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10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • Industry-Standard 4-Wire Interface Simplifies I/O Ports Expansion Independent of Microprocessor Architecture
    • High-Speed, 26MHz, SPI-/QSPI™-/MICROWIRE®-Compatible Serial Interface
    • 2.25V to 3.6V Operation
  • Protection Circuitry Ensures Robust Operation
    • I/O Port Inputs Are Overvoltage Protected to 7V
    • I/O Port Outputs Are 7V-Rated Open Drain
    • I/O Ports Support Hot Insertion
  • Low Power Consumption and Small Package Reduce Board Size and Power-Supply Requirements
    • 0.7µA (typ), 1.9µA (max) Standby Current
    • 3mm x 3mm, 0.8mm High TQFN Package

Applications/Uses

  • Cellular Phones
  • Industrial Controllers
  • Portable Equipment
  • System Monitoring
  • White Goods

Description

The MAX7317 serial-interfaced peripheral provides microprocessors with 10 I/O ports rated to 7V. Each port can be individually configured as either an opendrain output, or an overvoltage-protected Schmitt input.

The MAX7317 supports hot insertion. All port pins remain high impedance in power-down (V+ = 0V) with up to 8V asserted on them.

The MAX7317 is available in 16-pin thin QFN and QSOP packages and operates in the -40°C to +125°C range.

For a similar part with constant-current outputs and 8-bit PWM controls, refer to the MAX6966/MAX6967 data sheet.

Simplified Block Diagram

MAX7317: Block Diagram MAX7317: Block Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .