TIC12400QDCPRQ1

The TIC12400-Q1 is an advanced Multiple Switch Detection Interface (MSDI) designed to detect external switch status in a 12-V automotive system. The TIC12400-Q1 features an integrated 10-bit ADC to monitor multi-position analog switches and a comparator to monitor digital switches independently of the MCU. Detection thresholds can be programmed for the ADC and the comparator to support various switch topologies and system nonidealities. 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 TIC12400-Q1 also offers integrated fault detection, ESD protection, and diagnostic functions for improved system robustness. The TIC12400-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.

Applications

• Body Control Module and Gateway
• Automotive Lighting
• Heating and Cooling
• Power Seats
• Mirrors

Key features

• 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 10-bit ADC for Multi-Position Analog Switch Monitoring
• Integrated Comparator with 4 Programmable Thresholds for Digital Switch Monitoring
• Ultra-low Operating Current in Polling Mode: 68 μA Typical (fPOLL = 64 ms, Ipol_ACT = 128 μs, All 24 Inputs Active, Comparator Mode, All Switches Open)
• Interfaces Directly to MCU Using 3.3 V/5V Serial Peripheral Interface (SPI) Protocol
• Interrupt Generation to Support Wake-Up Operation on All Inputs
• Integrated Battery and Temperature Sensing
• ±8 kV Contact Discharge ESD Protection on Input Pins per ISO-10605 With Appropriate External Components
• 38-Pin TSSOP Package