General Description

The MAX1608/MAX1609 provide remote input/output (I/O) expansion through an SMBus™ 2-wire serial interface.

Each device has eight high-voltage open-drain outputs that double as TTL-level logic inputs, providing continuous bidirectional capabilities. The open-drain outputs tailor the MAX1608/MAX1609 for use in load-switching and other level-shifting applications as well as general-purpose I/O applications.

Features

♦Serial-to-Parallel or Parallel-to-Serial Conversions

♦8 General-Purpose Digital I/O Pins (withstand +28V)

♦SMBus 2-Wire Serial Interface

♦Supports SMBSUSAsynchronous Suspend

♦9 Pin-Selectable Slave Addresses

♦Outputs High Impedance on Power-Up (MAX1609)

♦Outputs Low on Power-Up (MAX1608)

♦2.5µA Supply Current

♦+2.7V to +5.5V Supply Range

♦16-Pin QSOP Package

Applications

Parallel I/O Expansion

Power-Plane Switching

Notebook and Desktop Computers

Servers and Workstations

Notebook Docking Stations

Industrial Equipment