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TIC12400-Q1

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

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Data sheet
Automotive 35-V multi-switch detection interface (MSDI) with SPI & integrated ADC

TIC12400-Q1

ACTIVE
Data sheet Order now

Product details

Number of input channels 24 Operating voltage (Min) (V) 4.5 Operating voltage (Max) (V) 35 I/O voltage (Min) (V) -24 I/O voltage (Max) (V) 40 IO current (mA) 1, 2, 5, 10, 15 Operating temperature range (C) -40 to 125 Interface type SPI Features Integrated 10-bit ADC, Polling mode, Configurable wetting current, Overvoltage warning, Undervoltage warning, SPI, Interrupt wake-up operation, Withstands load dump condition and reverse polarity condition Diagnostics Wetting Current Diagnostic, ADC Self-Diagnostic Logic voltage (Min) (V) 3 Logic voltage (Max) (V) 5.5
Number of input channels 24 Operating voltage (Min) (V) 4.5 Operating voltage (Max) (V) 35 I/O voltage (Min) (V) -24 I/O voltage (Max) (V) 40 IO current (mA) 1, 2, 5, 10, 15 Operating temperature range (C) -40 to 125 Interface type SPI Features Integrated 10-bit ADC, Polling mode, Configurable wetting current, Overvoltage warning, Undervoltage warning, SPI, Interrupt wake-up operation, Withstands load dump condition and reverse polarity condition Diagnostics Wetting Current Diagnostic, ADC Self-Diagnostic Logic voltage (Min) (V) 3 Logic voltage (Max) (V) 5.5
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HTSSOP (DCP) 38 43 mm² 9.7 x 4.4
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  • 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
  • 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 10-bit ADC for Multi-Position Analog Switch Monitoring
  • 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
  • Integrated Battery and Temperature Sensing
  • ±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
  • 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 10-bit ADC for Multi-Position Analog Switch Monitoring
  • 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
  • Integrated Battery and Temperature Sensing
  • ±8 kV Contact Discharge ESD Protection on Input Pins per ISO-10605 With Appropriate External Components
  • 38-Pin TSSOP Package
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The TIC12400-Q1 is an advanced Multiple Switch Detection Interface (MSDI) designed to detect external switch status in a 12-V automotive system. The TIC12400-Q1 features an integrated 10-bit ADC to monitor multi-position analog switches and a comparator to monitor digital switches independently of the MCU. Detection thresholds can be programmed for the ADC and the comparator to support various switch topologies and system non-idealities. The device monitors 24 direct switch inputs, with 10 inputs configurable to monitor switches connected to either ground or battery. 6 unique wetting current settings 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 TIC12400-Q1 also offers integrated fault detection, ESD protection, and diagnostic functions for improved system robustness. The TIC12400-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 TIC12400-Q1 is an advanced Multiple Switch Detection Interface (MSDI) designed to detect external switch status in a 12-V automotive system. The TIC12400-Q1 features an integrated 10-bit ADC to monitor multi-position analog switches and a comparator to monitor digital switches independently of the MCU. Detection thresholds can be programmed for the ADC and the comparator to support various switch topologies and system non-idealities. The device monitors 24 direct switch inputs, with 10 inputs configurable to monitor switches connected to either ground or battery. 6 unique wetting current settings 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 TIC12400-Q1 also offers integrated fault detection, ESD protection, and diagnostic functions for improved system robustness. The TIC12400-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 TIC12400-Q1 24-Input Multiple Switch Detection Interface (MSDI) With Integrated ADC and Adjustable Wetting Current for Automotive Systems datasheet (Rev. B) 28 Jan 2020
Technical article Body control module resources to make your design more efficient and reliable 30 Oct 2020
Application note Protecting 12-V MSDI Devices in a 24-V System 22 Sep 2020
Application note Switch Detection in BCM: Integrated MSDI Solution vs. Semi Discrete Solution 11 Aug 2020
Application note Steps to Configure TIC12400-Q1 Multiple Switch Detection Interface (MSDI) 07 Apr 2019
Application note Input Sharing with the TIC12400-Q1 23 Feb 2018
Test report TIC12400-Q1 and TIC10024-Q1 ISO-10605 ESD Test Report 27 Nov 2017
Technical article How to reduce the number of I/O pins with a switch matrix module 02 Nov 2017
Technical article Body control modules – invisible but fundamental for every car 19 Oct 2017
Technical article The multi-switch detection interface: integrated features for smaller, more efficient designs 10 Oct 2017
User guide TIC12400 EVM User's Guide 03 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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Simulation model

TIC12400-Q1 IBIS Model

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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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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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HTSSOP (DCP) 38 View options

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