Features

• On-Chip ESD Protection:
  ±15kV Human Body Model
  ±15kV IEC-1000-4-2 Air Gap Test**
  ±8kV IEC-1000-4-2 Contact Test
• 125kBd Operation with 3kohms/2500pF Load
• 250kBd Operation with 3kohms/1000pF Load
• Operates from ±5V to ±15V Supplies
• Fully Protected Against Overload
• Outputs Can Be Driven ±30V Without Damage
• Three-State Outputs; Outputs Open When Off
• Bipolar Circuit - No Latchup
• ±30V Input Range
• Triple Driver/Receiver
• No Supply Current in Shutdown
• 30kohms Input Impedance
• Meets All RS232 Specifications
• 16-Pin Version - Pin Compatible with MC145406
• Available in SO Package

Typical Application

Description

The LT®1039A is a triple RS232 driver/receiver that includes shutdown. Each receiver will accept up to ±30V input and can drive either TTL or CMOS logic. The RS232 drivers accept TTL logic inputs and output RS232 voltage levels. The outputs are fully protected against overload and can be shorted to ground or up to ±30V without damage to the drivers. Additionally, when the system is shut down or power is off, the outputs are in a high impedance state allowing data line sharing. On-chip ESD protection eliminates the need for external protection devices. A bias pin allows one receiver to be kept on while the rest of the part is shut down.

A bias pin allows one receiver to be kept on while the rest of the part is shut down.

The LT1039A is also available in the 16-pin version, without shutdown or bias pin functions.

For applications requiring operation from a single 5V supply, see the LT1180A/LT1181A and LT1130A data sheets.