LT1332 Datasheet | Linear Technology

OBSOLETE: FOR INFORMATION PURPOSES ONLY Contact Linear Technology for Potential Replacement Features Wide Supply Range Low Power RS232 Transceiver with 12V VPP Output for Flash Memory DESCRIPTION n Generates Full RS232 Signal Levels from 3V Supply n 12V VPP Output Available for Flash Memory n Useful with a Wide Variety of Switching Regulators n Low Supply Current: I(VCC) = 1m A n Wide Supply Range: 2V ≤ VCC ≤ 6V n ESD Protection Over ±10k V n Operates to 120k Baud n Outputs Assume a High Impedance State When Off or Powered Down n One µPower Receiver Remains Active While in SHUTDOWN n Flowthrough Architecture Eases PC Board Layout n 40µA Supply Current in SHUTDOWN n Absolutely No Latch-Up n Available in SO and SSOP Packages APPLICATIONS n Notebook and Palmtop puters n Mouse Driver Circuits 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 bination shown below generates fully pliant RS232 signal levels from as little as 2V of input supply. The switcher can deliver greater than 100m A 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 ±10k V strikes, eliminating costly transient suppressors. A shutdown pin disables the transceiver except for one receiver which remains active for detecting ining RS232 signals. When shut down, the disabled drivers and receivers assume high impedance output states. TYPICAL APPLICATION LT1332 Powered from an LT1109A Micropower Switching Regulator Configured for Flash Memory STANDARD FLASH MEMORY VPP...