General Description

The MAX4506/MAX4507 multiple, two-terminal signal-line protectors are pin-compatible with the industry-standard MAX366/MAX367. These new circuit protectors feature fault-protected inputs and Rail-to-Rail® signal handling capability. The input pins are protected from overvoltage faults up to ±36V with power on or ±40V with power off. During a fault condition, the input terminal becomes an open circuit and only nanoamperes of leakage current flow from the source; but the switch output (OUT_) furnishes typically 19mA from the appropriate polarity supply to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends.

Features

♦ Overvoltage Protection

   ±40V with Power Off

   ±36V with Power On

♦ Open Signal Paths with Power Off

♦ Output Clamps to Either Rail with an Input Overvoltage

♦ Any On Channel Output is Not Affected by an Overvoltage to Any Other Channel

♦ 100Ω max On-Resistance

♦ 10ns Overvoltage Turn-On Delay

♦ No Latchup During Power Sequencing

♦ Rail-to-Rail Signal Handling

♦ 500Ω Output Clamp Resistance During Overvoltage

Applications

  Process-Control Systems

  Hot-Insertion Boards/Systems

  Data-Acquisition Systems

  Redundant/Backup Systems

  ATE Equipment

  Sensitive Instruments