LT1281A Datasheet | Linear Technology

LT1280A/LT1281A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors DESCRIPTIO The LT ®1280A/LT1281A are dual RS232 driver/receiver pairs with integral charge pump to generate RS232 voltage levels from a single 5V supply. These circuits feature rugged bipolar design to provide operating fault tolerance and ESD protection unmatched by peting CMOS designs. Using only 0.1µF external capacitors, these circuits consume only 40m W of power, and can operate to 120kbaud even while driving heavy capacitive loads. New ESD structures on the chip allow the LT1280A/LT1281A to survive multiple ±10k V strikes, eliminating the need for costly Trans Zorbs® on the RS232 line pins. The LT1280A/ LT1281A are fully pliant with EIA RS232 standards. Driver outputs are protected from overload, and can be shorted to ground or up to ± 30V without damage. During shutdown or power-off conditions, driver and receiver outputs are in a high impedance state, allowing line sharing. The LT1281A is available in 16-pin DIP and SO packages. The LT1280A is supplied in 18-pin DIP and SO packages for applications which require shutdown. , LTC and LT are registered trademarks of Linear Technology Corporation. Trans Zorb is a registered trademark of General Instruments, GSI Features s s s s s s s s s s s s s s 10m A Max Supply Current ESD Protection over ± 10k V Uses Small Capacitors: 0.1µF 120k Baud Operation for RL = 3k, CL = 2500p F 250k Baud Operation for RL = 3k, CL = 1000p F Outputs Withstand ± 30V Without Damage CMOS parable Low Power: 40m W Operates from a Single 5V Supply Rugged Bipolar Design Outputs Assume a High Impedance State When Off or Powered Down Meets All RS232 Specifications Available With or Without Shutdown Absolutely No Latch-up Available in SO Package APPLICATI s s s s s Portable puters Battery-Powered Systems Power Supply Generator Terminals Modems TYPICAL APPLICATI 0.1µF + 2 4 LT1280A 17 3 5V INPUT + + 5 6 12 LOGIC INPUTS 15 7 V+ 0.1µF DRIVER OUTPUT...