TIC10024-Q1 Datasheet, PDF (65/81 Pages) Texas Instruments – 24-Input Multiple Switch Detection Interface (MSDI) Device With Adjustable Wetting Current for Automotive Systems

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10 Application and Implementation
TIC10024-Q1
SCPS268 – SEPTEMBER 2017
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
The TIC10024-Q1 is an advanced 24-input Multiple Switch Detection Interface (MSDI) device designed to detect
external mechanical switch status in a 12-V automotive system by acting as an interface between the switches
and the low- voltage microcontroller. The device offers a number of unique features to replace systems
implemented with discrete components, saving board space and reducing the bill of materials (BOM). The device
can also be configured into low-power polling mode, which provides significant savings on system power
consumption.
10.2 Digital Switch Detection in Automotive Body Control Module
The body control module (BCM) is an electronic control unit responsible for monitoring and controlling various
electronic accessories in a vehicle body. Detection of various mechanical switches status in a vehicle is one
important task handled by the BCM. Most switches inside the BCM are digital in nature, meaning they have
either an ON or an OFF state. The TIC10024-Q1 can detect up to 24 digital switches. The following application
diagram depicts how the TIC10024-Q1 is used in a BCM to detect an external digital switch and a detailed
design example is shown in the following sections.
VBAT
Voltage
Regulator
GND
VS VS
VDD
RESD
INx
/INT
CESD
SW
/CS
SCLK
SI
SO
TIC10024-Q1
Body Control Module
VDD
/INT
/CS
SCLK
MOSI
MISO
MCU
Copyright © 2016, Texas Instruments Incorporated
Figure 41. Using TIC10024-Q1 to Monitor a Digital Switch in Body Control Module Application
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TIC10024-Q1
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