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Texas Instruments TIC12400QDCPRQ1
- Part No.:
- TIC12400QDCPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TIC12400QDCPRQ1.pdf
- Description:
- IC INTFACE SPECIALIZED 38HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
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Product details
Overview
TIC12400QDCPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive Multiple Switch Detection Interface (MSDI) with integrated 10-bit ADC and programmable comparator for monitoring up to 24 switch inputs in 12 V systems. It supports configurable wetting current (0–15 mA), withstands −24 V reverse polarity and 40 V load dump, and operates from −40°C to 125°C ambient.
For engineers reviewing the TIC12400QDCPRQ1 datasheet, TIC12400QDCPRQ1 pinout, TIC12400QDCPRQ1 application, or TIC12400QDCPRQ1 equivalent, this device delivers ultra-low polling-mode current (68 µA typical), SPI interface compatibility (3.3 V/5 V), integrated battery/temperature sensing, and ISO-10605 ±8 kV ESD protection on all 24 inputs - critical for body control module, lighting, power seat, and mirror subsystems.
Technical Context
The TIC12400QDCPRQ1 implements dual-sensing architecture: a 10-bit ADC for analog multi-position switches (e.g., rotary dials, slider controls) and a comparator with four programmable thresholds (2 V, 2.7 V, 3 V, 4 V) for digital on/off detection. Input configuration supports both ground-referenced and battery-referenced switches across 10 of its 24 channels.
It operates in continuous or polling mode; polling mode uses a programmable timer (tPOLL = 64 ms typical) to activate wetting current only during sampling, reducing average VS supply current to 68 µA. Fault detection includes over-voltage (35 V trip), under-voltage (3.85 V rising threshold), and thermal warning, all signaled via open-drain /INT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input count | 24 direct switch inputs; 10 configurable for ground- or battery-referenced topology |
| Wetting current range | 0 mA, 1 mA, 2 mA, 5 mA, 10 mA, 15 mA - programmable per input to ensure reliable contact closure detection across varying switch resistance and environmental conditions |
| ADC resolution | 10-bit - enables precise position sensing for multi-state analog switches (e.g., HVAC blower speed, mirror angle) |
| Comparator thresholds | Four user-selectable levels: 2 V, 2.7 V, 3 V, 4 V - supports robust digital switch detection under varying VS and system noise |
| Supply voltage range | VS = 4.5 V to 35 V - covers full automotive 12 V system operation including load dump (40 V transient) and cold-crank (down to 4.5 V) |
| Operating temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and cabin applications |
| ESD protection | ±8 kV contact discharge per ISO-10605 on all IN0–IN23 pins - eliminates need for external TVS diodes in most automotive switch interfaces |
Pinout & Package
38-pin TSSOP package (9.70 mm × 4.40 mm), thermally enhanced with exposed pad (EP) connected to PCB ground for optimal thermal and ESD performance. Pin 1 is IN13; pins 37–38 and EP are VS power inputs and thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN23 | Configurable switch input | I/O terminals supporting wetting current sink/source; 10 channels support bidirectional (ground/battery) reference; all tolerate −24 V to +40 V transients |
| /CS, SCLK, SI, SO | SPI interface | Standard 4-wire SPI with 3.3 V/5 V logic compatibility; /CS active-low enables multi-device sharing; SO is open-drain capable |
| /INT | Interrupt output | Open-drain signal asserted low on switch state change or fault (OV/UV/TSD); supports MCU wake-up without polling |
| RESET | Hardware reset | Active-high input with internal 1 MΩ pull-down; high pulse ≥2 µs triggers full register reset and state reinitialization |
| VDD | Digital supply | 3.3 V to 5.0 V logic rail for SPI I/Os; must be present during communication to prevent leakage and data corruption |
| VS, EP | Main power & thermal path | Dual VS pins (37, 38) deliver 4.5–35 V system supply; exposed pad (EP) is electrically isolated but requires PCB ground connection for thermal dissipation and ESD robustness |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety-Capable | Documentation available to support ISO 26262 ASIL-B system-level safety analysis, including FIT rate data and diagnostic coverage guidance |
| Polling-mode ultra-low power | 68 µA typical VS supply current with all 24 inputs active in comparator mode - extends battery life in always-on vehicle modules |
| Integrated diagnostics | Real-time monitoring of VS over/under-voltage, die temperature, and internal LDO health - reduces need for external supervisory ICs |
| Programmable wetting current | Six discrete settings (0–15 mA) per input - eliminates mechanical contact bounce and oxidation issues across diverse switch types and aging profiles |
| Multi-topology switch support | 10 inputs configurable as either current sink (ground-switched) or source (battery-switched) - simplifies wiring harness design in mixed-reference body electronics |
Applications
| Body Control Module (BCM) | Automotive Lighting |
|---|---|
Use Scenario: Monitoring door lock/unlock, window up/down, trunk release, and interior lamp toggle switches in centralized BCM. IC Role / Device Role / Timing Role: Primary switch interface IC performing real-time status acquisition, wetting current management, and interrupt-driven wake-up for microcontroller. Use Value: Reduces MCU polling overhead and system power by >90% versus discrete resistor-divider + GPIO solutions; supports fail-safe detection of stuck-open/closed switches via ADC residual voltage analysis. | Use Scenario: Detecting headlamp high/low beam selector, fog lamp enable, and turn signal cancel switches in lighting control units. IC Role / Device Role / Timing Role: High-immunity switch monitor interfacing directly to 12 V battery-referenced or chassis-grounded switches without level-shifting. Use Value: Withstands 40 V load dump and −24 V reverse polarity events common in lighting circuits; ±8 kV ESD rating eliminates external protection components on each switch line. |
| Power Seats | Mirrors |
Use Scenario: Reading multi-position potentiometric switches for seat position memory, lumbar support, and recliner angle adjustment. IC Role / Device Role / Timing Role: ADC-based analog position encoder with 10-bit resolution and programmable wetting current to compensate for contact resistance drift. Use Value: Enables sub-degree angular resolution and repeatable seat position recall across temperature extremes (−40°C to 125°C), validated per AEC-Q100. | Use Scenario: Monitoring fold/unfold, left/right/up/down, and auto-dimming enable switches in power mirror control modules. IC Role / Device Role / Timing Role: Dual-mode interface handling both digital toggle switches and analog position sensors (e.g., mirror angle feedback potentiometers). Use Value: Single-chip solution replaces separate comparator + ADC + protection ICs; reduces BOM count by 3+ components and PCB area by >35%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiple switch detection interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65381A-Q1 | Integrated PMIC + MSDI; includes buck regulators, LDOs, and watchdog; no ADC; wetting current fixed at 10 mA | Targeted for MCU power management + switch monitoring in compact ECUs; lacks analog position sensing capability | Select when combined power regulation and basic switch detection are required, and analog multi-position sensing is unnecessary |
| MAX14912 | 12-channel industrial-grade high-side switch with integrated diagnostics; no ADC; wetting current not supported; rated for −40°C to +105°C only | Designed for PLC I/O modules and industrial control; lacks automotive qualification and battery-referenced input flexibility | Select for non-automotive 24 V systems requiring high-side drive + diagnostics, where AEC-Q100 and analog sensing are not needed |
Compared with TPS65381A-Q1 and MAX14912, the TIC12400QDCPRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 24-channel scalability, integrated 10-bit ADC for analog position sensing, and six-step programmable wetting current - making it the only option for automotive body electronics requiring both digital switch event capture and precision analog switch position measurement in a single IC.
Availability
TIC12400QDCPRQ1 is available at Aetrix Electronics and suitable for body control modules, automotive lighting systems, and power seat/mirror control units requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for TIC12400QDCPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive electronics, with decades of automotive qualification expertise and broad functional safety documentation support.
The TIC12400QDCPRQ1 belongs to TI's automotive switch detection interface product line, designed specifically to replace discrete resistor networks and GPIO expanders in body electronics - delivering integrated diagnostics, ultra-low-power polling, and robust 12 V system interfacing for next-generation vehicle control modules.
FAQ
What is the maximum number of switch inputs supported by the TIC12400QDCPRQ1?
The TIC12400QDCPRQ1 supports up to 24 direct switch inputs. Of these, 10 inputs (IN0–IN9) are configurable to monitor switches connected either to ground or to battery voltage, while the remaining 14 (IN10–IN23) are dedicated ground-referenced inputs. This architecture enables flexible integration into mixed-reference automotive wiring harnesses without external level-shifting circuitry.
Does the TIC12400QDCPRQ1 include built-in ESD protection for automotive environments?
Yes, the TIC12400QDCPRQ1 provides ±8 kV contact discharge ESD protection on all 24 switch input pins (IN0–IN23) per ISO-10605, when used with appropriate external RC network components. This eliminates the need for discrete TVS diodes in most automotive switch interface designs and meets stringent OEM ESD immunity requirements without additional board space or BOM cost.
How does the TIC12400QDCPRQ1 reduce system power consumption in always-on automotive modules?
The TIC12400QDCPRQ1 reduces system power via its polling mode, which activates wetting current only during brief sampling windows (tPOLL_ACT = 128 µs typical). With all 24 inputs active in comparator mode, average VS supply current is just 68 µA - over 95% lower than continuous-mode operation. This enables extended battery life in parked vehicle scenarios such as key-off monitoring of door/trunk switches.
Can the TIC12400QDCPRQ1 monitor both digital and analog switches simultaneously?
Yes, the TIC12400QDCPRQ1 concurrently monitors digital and analog switches using independent signal paths: its integrated comparator handles binary on/off detection with four programmable thresholds (2 V, 2.7 V, 3 V, 4 V), while its 10-bit ADC digitizes analog voltage dividers for multi-position switches like rotary knobs or linear sliders - all within a single TIC12400QDCPRQ1 device without MCU intervention.
What automotive qualification standards does the TIC12400QDCPRQ1 meet?
The TIC12400QDCPRQ1 is AEC-Q100 qualified for Grade 1 operation (−40°C to +125°C ambient), with HBM ESD classification Level H2 (±2 kV) and CDM Level C4B (±500 V). It also supports functional safety development per ISO 26262, with documented failure-in-time (FIT) rates, diagnostic coverage metrics, and safety manual available from Texas Instruments for ASIL-B system integration.
TIC12400QDCPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Switch Monitoring
- Interface:
- MSDI (Multiple Switch Detection)
- Voltage - Supply:
- 4.5V ~ 35V
- Supplier Device Package:
- 38-HTSSOP
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
TIC12400QDCPRQ1 FAQ
1.How can I place an order for TIC12400QDCPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TIC12400QDCPRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TIC12400QDCPRQ1 reliable?
The price and inventory of TIC12400QDCPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIC12400QDCPRQ1 is usually 5 days.
3.What payment methods are accepted for TIC12400QDCPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIC12400QDCPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TIC12400QDCPRQ1?
TIC12400QDCPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TIC12400QDCPRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TIC12400QDCPRQ1?
For technical support, including TIC12400QDCPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIC12400QDCPRQ1 requirements.
6.How does Aetrix verify that TIC12400QDCPRQ1 is sourced from the original manufacturer or authorized distributors?
All TIC12400QDCPRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TIC12400QDCPRQ1 meets industry standards.
7.What is the process for return or replacement of TIC12400QDCPRQ1?
All TIC12400QDCPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TIC12400QDCPRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TIC12400QDCPRQ1 part is unused and in its original packaging.
Return procedure for TIC12400QDCPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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