Texas Instruments TPS37044BJOFDDFR

Overview

TPS37044BJOFDDFR from Texas Instruments is a quad-channel adjustable window voltage supervisor in an 8-pin SOT-23 (DDF) package, featuring ±0.25% typical threshold accuracy, 0.75% typical built-in hysteresis, 10 ms fixed reset delay, and open-drain outputs. It monitors four independent 0.8 V rails (±4%) in industrial control and safety-critical power sequencing applications.

For engineers reviewing the TPS37044BJOFDDFR datasheet, TPS37044BJOFDDFR pinout, TPS37044BJOFDDFR application, or TPS37044BJOFDDFR equivalent, key selection criteria include quad-channel adjustable window supervision with symmetric 0.8 V thresholds, ultra-low 15 µA max quiescent current, –40°C to +125°C operation, functional safety compliance (SIL 1 hardware), and SOT-23-8 footprint compatibility.

Technical Context

The TPS37044BJOFDDFR implements four independent window comparators with internal precision resistor dividers-no external components required for 0.8 V threshold setting. Each channel uses separate SENSEx inputs and open-drain RESETx outputs, with fault detection latency ≤10 µs and glitch immunity ≥2 µs at 5% overdrive.

Its architecture integrates bandgap reference, UV/ OV comparators, oscillator-based timing counter, and POR/UVLO circuitry. The device supports asymmetric tolerance programming (e.g., –4% UV / +4% OV per channel) and operates across 1.7–6.0 V VDD while monitoring rails up to 5.55 V on SENSE pins.

Key Specifications

Pinout & Package

Package: DDF (SOT-23-8), 1.6 mm × 2.9 mm body size, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS37044LJOJDDFR, the TPS37044BJOFDDFR provides tighter 0.8 V threshold matching and shorter 10 ms reset timing-critical for high-speed digital power sequencing. Versus TPS37044BJOFDDFRQ1, it offers identical functionality at lower cost and lead time for non-automotive deployments.

Availability

TPS37044BJOFDDFR is available at Aetrix Electronics and suitable for industrial motor control, medical imaging equipment, grid infrastructure monitoring, and automotive ADAS domain controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS37044BJOFDDFR 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 power management technologies with decades of industrial and automotive qualification expertise.

The TPS3704x family was designed specifically for high-accuracy, multi-rail power supervision in safety-critical systems-emphasizing low IQ, integrated hysteresis, and functional safety readiness for factory automation and medical equipment.

FAQ

What is the exact threshold voltage and tolerance for each channel of the TPS37044BJOFDDFR?

The TPS37044BJOFDDFR is factory-configured for four identical adjustable window channels, each set to monitor 0.8 V with ±4% tolerance (i.e., UV = 0.768 V, OV = 0.832 V). This is confirmed in Table 4-1 of the datasheet and applies across –40°C to +125°C with ±1% total accuracy. No external resistors are needed-the internal precision dividers deliver this specification directly.

Does the TPS37044BJOFDDFR require external pull-up resistors on its RESET outputs?

Yes, the TPS37044BJOFDDFR features open-drain RESET1 and RESET2 outputs, which require external pull-up resistors to VDD or another appropriate logic rail. Typical values range from 4.7 kΩ to 10 kΩ. This design enables wired-OR reset bus configurations and level-shifting flexibility-critical for interfacing with diverse microcontrollers and FPGAs in the TPS37044BJOFDDFR's target applications.

Can the TPS37044BJOFDDFR monitor voltage rails higher than its VDD supply?

Yes, the TPS37044BJOFDDFR supports SENSE input voltages from 0 V to 5.55 V independently of VDD, which operates from 1.7 V to 6.0 V. This allows monitoring of higher-voltage rails (e.g., 3.3 V or 5 V) while powered from a lower VDD rail-enabling flexible power architecture partitioning without level shifters. This capability is explicitly specified in Section 6.3 Recommended Operating Conditions for the TPS37044BJOFDDFR.

What is the reset assertion timing behavior when multiple SENSE inputs violate their thresholds simultaneously on the TPS37044BJOFDDFR?

On the TPS37044BJOFDDFR, RESET1 asserts if either SENSE1 or SENSE2 violates its window, and RESET2 asserts if either SENSE3 or SENSE4 violates its window. Assertion occurs within ≤10 µs of threshold crossing (tPD), and the 10 ms reset delay timer starts upon first violation. Both outputs remain asserted for the full 10 ms period-even if individual rails recover earlier-ensuring robust system-level reset coordination.

Is the TPS37044BJOFDDFR qualified for automotive applications?

The TPS37044BJOFDDFR is the industrial-grade version and is not AEC-Q100 qualified. For automotive use, TI offers the pin-compatible TPS37044BJOFDDFRQ1 variant, which undergoes full automotive qualification including temperature cycling, HTOL, and ESD testing. The TPS37044BJOFDDFR itself is rated for –40°C to +125°C operation and meets functional safety requirements up to SIL 1 hardware capability-but lacks automotive-specific reliability documentation and change control.