TIC12400-Q1 Automotive 24-input multiple-switch detection with SPI | TI.com

TIC12400-Q1 (ACTIVE) Automotive 24-input multiple-switch detection with SPI

 

Description

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.

Features

  • 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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Parametrics

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Part number Order Number of inputs Operating voltage (Min) (V) Operating voltage (Max) (V) I/O voltage (Min) (V) I/O voltage (Max) (V) IO current (mA) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Interface Features Diagnostics Logic voltage (Min) (V) Logic voltage (Max) (V)
TIC12400-Q1 Order now 24     4.5     35     -24     40     1
2
5
10
15    
-40 to 125     HTSSOP | 38     38HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 38)     SPI     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    
Wetting Current Diagnostic
ADC Self-Diagnostic    
3     5.5    
TIC10024-Q1 Order now 24     4.5     35     -24     40     1
2
5
10
15    
-40 to 125     HTSSOP | 38     38HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 38)     SPI     Polling mode
Configurable wetting current
Overvoltage warning
Undervoltage warning
SPI
Interrupt wake-up operation
Withstands load dump condition and reverse polarity condition    
  3     5.5