KIT33975AEVB Evaluation Board User Guide
User guide for the KIT33975AEVB evaluation board featuring the MC33975A Multiple Switch Detection Interface IC for monitoring up to 22 switch contacts.
Overview
This document provides technical specifications and operational instructions for the KIT33975AEVB evaluation board, which features the MC33975A Multiple Switch Detection Interface IC. The kit is designed to monitor up to 22 switch contacts, including 14 switch-to-ground and 8 programmable switch-to-battery or ground inputs. Key device features include a 22-to-1 analog multiplexer, selectable wetting currents (32 mA or 4.0 mA), and SPI communication compatibility for 3.3V and 5.0V logic. The user guide includes comprehensive hardware setup details, circuit schematics, board layout diagrams, and a complete Bill of Materials (BOM) for the evaluation system.
Use Cases
- Automotive body electronics switch monitoring
- Industrial control system switch interfaces
- Multiplexed analog sensor data acquisition
- Power management sleep state monitoring
Topics
Referenced Parts
MC33975A
NXP
Featuring the MC33975A Multiple Switch Detection Interface IC
AK500/2
PTR
1 X1 AK500/2 2-Terminal Power Connector
MC68HC908JW32
NXP
This small board makes use of the USB and SPI ports built into Freescale’s MC68HC908JW32 microcontroller.
MURS120T3G
Diodes
Integrated Circuits | 1 MC33975ATEK Multiple Switch Detection Interface SO-32WB | Diodes | 1 D1 1.0 amp Schottky Diode MURS120T3G SMB | LEDs
SO-32WB
Diodes
Label Value Description Package | Integrated Circuits | 1 MC33975ATEK Multiple Switch Detection Interface SO-32WB | Diodes | 1 D1 1.0 amp Schottky Diode MURS120T3G SMB
| MC33975ATEK | NXP | 1 MC33975ATEK Multiple Switch Detection Interface SO-32WB |
| MURS120T3G | Onsemi | 1 D1 1.0 amp Schottky Diode MURS120T3G SMB |
| MC33975A | NXP | Featuring the MC33975A Multiple Switch Detection Interface IC |
| AK500/2 | PTR | 1 X1 AK500/2 2-Terminal Power Connector |
| MC68HC908JW32 | NXP | This small board makes use of the USB and SPI ports built into Freescale’s MC68HC908JW32 microcontroller. |
| MURS120T3G | Diodes | Integrated Circuits | 1 MC33975ATEK Multiple Switch Detection Interface SO-32WB | Diodes | 1 D1 1.0 amp Schottky Diode MURS120T3G SMB | LEDs |
| SO-32WB | Diodes | Label Value Description Package | Integrated Circuits | 1 MC33975ATEK Multiple Switch Detection Interface SO-32WB | Diodes | 1 D1 1.0 amp Schottky Diode MURS120T3G SMB |