TPS3430WDRCR

Overview

The TPS3430WDRCR is a window watchdog timer manufactured by Texas Instruments, designed for automotive and industrial applications. It operates within a supply voltage range of 1.6 V to 6.5 V and features a threshold voltage of 6.5 V. The device provides an active low, open-drain output with a programmable reset delay. It achieves high timing accuracy, specified at ±2.5% typical at 25°C and ±15% across the full temperature range. The component is housed in a compact 10-pin VSON (3 mm × 3 mm) package and supports AEC-Q100 qualification for automotive use.

Feature Summary

• Factory-programmed precision watchdog timer with ±15% accuracy over the full temperature range (-40°C to +125°C).
• Programmable watchdog reset delay via external capacitor or factory default settings.
• Low power consumption with a typical supply current of 10 µA.
• Watchdog disable function via SET pin to prevent unnecessary timeouts during development or power-up.

Applications

• Automotive window systems and safety-critical controllers.
• Video surveillance and sensor transmitters.
• HVAC thermostats and fire safety detectors.
• Microcontroller and DSP system supervision.

Procurement Notes

Verify the specific suffix 'WDRCR' against the manufacturer's official datasheet to confirm the exact factory-programmed timeout value and reset delay configuration. Ensure compatibility with the target PCB footprint for the 10-VSON package. Confirm that the required timing parameters align with the system's watchdog requirements before finalizing procurement.

Selection Notes

Select this component when a dedicated window watchdog timer with fixed, factory-set timing is required to minimize external component count. The TPS3430 is suitable for designs needing a single monitored input and an open-drain output. Consider the 10 µA quiescent current for battery-sensitive applications. Verify that the 6.5 V maximum supply voltage meets the system's rail specifications.

Part Context

The TPS3430 belongs to the TPS343x family of window watchdog timers from Texas Instruments. This family includes variants such as the TPS3430-Q1, which carries AEC-Q100 automotive qualification. The WDRCR suffix indicates the specific tape-and-reel packaging and the particular factory-programmed timing configuration selected by the manufacturer.

Replacement Considerations

Direct replacements include other members of the TPS343x family, such as the TPS3430-Q1, provided the timing configurations match. Alternative window watchdog timers from other manufacturers may require significant circuit redesign due to differences in pinout, control logic, and timing programming methods.