Automotive 24-Input Multiple-Switch Detection With SPI Interface - TIC12400-Q1

TIC12400-Q1 (ACTIVE)

Automotive 24-Input Multiple-Switch Detection With SPI Interface

 

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 Compare all products in Switch and Sensor Monitors

 
No. 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
Diagnostics
Logic Voltage (Min) (V)
Logic Voltage (Max) (V)
TIC12400-Q1 TIC10024-Q1
24    24   
4.5    4.5   
35    35   
-24    -24   
40    40   
1
2
5
10
15   		 1
2
5
10
15   
-40 to 125    -40 to 125   
HTSSOP    HTSSOP   
38HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP)    38HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP)   
SPI    SPI   
Wetting Current Diagnostic
ADC Self-Diagnostic   		  
3    3   
5.5    5.5   
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