICATI s s s s s S The LT ®1381 is a dual RS232 driver/receiver pair with integral charge pump to generate RS232 voltage levels from a single 5V supply. The circuit Features rugged bipolar design to provide operating fault tolerance and ESD protection unmatched by peting CMOS designs. Using only 0.1µF external capacitors, the circuit consumes only 40mW of power and can operate to 120kbaud even while driving heavy capacitive loads. New ESD structures on the chip allow the LT1381 to survive multiple ±10kV strikes, eliminating the need for costly TransZorbs® on the RS232 line pins. Driver outputs are protected from overload and can be shorted to ground or up to ± 25V without damage. During power-off conditions, driver and receiver outputs are in a high impedance state, allowing line sharing. , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb® is a registered trademark of General Instruments, GSI Portable puters Battery-Powered Systems Power Supply Generator Terminals Modems TYPICAL APPLICATI 0.1µF + 1 3 LT1381 16 2 5V INPUT + + 4 5 11 LOGIC INPUTS 14 6 V + OUT 0.1µF V - OUT DRIVER OUTPUT RL = 3k CL = 2500pF 0.1µF + 0.1µF RS232 OUTPUT RECEIVER R OUTPUT CL = 50pF 10 12 7 13 5k RS232 OUTPUT RS232 INPUT INPUT LOGIC OUTPUTS 9 S 8 5k 15 RS232 INPUT -...