Interface RS232/RS562 Transceivers

Obsolete

LT1332 - Wide Supply RangeLow Power RS232 Transceiver with 12V VPP Output for Flash Memory

Features

  • Obsolete - Datasheet For Information Purposes Only.  Contact Linear Technology For Replacement
  • Generates Full RS232 Signal Levels from 3V Supply
  • 12V VPP Output Available for Flash Memory
  • Useful with a Wide Variety of Switching Regulators
  • Low Supply Current: I(VCC) = 1mA
  • Wide Supply Range: 2V  VCC  6V
  • ESD Protection Over ±10kV
  • Operates to 120k Baud
  • Outputs Assume a High Impedance State When Off or Powered Down
  • One μPower Receiver Remains Active While in SHUTDOWN
  • Flowthrough Architecture Eases PC Board Layout
  • 40μA Supply Current in SHUTDOWN
  • Absolutely No Latch-Up
  • Available in SO and SSOP Packages

Typical Application

LT1332 Typical Application
LT1332 Typical Application

Description

The LT1332 is a 3-driver/5-receiver RS232 transceiver, designed to be used in conjunction with a switching regulator. The LT1332 shares the regulator’s positive output, while charge is capacitively pumped from the regulator’s switch pin to the negative supply. Schottky rectifiers built into the LT1332 simplify the charge pump design.

The LT1332/LT1109A combination shown below generates fully compliant RS232 signal levels from as little as 2V of input supply. The switcher can deliver greater than 100mA of output current, making the LT1332 an excellent choice for mouse driver circuits.

Advanced driver output stages operate up to 120k baud while driving heavy capacitive loads. New ESD structures on chip make the LT1332 resilient to multiple ±10kV strikes, eliminating costly transient suppressors.

A shutdown pin disables the transceiver except for one receiver which remains active for detecting incoming RS232 signals. When shut down, the disabled drivers and receivers assume high impedance output states.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

LT1332 Package Drawing
LT1332 Package Drawing
LT1332 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Notebook and Palmtop Computers
  • Mouse Driver Circuits

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

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