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Multi-switch detection interface (MSDI) ICs

TIC10024-Q1

ACTIVE

Automotive 35-V multi-switch detection interface (MSDI) with SPI

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Data sheet

TIC10024-Q1

ACTIVE
Data sheet Order now

Product details

Number of input channels 24 Operating voltage (min) (V) 4.5 Operating voltage (max) (V) 35 Input/output voltage (max) (V) 40 Input/output voltage (min) (V) -24 IO current (mA) 1, 2, 5, 10, 15 Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Interface type SPI Features Configurable wetting current, Interrupt wake-up operation, Overvoltage warning, Polling mode, SPI, Undervoltage warning, Withstands load dump condition and reverse polarity condition Logic voltage (min) (V) 3 Logic voltage (max) (V) 5.5 Rating Automotive
Number of input channels 24 Operating voltage (min) (V) 4.5 Operating voltage (max) (V) 35 Input/output voltage (max) (V) 40 Input/output voltage (min) (V) -24 IO current (mA) 1, 2, 5, 10, 15 Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Interface type SPI Features Configurable wetting current, Interrupt wake-up operation, Overvoltage warning, Polling mode, SPI, Undervoltage warning, Withstands load dump condition and reverse polarity condition Logic voltage (min) (V) 3 Logic voltage (max) (V) 5.5 Rating Automotive
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4
  • Qualified for automotive applications
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C4B
  • Functional Safety-Capable
  • Designed to support 12-V automotive systems with over-voltage and under-voltage warning
  • Monitors up to 24 direct switch inputs with 10 inputs configurable to monitor switches connected to either ground or battery
  • Switch input withstands up to 40 V (load dump condition) and down to –24 V (reverse polarity condition)
  • 6 Configurable wetting current settings: (0 mA, 1 mA, 2 mA, 5 mA, 10 mA, and 15 mA)
  • Integrated comparator with 4 programmable thresholds for digital switch monitoring
  • Ultra-low operating current in polling mode: 68 µA typical (tPOLL = 64 ms, tPOLL_ACT = 128 µs, all 24 inputs active, comparator mode, all switches open)
  • Interfaces directly to MCU using 3.3 V / 5 V serial peripheral interface (SPI) protocol
  • Interrupt generation to support wake-up operation on all inputs
  • ±8 kV Contact discharge ESD protection on input pins per ISO-10605 with appropriate external components
  • 38-Pin TSSOP package
  • Qualified for automotive applications
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C4B
  • Functional Safety-Capable
  • Designed to support 12-V automotive systems with over-voltage and under-voltage warning
  • Monitors up to 24 direct switch inputs with 10 inputs configurable to monitor switches connected to either ground or battery
  • Switch input withstands up to 40 V (load dump condition) and down to –24 V (reverse polarity condition)
  • 6 Configurable wetting current settings: (0 mA, 1 mA, 2 mA, 5 mA, 10 mA, and 15 mA)
  • Integrated comparator with 4 programmable thresholds for digital switch monitoring
  • Ultra-low operating current in polling mode: 68 µA typical (tPOLL = 64 ms, tPOLL_ACT = 128 µs, all 24 inputs active, comparator mode, all switches open)
  • Interfaces directly to MCU using 3.3 V / 5 V serial peripheral interface (SPI) protocol
  • Interrupt generation to support wake-up operation on all inputs
  • ±8 kV Contact discharge ESD protection on input pins per ISO-10605 with appropriate external components
  • 38-Pin TSSOP package

The TIC10024-Q1 is an advanced Multiple Switch Detection Interface (MSDI) device designed to detect external switch status in a 12-V automotive system. The TIC10024-Q1 features a comparator with adjustable thresholds to monitor digital switches independently of the MCU. The device monitors 24 direct switch inputs, with 10 inputs configurable to monitor switches connected to either ground or battery. There are 6 unique wetting current settings that can be programmed for each input to support different application scenarios. The device supports wake-up operation on all switch inputs to eliminate the need to keep the MCU active continuously, thus reducing power consumption of the system. The TIC10024-Q1 also offers integrated fault detection and ESD protection for improved system robustness. The TIC10024-Q1 supports 2 modes of operations: continuous and polling mode. In continuous mode, wetting current is supplied continuously. In polling mode, wetting current is turned on periodically to sample the input status based on a programmable timer, thus the system power consumption is significantly reduced.

The TIC10024-Q1 is an advanced Multiple Switch Detection Interface (MSDI) device designed to detect external switch status in a 12-V automotive system. The TIC10024-Q1 features a comparator with adjustable thresholds to monitor digital switches independently of the MCU. The device monitors 24 direct switch inputs, with 10 inputs configurable to monitor switches connected to either ground or battery. There are 6 unique wetting current settings that can be programmed for each input to support different application scenarios. The device supports wake-up operation on all switch inputs to eliminate the need to keep the MCU active continuously, thus reducing power consumption of the system. The TIC10024-Q1 also offers integrated fault detection and ESD protection for improved system robustness. The TIC10024-Q1 supports 2 modes of operations: continuous and polling mode. In continuous mode, wetting current is supplied continuously. In polling mode, wetting current is turned on periodically to sample the input status based on a programmable timer, thus the system power consumption is significantly reduced.
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Technical documentation

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Type Title Date
* Data sheet TIC10024-Q1 24-Input Multiple Switch Detection Interface (MSDI) Device With Adjustable Wetting Current for Automotive Systems datasheet (Rev. A) PDF | HTML 09 Feb 2022
Functional safety information TIC12400-Q1, TIC10024-Q1 Functional Safety, FIT Rate, Failure Mode Distribution PDF | HTML 12 Aug 2021
Technical article Body control module resources to make your design more efficient and reliable PDF | HTML 30 Oct 2020
Application note Steps to Configure TIC12400-Q1 Multiple Switch Detection Interface (MSDI) 07 Apr 2019
Test report TIC12400-Q1 and TIC10024-Q1 ISO-10605 ESD Test Report 27 Nov 2017
Technical article Body control modules – invisible but fundamental for every car PDF | HTML 19 Oct 2017

Design & development

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Evaluation board

TIC12400EVM-KIT — Evaluation module kit for the TIC12400-Q1 24-input multiple-switch-detection interface

The TIC12400EVM-KIT is a flexible two-board evaluation platform that lets you evaluate the expansive feature sets of the TIC12400-Q1 device. The TIC12400-Q1 device is a 24-channel switch and contact monitoring solution that incorporates a power-saving polling architecture, configurable (...)
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TIC10024 IBIS Model

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Reference designs

TIDA-01237 — Automotive Multi-Switch Detection Interface (MSDI) Reference Design

This reference design shows example implementations of how to handle a variety of high-voltage (HV) switch inputs using a multi-switch detection interface (MSDI) device. This user's guide gives real-world examples of a MSDI device handling HV switch inputs for body control module (BCM), faceplate, (...)
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