LT1331 - 3V RS562 or 5V/3V RS232 Transceiver with One Receiver Active in Shutdown

The LT®1331 is a 3-driver, 5-receiver RS232 transceiver designed for 3V and mixed 3V/5V systems. Receivers operate from 3V logic supply VL, while the onboard charge pump and drivers operate from 5V or 3V supply VCC. The transceiver has two shutdown modes. One mode disables the drivers and the charge pump, the other shuts down all circuitry except for one low power receiver which can be used for ring detection. The VCC supply may be shut down while in ring detection mode. While shut down, the drivers and receivers assume high impedance output states. The LT1331 is fully compliant with all EIA-RS232 specifications when VCC = 5V. If VCC = 3V, output drive levels are compatible with all known interface circuits. Special bipolar construction techniques protect the drivers and receivers beyond the fault conditions stipulated for RS232. The RS232 I/O pins are resilient to multiple ±10kV ESD strikes. An advanced driver output stage operates up to 120kbaud while driving heavy capacitive loads.

  • RS232 Compatible 3V Operation
  • 3V Logic Interface
  • ESD Protection Over ±10kV
  • 120kbaud Operation for RL = 3k, CL = 2500pF
  • 250kbaud Operation for RL = 3k, CL = 1000pF
  • One Low Power Receiver Remains Active While in Shutdown
  • 60µA Supply Current in Shutdown
  • Low Power Driver Disable Mode
  • Uses Small Capacitors: 0.1µF, 0.2µF
  • CMOS Comparable Low Power: 60mW
  • Easy PC Layout: Flowthrough Architecture
  • Rugged Bipolar Design
  • Outputs Assume a High Impedance State When Off or Powered Down
LT1331 Typical Application
LT1331 Typical Application
  • Notebook Computers
  • Palmtop Computers
LT1331 Package Drawing
Order Information 订购型号
器件型号封装温度价格 (以 1 ~ 99 片为批量)价格 (以 1000 片为批量) *
CAD 符号
LT1331 - 3V RS562 or 5V/3V RS232 Transceiver with One Receiver Active in Shutdown
DN71 - Regulator Circuit Generates Both 3.3V and 5V Outputs from 3.3V or 5V to Run Computers and RS232
DN75 - RS232 Interface Circuits for 3.3V Systems
DN80 - ESD Testing for RS232 Interface Circuits
R068 Reliability Data
LTM2882 - Isolated RS232 + 1W Power
RS232 Quick Guide
LT1331 Footprints and Symbols