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

NXP MC33975 Power Actuation Block Diagram
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Features

Key Features

  • Designed to operate 5.5 V ≤ VPWR ≤ 26 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
  • Power train control, signal conditioning and switch monitoring device functions
  • 32 package termination count
  • Package type SSOP32
  • Ambient operating temperature -40 to 125 °C

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The MC33975 is included in the 15-year program

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