TPS3430WQDRCRQ1 - Automotive Window Watchdog | Texas Instruments
MPN: TPS3430WQDRCRQ1 ✓ ActiveTPS3430WQDRCRQ1 Overview
A window watchdog timer is a specialized form of watchdog timer that requires the monitored system to toggle its service signal within both an upper and lower timing boundary. Unlike a conventional timeout-only watchdog, a window watchdog can identify both a frozen system and operation that occurs too quickly. This makes it valuable in automotive controllers where correct task scheduling and deterministic control-loop activity must be verified.
The TPS3430-Q1 family provides programmable watchdog timing and programmable reset delay. Its SET pins can disable the watchdog during development or power-on sequences, preventing unintended timeout events before the monitored application is ready. The small 3.00 mm × 3.00 mm 10-VSON package supports compact automotive control modules while wettable flanks improve assembly inspection.
The TPS3430WQDRCRQ1 belongs to the clock and timing IC hierarchy as a supervisory timing device. Its watchdog window mechanism operates alongside the host processor rather than replacing it: the host must service the watchdog within the permitted interval, while the timer supplies a fault indication when service is missing, too early, or too late. The programmable reset delay adds a controlled response interval after a watchdog event.
Typical uses include automotive body controllers, motor-control modules, battery-management systems, electronic control units, and other safety-relevant embedded platforms. Its -40°C to +125°C rating and automotive-oriented ordering designation make it suitable for designs operating across extended industrial temperatures. For automotive production designs, engineers should also verify the complete device qualification and documentation package rather than relying only on the ordering code.
PCB implementation should place the watchdog and its associated bypass capacitor close to the host controller and power-entry circuitry. Keep the monitored service signal away from noisy power and switching-node routing, and validate both reset polarity and timeout behavior in the complete firmware state machine. The watchdog must remain disabled only during controlled startup or programming intervals.
This page consolidates the verified manufacturer and distributor information, distinguishes the automotive window watchdog function from ordinary timeout devices, and provides practical selection, comparison, and design guidance. Exact electrical limits, threshold ranges, pin functions, qualification details, and volume pricing should be confirmed against the current manufacturer documentation before design release.
Drop-in alternatives for TPS3430WQDRCRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS3430WQDRCRQ1 (same form factor and footprint) — differing in Package, Operating Temperature Range, Product Type, Watchdog Disable Control, Watchdog Reset Delay.
TPS3430WDRCR
✅ Drop-InContact for price
View Datasheet →TPS3430WQDRCR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS3431SDRBR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →TPS3431WQDRCRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS3430WQDRCRQ1 Specifications
| Device Type | Automotive window watchdog timer |
| Watchdog Window | Programmable |
| Watchdog Reset Delay | Programmable |
| Watchdog Disable Mechanism | SET pins |
| Operating Temperature Range | -40°C to +125°C |
| Package | 10-VSON, 3.00 mm × 3.00 mm |
| Package Pin Count | 10 pins |
| Mounting Type | Surface mount |
| Package Inspection Feature | Wettable flanks for optical inspection |
TPS3430WQDRCRQ1 wettable flanks for optical inspection Pin Configuration Guide
Pin configuration for TPS3430WQDRCRQ1 (wettable flanks for optical inspection package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TPS3430WQDRCRQ1.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS3430WQDRCRQ1 is suitable for 6 applications: Automotive Electronic Control Unit, Battery Management System, Motor Control and Chassis Module, Body and Lighting Controller, Industrial Automotive Gateway, Automotive Sensor Hub.
Automotive Electronic Control Unit
The TPS3430WQDRCRQ1 provides independent supervision of an automotive electronic control unit by requiring the processor firmware to service the watchdog within a defined window. Its programmable watchdog timing can detect both absent service and service outside the expected task interval, while the programmable reset delay provides a controlled fault-response interval. The -40°C to +125°C rating supports extended-temperature vehicle environments, and the compact 3.00 mm × 3.00 mm 10-VSON package preserves board area. The controller should use the SET pins only during controlled startup, release them once initialization is complete, and validate reset polarity and timing against the production firmware state machine.
Recommended
Battery Management System
A battery-management controller can use the TPS3430WQDRCRQ1 to verify that its supervisory firmware continues operating at the expected cadence. The window function rejects service that occurs too early as well as detecting missing service, helping expose scheduling errors or an abnormally fast task loop. The programmable reset delay allows the designer to coordinate a reset with other vehicle power-domain behavior. Its 10-VSON footprint supports compact modules, while the SET control should be sequenced with battery measurement, cell balancing, and communication initialization to avoid a false reset during startup.
Recommended
Motor Control and Chassis Module
The TPS3430WQDRCRQ1 is applicable to motor-control and chassis electronics where deterministic software execution is required for safe actuator management. Its window watchdog detects a stopped control task and also flags service arriving outside the expected interval, which can help diagnose scheduler faults. The component’s -40°C to +125°C range is appropriate for modules located near temperature-varying vehicle systems. The MCU should service the timer from a task whose latency is bounded and verified under load, and the circuit must be checked for ground-bounce and power-transient effects during actuator operation.
Recommended
Body and Lighting Controller
Body-control modules can deploy the TPS3430WQDRCRQ1 to monitor firmware that coordinates lighting, locks, windows, and other body functions. A programmable watchdog window helps distinguish a missing periodic service from an incorrectly timed response, while the reset delay provides flexibility for coordinating fault handling across multiple loads. The small package is useful in densely populated body controllers, and the -40°C to +125°C specification supports vehicle thermal conditions. Because body modules can experience large load-switching transients, the PCB should provide local decoupling and maintain a clean service-signal route.
Recommended
Industrial Automotive Gateway
A vehicle gateway that bridges communication networks can use the TPS3430WQDRCRQ1 to ensure its operating-system tasks remain active within the expected service window. The watchdog is especially useful when multiple communication and diagnostic routines must coexist because it detects both frozen software and improperly scheduled service. The device’s compact 3.00 mm × 3.00 mm VSON package fits gateway boards with limited area, while its extended temperature range supports placement within a vehicle enclosure. Firmware should define a precise service task, account for interrupt latency and flash execution time, and avoid placing the service edge near high-energy communication or power-conversion routes.
Recommended
Automotive Sensor Hub
A sensor-hub controller can use the TPS3430WQDRCRQ1 to monitor acquisition and processing tasks that must run on a predictable schedule. The window timing helps reveal both a stalled sampling task and unexpected early service, while the programmable reset delay can coordinate recovery of downstream sensor electronics. Its small package supports compact electronics near sensor assemblies, and the -40°C to +125°C range covers extended vehicle environments. The host should service the watchdog only after essential acquisition checks have completed, and the layout should isolate timing-sensitive traces from motor, lighting, and communication switching nodes.
Recommended
Recommended Products Summary
Engineering reference data for TPS3430WQDRCRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS3430WDRCR | TPS3430WQDRCR | TPS3431SDRBR | TPS3431WQDRCRQ1 |
|---|---|---|---|---|---|
| Package | 10-VSON (3x3) | 10-VSON (3x3) | 10-VSON (3x3) | 10-VSON (3x3) | 10-VSON (3x3) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Automotive window watchdog timer | Window watchdog timer | Window watchdog timer | Window watchdog timer | Automotive window watchdog timer |
| Automotive Designation | Yes, Q1 | No Q1 suffix | No Q1 suffix | No Q1 suffix | Yes, Q1 |
Key Differentiators
- Window timing detects improperly early service in addition to missing service (vs TPS3430WDRCR)
- Automotive ordering designation (vs TPS3430WQDRCR)
- Programmable watchdog and reset-delay behavior (vs TPS3431SDRBR)
- Startup control through SET pins (vs TPS3431WQDRCRQ1)
Design Notes
Do not leave the watchdog disabled in production. The SET pins are provided to suppress unintended timeouts during power-on, programming, and development, but they must be released only after the host controller, reset logic, and critical application tasks are ready. Review the complete startup state machine so a transient on SET cannot mask a later failure. Also verify that the watchdog service pulse is generated only after meaningful supervisory work rather than from an unconditional interrupt.
Route the watchdog service signal as a short trace between the host controller and the TPS3430WQDRCRQ1, away from switching nodes, motor drivers, and high di/dt power paths. Place the device and manufacturer-recommended bypass capacitor near the local supply and ground references. The 3.00 mm × 3.00 mm VSON package has wettable flanks for optical inspection, but production boards should still follow the land-pattern and assembly requirements in the official package drawing.
Validate the watchdog supply under the same voltage transients, ground movement, and reset events present in the completed vehicle module. Confirm that the device remains within its specified supply range while downstream loads are switched and during system reset. If a monitored power rail can collapse faster than the supervisor can respond, use the watchdog’s reset-delay and SET behavior deliberately rather than assuming the reset output alone will solve the sequencing problem.
Use a deliberate ground-reference strategy for the 10-VSON device and its host MCU. A timer with a clean command signal can still produce an unwanted reset when ground bounce shifts the apparent supply or service voltage. Keep high-current return paths from sharing narrow ground segments with the watchdog, and test reset behavior at the limits of motor, relay, and communication activity rather than only under a quiet bench condition.
Compliance Information
The verified data identifies TPS3430WQDRCRQ1 as an automotive Texas Instruments TPS3430-Q1 product but does not explicitly provide RoHS, REACH, lead-free, halogen-free, conflict-minerals, or exact AEC-Q100 qualification statements. These fields remain unknown rather than being inferred from the Q1 suffix.
