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Automotive 24-input multiple-switch detection with SPI


Package | PIN: HTSSOP (DCP) | 38
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.32
10-24 $2.08
25-99 $1.93
100-249 $1.68
250-499 $1.55
500-749 $1.30
750-999 $1.07
1000+ $0.98


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C AmbientOperating Temperature
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification LevelC4B
  • 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

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Texas Instruments  TIC10024QDCPRQ1

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