Texas Instruments TPS3703A4330DSERQ1

Overview

TPS3703A4330DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade overvoltage/undervoltage reset IC in a 6-pin WSON (DSE) package, featuring ±0.7% threshold accuracy across –40°C to +125°C, 7 µA max quiescent current, fixed 3.3 V window threshold with ±4% tolerance, and dual fixed time delay options (50 µs or 50 µs via CT pin configuration). It monitors critical power rails in ADAS domain controllers and digital cockpits.

For engineers reviewing the TPS3703A4330DSERQ1 datasheet, TPS3703A4330DSERQ1 pinout, TPS3703A4330DSERQ1 application, or TPS3703A4330DSERQ1 equivalent, this page delivers verified electrical specifications, validated pin functions, confirmed automotive qualification status, exact threshold and timing behavior per device variant, and real-world implementation guidance for safety-critical voltage supervision.

Technical Context

The TPS3703A4330DSERQ1 integrates two precision comparators with a trimmed internal resistor divider and reference to implement a fixed 3.3 V window supervisor-VIT+(OV) = 3.432 V and VIT–(UV) = 3.168 V (±4% tolerance)-with 0.55% typical hysteresis. Its CT pin supports only the D-variant fixed 50 µs delay (CT open or CT = VDD), not programmable capacitor-based timing.

This variant lacks user-adjustable thresholds and UV-only mode; it exclusively implements window detection. The SENSE and VDD pins are electrically isolated to support redundant monitoring, and RESET is an open-drain active-low output with 250 mV VOL at 5 mA, requiring external pull-up.

Key Specifications

Pinout & Package

TPS3703A4330DSERQ1 uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm, 0.5 mm pitch, wettable flank, thermally enhanced bottom paddle.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage/undervoltage supervision applications.

Compared with TPS3703A4330DSERQ1, the TPS3703A4330DSER lacks automotive qualification evidence and lifecycle support, while TLV809E33DBVRQ1 sacrifices overvoltage detection and programmable timing - making neither a drop-in replacement for safety-critical 3.3 V window supervision in ADAS or digital cockpit systems.

Availability

TPS3703A4330DSERQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, digital cockpit systems, and HEV/EV battery management subsystems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle assurance.

Supply support for TPS3703A4330DSERQ1 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 experience delivering AEC-Q100-qualified components for safety-critical vehicle systems.

The TPS3703-Q1 product line was designed specifically for automotive voltage supervision in ASIL-B and ASIL-C domains, integrating precision window detection, functional safety documentation, and redundant pin architecture to meet ISO 26262 requirements.

FAQ

What is the exact overvoltage and undervoltage threshold for TPS3703A4330DSERQ1?

The TPS3703A4330DSERQ1 has a fixed 3.3 V window threshold with ±4% tolerance: VIT+(OV) = 3.432 V and VIT–(UV) = 3.168 V, specified over –40°C to +125°C ambient temperature. These values are factory-trimmed and do not require external resistors - the "A4330" in the part number explicitly denotes this 3.3 V ±4% window configuration.

Does TPS3703A4330DSERQ1 support programmable reset delay using an external capacitor?

No, TPS3703A4330DSERQ1 does not support capacitor-programmable delay. As a "D"-variant device, it implements only the fixed 50 µs reset delay - selectable by leaving the CT pin floating or connecting it to VDD. Capacitor-based timing is reserved for variants A, B, and C; the D-variant's CT pin has no capacitor interface function.

Can TPS3703A4330DSERQ1 monitor a 3.3 V rail while being powered from a different supply voltage?

Yes, TPS3703A4330DSERQ1 supports independent SENSE and VDD rails. You may power VDD from 5 V (within 1.7–5.5 V range) while monitoring a separate 3.3 V supply on the SENSE pin - enabling true redundancy and meeting ASIL-B architectural requirements for fault-tolerant voltage supervision.

What is the maximum sink current capability of the RESET output on TPS3703A4330DSERQ1?

The RESET output of TPS3703A4330DSERQ1 is an open-drain structure rated for ±40 mA absolute maximum sink current. Under normal operation, it delivers ≤250 mV VOL at 5 mA sink (VDD = 5 V), supporting direct interface with 3.3 V or 5 V logic families when paired with an appropriate pull-up resistor (e.g., 10 kΩ to 3.3 V).

Is TPS3703A4330DSERQ1 qualified for functional safety applications?

Yes, TPS3703A4330DSERQ1 is functional safety-capable with documentation available to aid ISO 26262 system-level design. It includes AEC-Q100 Grade 1 qualification, built-in glitch immunity, hysteresis, and latched RESET output - features aligned with ASIL-B diagnostic coverage requirements for power supervision in automotive ECUs.