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LT1180AMJ Datasheet(PDF) 1 Page - Linear Integrated Systems |
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LT1180AMJ Datasheet(HTML) 1 Page - Linear Integrated Systems |
1 / 12 page 1 LT1180A/LT1181A 11801afb DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO Low Power 5V RS232 Dual Driver/Receiver with 0.1 µF Capacitors R Output Waveforms LT1180A • TA02 DRIVER OUTPUT RL = 3k CL = 2500pF RECEIVER OUTPUT CL = 50pF INPUT 5k 5k 0.1 µF LOGIC INPUTS LOGIC OUTPUTS ON/OFF 18 10 13 11 12 6 5 4 2 16 9 14 8 15 7 3 17 5V INPUT V+ OUT V – OUT RS232 OUTPUT RS232 OUTPUT RS232 INPUT RS232 INPUT LT1180A • TA01 LT1180A + 0.1 µF + 0.1 µF 0.1 µF + s ESD Protection over ±10kV s Uses Small Capacitors: 0.1 µF s 120kBaud Operation for RL = 3k, CL = 2500pF s 250kBaud Operation for RL = 3k, CL = 1000pF s Outputs Withstand ±30V Without Damage s CMOS Comparable Low Power: 40mW s Operates from a Single 5V Supply s Rugged Bipolar Design s Outputs Assume a High Impedance State When Off or Powered Down s Meets All RS232 Specifications s Available With or Without Shutdown s Absolutely No Latch-up s Available in SO Package s Portable Computers s Battery-Powered Systems s Power Supply Generator s Terminals s Modems , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb is a registered trademark of General Instruments, GSI The LT ®1180A/LT1181A are dual RS232 driver/receiver pairs with integral charge pump to generate RS232 volt- age levels from a single 5V supply. These circuits feature rugged bipolar design to provide operating fault tolerance and ESD protection unmatched by competing CMOS designs. Using only 0.1 µF external capacitors, these cir- cuits consume only 40mW of power, and can operate to 120k baud even while driving heavy capacitive loads. New ESD structures on the chip allow the LT1180A/LT1181A to survive multiple ±10kV strikes, eliminating the need for costly TransZorbs ® on the RS232 line pins. The LT1180A/ LT1181A are fully compliant 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 LT1181A is available in 16-pin DIP and SO packages. The LT1180A is supplied in 18-pin DIP and SO packages for applications which require shutdown. |
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