MSDI with 32 mA Suppressed Wakeup

MC33975

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The NXP® MC33975 multiple switch detection interface with suppressed wake-up is designed to detect the closing and opening of up to 22 switch contacts, ideal for automotive and industrial products requiring low sleep state currents.

  • The switch status, open or closed, is transferred to the MPU through a serial peripheral interface
  • Normal mode allows programming of the device and supplies switch contacts with pullup or pull-down current and Sleep mode provides low quiescent current
  • The programmable interrupt timer for Sleep mode can be disabled, switch detection currents are 32 mA and 4.0 mA for switch-to-ground inputs, the interrupt bit is a reset bit, and the package is Pb-free

Product Details

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Block Diagram

NXP MC33975 Power Actuation Block Diagram

NXP MC33975 Power Actuation Block Diagram
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Features

  • Designed to Operate 5.5 V ≤ VPWR ≤ 28 V
  • Switch Input Voltage Range -14 V to VPWR, 40 V Max
  • Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol
  • Selectable Wake-Up on Change of State
  • Selectable Wetting Current (32 mA or 4.0 mA for switch-to-ground inputs)
  • 8 Programmable Inputs (Switches to Battery or Ground)
  • 14 Switch-to-Ground Inputs
  • VPWR Standby Current 100 µA Typical, VDD Standby Current 20 µA Typical
  • Pb-Free Packaging Designated by Suffix Code EK
  • This product is included in NXP® product longevity program, with assured supply for a minimum of 15 years after launch

Key Parametrics

  • Device Function
    powertraincontrol, signalconditioning, switchmonitoring
  • Package Termination Count
    32
  • Package Type
    SSOP32
  • Load Supply Voltage (Min) (V)
    5.5
  • Load Supply Voltage (Max) (V)
    26
  • Interface and Input Control
    SPI
  • Ambient Operating Temperature (Min to Max) (℃)
    -40 to 125

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