TIC10024-Q1 Datasheet, PDF (1/81 Pages) Texas Instruments – 24-Input Multiple Switch Detection Interface (MSDI) Device With Adjustable Wetting Current for Automotive Systems

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TIC10024-Q1
SCPS268 – SEPTEMBER 2017
TIC10024-Q1 24-Input Multiple Switch Detection Interface (MSDI) Device
With Adjustable Wetting Current for Automotive Systems
1 Features
•1 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 Comparator with 4 Programmable
Thresholds for Digital Switch Monitoring
• Ultra-low Operating Current in Polling Mode:
68 μA Typical (t_POLL = 64 ms, t_{POLL_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
2 Applications
• Body Control Module and Gateway
• Automotive Lighting
• Heating and Cooling
• Power Seats
• Mirrors
3 Description
The TIC10024-Q1 is an advanced Multiple Switch
Detection Interface (MSDI) device designed to detect
external switch status in a 12-V automotive system.
The TIC10024-Q1 features a comparator with
adjustable thresholds to monitor digital switches
independently of the MCU. 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 TIC10024-Q1
also offers integrated fault detection and ESD
protection for improved system robustness. The
TIC10024-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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TIC10024-Q1
TSSOP (38)
9.70 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
VBAT
Simplified Schematic
Voltage
Regulator
GND
37 38
VS VS
13 IN0
VDD 19
14 IN1
25 IN2
33 IN9
/INT 24
/CS 15
SCLK 16
SI 17
34 IN10
35 IN11
SO 18
TIC10024-Q1
RESET 21
36 IN12
CAP_A 20
12 IN23
CAP_D 23
CAP_PRE 22
VDD
/INT
/CS
SCLK ^MCU
MOSI
MISO
GPIO
EP
AGND 9
DGND 28
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.