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