Octal Serial Switch with SPI

MC33880

The NXP® MC33880 is an 8-output hardware configurable high side/low side switch with 8-bit serial input control using the serial peripheral interface (SPI).

  • Two of the outputs can be controlled directly via MCU for pulse-width modulation (PWM) applications
  • Controls various inductive or incandescent loads by directly interfacing with a MCU
  • Innovative monitoring and protection features include very low standby currents, “cascadable” fault reporting, internal 40 V output clamping for low side configurations, internal -20 V output clamping for high side configurations, output specific diagnostics, and independent shutdown of outputs.

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Product Details

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Block Diagram

MC33880_BD

NXP<sup>&#174;</sup> MC33880 Internal Block Diagram
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Features

  • Designed to operate 5.5 V ≤ VPWR ≤ 24.5 V
  • 8-bit SPI for control and fault reporting, 3.3/ 5.0 V compatible
  • Outputs are current limited (0.8 A to 2.0 A) to drive incandescent lamps
  • Output voltage clamp is +45 V (typical) (low side drive) and -20 V (typical) (high side drive) during inductive switching
  • Internal reverse battery protection on VPWR
  • Loss of ground or supply will not energize loads or damage IC
  • Maximum 5.0 µA IPWR standby current at 13 V VPWR up to 95 °C
  • RDS(ON) of 0.55 Ohm at 25 °C typical
  • Short circuit detect and current limit with autoretry
  • Independent over-temperature protection
  • 32-pin SOICW has pins 8, 9, 24, and 25 grounded for thermal performance

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