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Product details

Parameters

Number of inputs 24 Operating voltage (Min) (V) 6.5 Operating voltage (Max) (V) 24 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 105 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 open-in-new Find other Multi-switch detection interface (MSDI) ICs

Package | Pins | Size

HTSSOP (DCP) 38 43 mm² 9.7 x 4.4 open-in-new Find other Multi-switch detection interface (MSDI) ICs

Features

  • Operates with Supply Voltage (VS) from 6.5 V to 35 V with Over-voltage and Under-voltage Warning
  • Monitors up 24 Direct Switch Inputs with 10 Inputs Configurable to Monitor Switches Connected to Either Ground or Supply
  • Switch Input Withstands 40 V and Reverse Supply Condition Down to -24 V
  • 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 Threshold for Input 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 Supply and Temperature Sensing
  • ±8 kV Contact Discharge ESD Protection on Input Pins per IEC 61000-4-2 With Appropriate External Components
  • 38-Pin TSSOP Package

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Description

The TIC12400 is an advanced Multiple Switch Detection Interface (MSDI) device designed to detect external switch statuses. The TIC12400 supports 24 direct inputs, with 10 inputs configurable to monitor digital I/O switches. 6 wetting current settings can be programmed for each input to support different application scenarios. The TIC12400 features an integrated 10-bit ADC to monitor multi-position analog switches and a comparator to monitor digital switches independently of the MCU. 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 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 also offers various fault detection and diagnostic features for improved system robustness.

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Technical documentation

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Type Title Date
* Datasheet TIC12400 24-Input Multiple Switch Detection Interface (MSDI) Device With Integrated ADC and Adjustable Wetting Current datasheet Sep. 22, 2017
User guide TIC12400 EVM User's Guide Oct. 03, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
199
Description
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 (...)
Features
  • EVM connects to a computer using USB cable and lets you program configurations and read status information
  • EVM incorporates temperature and current measurements by using the GUI and has many configurable hardware options
  • Kit features the ability to do digital switches and resistor coded switches or (...)

Design tools & simulation

SIMULATION MODEL Download
SCPM044.IBS (255 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI 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 (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (DCP) 38 View options

Ordering & quality

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