TIC10024-Q1 Datasheet, PDF (12/81 Pages) Texas Instruments – 24-Input Multiple Switch Detection Interface (MSDI) Device With Adjustable Wetting Current for Automotive Systems

TIC10024-Q1
SCPS268 – SEPTEMBER 2017
8 Detailed Description
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8.1 Overview
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 TIC10024-Q1 is an integrated solution that replaces many discrete
components and provides integrated protection, input serialization, and system wake-up capability.
The device monitors 14 switches to GND and 10 additional switches that can be programmed to be connected to
either GND or V_BAT. It features SPI interface to report individual switch status and provides programmability to
control the device operation. The TIC10024-Q1 features an integrated comparator that can be used to monitor
external digital switch input status. The device has 2 modes of operation: continuous mode and polling mode.
The polling mode is a low-power mode that can be activated to reduce current drawn in the system by only
turning on the wetting current for a small duty cycle to detect switch status changes. An interrupt is generated
upon detection of switch status change and it can be used to wake up the microcontroller to bring the entire
system back to operation.
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