SGMCD1024xQ

Active

Automotive Grade

24-Channel Multiple Switch Detection Interface with Adjustable Wetting Current for Automotive Applications

SGMCD1024xQ.pdf

The SGMCD1024xQ is an advanced multiple switch detection interface (MSDI) designed to detect external switch status for automotive applications.

The SGMCD1024DQ integrates a 10-bit ADC for multi-position analog switch monitoring and a comparator for digital switch detection independent of the MCU. It features programmable thresholds to accommodate diverse switch types and system tolerances, ensuring precise operation in real-world conditions.

The SGMCD1024AQ features a comparator with adjustable thresholds to monitor digital switches independently of the MCU.

The SGMCD1024xQ device features 24 direct switch inputs, with 10 switch-to-power (SP) inputs, which are configurable to either switch-to-ground (SG) or switch-to-battery (SB), and 14 channels configurable to SG only. Each input supports multiple distinct programmable wetting current configurations, enabling optimized performance across diverse applications. To enhance energy efficiency, the system incorporates wake-up functionality for all switches, minimizing the need for sustained MCU activity. This solution integrates advanced protection features including fault detection, ESD protection, and diagnostic capabilities to ensure robust system operation. The device offers dual operational modes — continuous mode and polling mode. Continuous mode provides constant wetting current to detect the switch status. Polling mode employs periodic wetting current activation through a programmable timing interval, drastically reducing power consumption by sampling input statuses at scheduled intervals.

The device is AEC-Q100 qualified (Automotive Electronics Council (AEC) standard Q100 Grade 1) and it is suitable for automotive applications.

The SGMCD1024xQ is available in a Green TSSOP-38 (Exposed Pad) package.

FEATURES

AEC-Q100 Qualified for Automotive Applications
Device Temperature Grade 1
T_A = -40℃ to +125℃
Functional Safety
- Available Documentation in the Design of Functional Safety Systems
Detect Over-Voltage and Under-Voltage Faults for 12V Automotive Applications
Monitor Up to 24 Direct Switch Inputs:
- 10 Switch-to-Power (SP) Inputs
- 14 Switch-to-Ground (SG) Inputs
Switch Input Detection Ranging from -24V to 40V
Selectable Wetting Current Levels:
- SGMCD1024AQ: 0mA, 1mA, 2mA and 5mA
- SGMCD1024DQ: 0mA, 1mA, 2mA, 5mA, 10mA, and 15mA
Integrated 10-bit ADC for Multi-Position Analog Switch Monitoring (SGMCD1024DQ Only)
Integrated Comparator with 4 Programmable Thresholds for Digital Switch Monitoring
Ultra-Low Standby Current in Polling Mode:
- SGMCD1024AQ: 110μA (TYP)
- SGMCD1024DQ: 120μA (TYP)
Use 3.3V/5.0V SPI Protocol to Communicate Directly with MCU
Wake-up Functionality for All Inputs
Integrated Battery and Temperature Sensing
±8kV ISO-10605 Contact Discharge on Input Pins, with Required External Components
Available in a Green TSSOP-38 (Exposed Pad) Package

APPLICATIONS

Body Control and Gateway
Lighting and Mirrors
Air Conditioning System
Power Seats

Ordering Information

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGMCD1024AQPTS38G/TR	Active	TSSOP-38 (Exposed Pad)	38	YES	YES	YES	YES	MSL3	-40℃ to +125℃	View	View	1-24 units : $3.5/unit 25-99 units : $3/unit 100-249 units : $2.5/unit 250-499 units : $2/unit 500-999 units : $1.75/unit 1000-9999 units : $1.3/unit
SGMCD1024DQPTS38G/TR	Active	TSSOP-38 (Exposed Pad)	38	YES	YES	YES	YES	MSL3	-40℃ to +125℃	View	View	1-24 units : $7/unit 25-99 units : $6/unit 100-249 units : $5/unit 250-499 units : $4/unit 500-999 units : $3.5/unit 1000-9999 units : $2.6/unit

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.