Texas Instruments TPS38900603NRTERQ1

Overview

TPS38900603NRTERQ1 from Texas Instruments is an ASIL-D functional safety-compliant six-channel I²C-programmable window voltage supervisor with two remote sense inputs, ±6 mV threshold accuracy over –40°C to +125°C, 2.5 V to 5.5 V supply range, and integrated 8-bit ADC for real-time rail telemetry-designed for power-rail monitoring in automotive ADAS domain controllers.

For engineers reviewing the TPS38900603NRTERQ1 datasheet, TPS38900603NRTERQ1 pinout, TPS38900603NRTERQ1 application, or TPS38900603NRTERQ1 equivalent, this device supports configurable glitch immunity, sequence logging with SYNC-tagged rail timestamping, CRC/PEC error checking, and programmable UV/OV thresholds in 5 mV (0.2–1.475 V) or 20 mV (0.8–5.5 V) steps-critical for SIL-3 system compliance and multichannel sequencing coordination.

Technical Context

The TPS38900603NRTERQ1 implements six independent high-accuracy SVS comparators with internal resistor networks eliminating external threshold-setting components, plus dual remote sense inputs (RS_1/2) enabling precise core-rail voltage measurement by compensating for PCB trace IR drop. Its digital core integrates a dedicated fault/sequence logging FSM, OTP-configurable boot behavior, and BIST-enabled startup verification.

I²C interface operates up to 1 MHz (Fast Mode Plus), supporting register-based configuration of reset delays (200 µs to 200 ms), deglitch filters (0.1–102.4 µs), and pin functionality mapping-including NIRQ assertion latency as low as 25 µs for non-OV/UV faults and 650 ns for HF OV/UV events with 1× scaling.

Key Specifications

Pinout & Package

TPS38900603NRTERQ1 uses a 16-pin WQFN package (RTE variant) with 0.4 mm pitch and exposed thermal pad (Pin 17). The package measures 3 mm × 3 mm nominal footprint and supports reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel voltage supervisor applications.

Compared with TPS389R0603NRTERQ1, the TPS38900603NRTERQ1 omits NRST but retains identical monitoring precision, sequencing capability, and safety certification-making it optimal for interrupt-driven fault handling. Versus TPS38800603NRTERQ1, it delivers higher diagnostic coverage, tighter accuracy, and full ASIL-D support at higher system-level assurance cost.

Availability

TPS38900603NRTERQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, electric powertrain inverters, radar SoC power management, and camera module sequencing requiring stable component supply and long-term lifecycle support.

Supply support for TPS38900603NRTERQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management and functional safety solutions.

The TPS389x-Q1 product line delivers multichannel voltage supervisors engineered for ISO 26262 ASIL-D systems-targeting ADAS, electrification, and zonal architecture power monitoring where deterministic fault response and traceable diagnostics are mandatory.

FAQ

What is the maximum I²C clock frequency supported by TPS38900603NRTERQ1?

The TPS38900603NRTERQ1 supports I²C Fast Mode Plus operation up to 1 MHz, enabling rapid configuration of thresholds, reset delays, and glitch filters during system boot. This speed reduces initialization latency in time-critical automotive applications while maintaining compatibility with standard I²C controllers. The device meets all timing requirements including tLOW, tHIGH, and trDA specifications defined in the datasheet for 1 MHz operation.

Does TPS38900603NRTERQ1 include a hardware reset output (NRST)?

No, the TPS38900603NRTERQ1 does not include an NRST output. It provides only the active-low open-drain NIRQ interrupt output. For designs requiring hardware reset assertion, the pin-compatible TPS389R0603NRTERQ1 variant-identical in monitoring capability and ASIL-D compliance-adds the NRST pin. Both share the same 16-pin WQFN package and I²C register map.

How does the remote sense feature work on TPS38900603NRTERQ1?

The TPS38900603NRTERQ1 uses RS_1/2 pins to measure voltage drop across PCB traces feeding high-current rails, subtracting that drop from MON1/MON2 readings to report true load-point voltage. This compensates for IR loss up to ±100 mV, ensuring ±6 mV threshold accuracy at the actual SoC core pin-not just at the regulator output. Remote sense is enabled via I²C register configuration and requires Kelvin connections to the load.

What safety certifications apply to TPS38900603NRTERQ1?

The TPS38900603NRTERQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and developed to meet ASIL-D requirements per ISO 26262, with documented hardware and systematic capability evidence. It includes CRC/PEC checking, BIST, fault logging, and redundant monitoring paths-all verified in TI's functional safety documentation package SNVSBM4D. No additional safety hardware is required to achieve ASIL-D decomposition.

Can TPS38900603NRTERQ1 monitor voltages below 0.2 V?

No, the TPS38900603NRTERQ1 has a minimum monitor input voltage of 0.2 V per its electrical specifications. Voltages below this level fall outside the guaranteed operating range and may result in undefined comparator behavior or inaccurate ADC readings. For sub-0.2 V monitoring, external signal conditioning (e.g., gain stage) is required before connecting to MONx inputs.