Texas Instruments TPS37043A5OFDDFRQ1

Overview

TPS37043A5OFDDFRQ1 from Texas Instruments is an automotive-grade triple-channel window voltage supervisor with ±0.25% typical threshold accuracy, fixed 10ms reset delay, and open-drain active-low outputs. It monitors three independent rails-3.3V (±4%), 1.8V (±4%), and 1.2V (±4%)-in ASIL-A compliant systems for power sequencing and fault detection in ADAS domain controllers.

For engineers reviewing the TPS37043A5OFDDFRQ1 datasheet, TPS37043A5OFDDFRQ1 pinout, TPS37043A5OFDDFRQ1 application, or TPS37043A5OFDDFRQ1 equivalent, this page delivers verified functional safety context, channel-specific threshold tolerances, SOT-23-8 pin mapping, and validated alternatives for automotive power-rail monitoring designs.

Technical Context

The TPS37043A5OFDDFRQ1 implements independent per-channel window supervision using internal precision resistor dividers-no external components required for threshold setting. Each channel supports configurable UV/OV detection with asymmetric tolerance programming (e.g., –4% UV / +4% OV) and built-in 0.75% typical hysteresis to prevent false resets on noisy rails.

It integrates a low-power bandgap reference, glitch-immune comparators (2µs immunity at 5% overdrive), and a fixed 10ms reset timeout counter. The device operates across –40°C to +125°C with 5.5µA typical quiescent current and supports VDD from 1.7V to 6.0V, enabling direct monitoring of core, I/O, and analog supply rails in TI AM62x/TDA4-based platforms.

Key Specifications

Pinout & Package

Package: DDF (8-pin SOT-23, 1.6mm × 2.9mm). Compact footprint enables high-density placement near SoC power rails.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS37043A4OFDDFRQ1 and TPS37043A8OFDDFRQ1, the TPS37043A5OFDDFRQ1 provides the tightest combined threshold accuracy (±4% across all three rails) and matches the 1.2V rail requirement of AM62x/TDA4 automotive processors-making it the preferred choice for new ADAS and infotainment designs demanding highest voltage-monitoring fidelity.

Availability

TPS37043A5OFDDFRQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment head units, and HEV/EV battery interface modules requiring stable component supply with full AEC-Q100 traceability and functional safety documentation.

Supply support for TPS37043A5OFDDFRQ1 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 ICs, with decades of automotive qualification expertise and broad safety-certified portfolio coverage.

The TPS3704-Q1 product line delivers high-accuracy, multi-channel voltage supervision for next-generation automotive SoCs-designed specifically to replace discrete resistor-based supervisors in ADAS, infotainment, and electrification systems where rail margin is shrinking and functional safety is mandatory.

FAQ

What is the exact threshold voltage and tolerance for each channel of the TPS37043A5OFDDFRQ1?

The TPS37043A5OFDDFRQ1 has fixed thresholds: SENSE1 = 3.3V ±4%, SENSE2 = 1.8V ±4%, and SENSE3 = 1.2V ±4%. These values are factory-trimmed and specified over –40°C to +125°C with ±1% total accuracy including temperature drift and initial tolerance. No external resistors are required-the internal precision dividers set these thresholds permanently.

Does the TPS37043A5OFDDFRQ1 support push-pull outputs or only open-drain?

The TPS37043A5OFDDFRQ1 uses open-drain active-low outputs exclusively (RESET1–RESET3). Its orderable suffix "O" in the naming convention confirms open-drain topology. Each output requires an external pull-up resistor to its respective rail voltage (e.g., 3.3V for RESET1). Push-pull variants exist in the TPS3704-Q1 family (e.g., suffix "L"), but TPS37043A5OFDDFRQ1 is not one of them.

Can the TPS37043A5OFDDFRQ1 monitor voltage rails lower than 1.2V?

No-the TPS37043A5OFDDFRQ1 is factory-configured for 3.3V, 1.8V, and 1.2V rails only. Its internal resistor network is trimmed for those exact thresholds. For sub-1.2V monitoring (e.g., 0.8V or 0.4V), TI offers adjustable variants like TPS37043LJOFDDFRQ1 or TPS37043CJOFDDFRQ1, which use external resistor dividers on SENSEx pins to set custom thresholds down to 0.4V.

Is the 10ms reset delay of the TPS37043A5OFDDFRQ1 programmable or fixed?

The 10ms reset delay is fixed and non-programmable. It is selected at wafer sort and cannot be altered post-manufacture. This value is encoded in the part number suffix "F" (per Figure 4-1). Other delay options (e.g., 20µs, 35ms, 1200ms) require different orderable numbers such as TPS37043ZJOFDDFRQ1 (35ms) or TPS37043DJOFDDFR (20µs).

How does the TPS37043A5OFDDFRQ1 handle power supply sequencing during startup?

The TPS37043A5OFDDFRQ1 incorporates a 1ms startup delay (tSTRT) plus its 10ms reset delay (tD), ensuring RESET outputs remain asserted until VDD stabilizes above VPOR (0.7V) and monitored rails settle within their windows. This prevents premature release of reset signals during ramp-up-critical for reliable SoC initialization in automotive environments with slow-rising battery supplies.