LT1280A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors

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 competing CMOS designs. Using only 0.1µF external capacitors, these circuits consume only 40mW 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 ±10kV strikes, eliminating the need for costly TransZorbs® on the RS232 line pins. The LT1280A/LT1281A 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 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

产品特点 Features
  • 10mA Max Supply Current
  • ESD Protection over ±10kV
  • Uses Small Capacitors: 0.1µF
  • 120kBaud Operation for RL = 3k, CL = 2500pF
  • 250kBaud Operation for RL = 3k, CL = 1000pF
  • Outputs Withstand ±30V Without Damage
  • CMOS Comparable Low Power: 40mW
  • 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
应用
  • Portable Computers
  • Battery-Powered Systems
  • Power Supply Generator
  • Terminals
  • Modems
典型应用图
LT1280A 典型应用
参数
LT1280A 参数
LT1280A 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LT1280ACN PDIP 18 C $3.33 $2.65
LT1280ACN#PBF PDIP 18 C $3.33 $2.65
LT1280ACSW SO 18 C $3.67 $2.85
LT1280ACSW#PBF SO 18 C $3.67 $2.85
LT1280ACSW#TR SO 18 C $2.95
LT1280ACSW#TRPBF SO 18 C $2.95
LT1280AIN PDIP 18 I $4.90 $4.00
LT1280AIN#PBF PDIP 18 I $4.90 $4.00
LT1280AISW SO 18 I $5.15 $4.25
LT1280AISW#PBF SO 18 I $5.15 $4.25
LT1280AISW#TR SO 18 I $4.35
LT1280AISW#TRPBF SO 18 I $4.35
LT1280A 数据手册及相关资料下载
  1. 数据手册 (英文) : LT1280A - Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors.PDF
  2. 设计要点 (英文) : DN14 - Extending the Applications of 5V Powered RS232 Transceivers.PDF
  3. 设计要点 (英文) : DN27 - Design Considerations for RS-232 Interfaces.PDF
  4. 设计要点 (英文) : DN29 - A Single Supply RS232 Interface for Bipolar A to D Converters.PDF
  5. 设计要点 (英文) : DN64 - RS232 Transceivers for Hand Held Computers Withstand 10kV ESD.PDF
  6. 设计要点 (英文) : DN80 - ESD Testing for RS232 Interface Circuits.PDF
  7. 可靠性数据 : R001 Reliability Data .PDF
  8. 产品选型卡 : LTM2882 - Isolated RS232 + 1W Power.PDF
  9. 产品选型卡 : RS232 Quick Guide.PDF