22 I/O MSDI Programmable Current Analog Mux

Roll over image to zoom in

Product Details

Select a section:

Block Diagram

MC33978: 22 I/O Switch Detection Interface, Programmable Wetting Current, Analog Mux


Key Features

  • Designed to operate 4.5 V ≤ VBATP ≤ 36 V
  • Switch input voltage range -14 V to VPWR, 36 V Max.
  • Interfaces directly to an MCU using 3.3 V / 5.0 V SPI protocol
  • Selectable wake-up on change of state
  • Selectable wetting current (2, 6, 8, 10, 12, 14, 16, or 20 mA)
  • 8 programmable inputs (switches to battery or ground) and 14 switch-to-ground inputs
  • Typical standby current - VBATP = 30 uA and VDD = 10 uA
  • Integrated battery and temperature sensing
  • Switch monitoring device function
  • 32 and 48 package termination count
  • HLQFP48, HSOP32 and HVQFN32 package type
  • 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 The MC33978 is included in the 15-year program

Part numbers include: MC33978AAE, MC33978AEK, MC33978AES, MC33978EK.


Quick reference to our documentation types.

1-5 of 8 documents

Show All

Design Resources

Select a section:


2 hardware offerings

Engineering Services

2 engineering services

To find a complete list of our partners that support this product, please see our Partner Marketplace.


What do you need help with?