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MAX7317
10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 296kB)
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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.

Key Features   Applications/Uses
  • High-Speed, 26MHz SPI™-/QSPI-™/MICROWIRE™- Compatible Serial Interface
  • 2.25V to 3.6V 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
  • 0.7µA (typ), 1.9µA (max) Standby Current
  • Tiny 3mm x 3mm, 0.8mm High Thin QFN Package
  • -40°C to +125°C Temperature Range

     
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    Key Specifications:  I/O Port Expanders
    Part Number Interface I/O Over Voltage Protect. Drive Current
    (mA)
    VSUPPLY
    (V)
    VSUPPLY
    (V)
    Price
    min max See Notes
    MAX7317  Serial SPI 26Mbit 10 7V 10 2.25 3.6 $1.09 @1k
    See All I/O Port Expanders (26)

    Diagram
    MAX7317: Typical Application Circuit
    Typical Application Circuit

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    Document Ref.: 19-3380; Rev 2; 2005-04-26
    This page last modified: 2005-07-06


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