Texas Instruments TPS3779CDRYT

Overview

TPS3779CDRYT from Texas Instruments is a dual-channel, push-pull output voltage detector IC designed for precision power-rail monitoring in low-power systems. It features 10% factory-set hysteresis, ±1% VIT+ threshold accuracy over –40°C to 125°C, and 2 µA typical quiescent current. The device operates from 1.5 V to 6.5 V VDD and supports adjustable detection thresholds down to 1.2 V via external resistor dividers - used in microcontroller reset supervision and multi-rail sequencing.

For engineers reviewing the TPS3779CDRYT datasheet, TPS3779CDRYT pinout, TPS3779CDRYT application, or TPS3779CDRYT equivalent, this page delivers verified functional specifications, validated pin roles, confirmed thermal and timing behavior, and real-world implementation guidance for battery-powered and industrial embedded designs.

Technical Context

The TPS3779CDRYT integrates two independent high-accuracy comparators with internal reference trimming, each driving a dedicated push-pull output (OUT1/OUT2). Its 10% hysteresis (VHYS = 10% × VIT+) ensures immunity to rail noise during undervoltage transitions, with propagation delays of 5.5 µs (rising) and 10 µs (falling) at TJ = 25°C.

Threshold tracking is maintained across temperature: VIT+ deviation remains within ±0.4% from –40°C to +120°C, and supply current stays ≤6.5 µA over full temperature and voltage range (1.5 V–6.5 V). Startup delay is fixed at 570 µs after VDD crosses VDD(min), ensuring deterministic power-on reset timing.

Key Specifications

Pinout & Package

TPS3779CDRYT is housed in a 1.45 mm × 1.00 mm, 6-pin µSON (DRY) package with wettable flanks for automated optical inspection. Thermal resistance RθJA = 306.7°C/W enables operation without heatsinking in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage detector applications.

Compared with TPS3779BDRYT and TPS3780CDRYT, the TPS3779CDRYT provides optimal noise immunity for general-purpose rail monitoring without external components - making it the default choice for new designs prioritizing simplicity, low BOM count, and robustness in industrial and portable applications.

Availability

TPS3779CDRYT is available at Aetrix Electronics and suitable for microcontroller reset supervision, multi-rail power sequencing, and battery-powered medical monitoring requiring stable component supply and long-term lifecycle support.

Supply support for TPS3779CDRYT 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 expertise in precision sensing and power integrity solutions.

The TPS37xx family was engineered specifically for high-accuracy, low-quiescent-current voltage monitoring in space- and power-constrained systems - targeting portable electronics, industrial automation, and automotive subsystems.

FAQ

What is the factory-set hysteresis value for TPS3779CDRYT?

The TPS3779CDRYT has a factory-set hysteresis of 10%, meaning the difference between VIT+ and VIT– equals 10% of the rising threshold voltage. This is confirmed in the Device Comparison Table and Electrical Characteristics section of the SBVS250 datasheet. For a nominal VIT+ of 1.194 V, VIT– is 1.074 V. No external components are needed to achieve this hysteresis.

Does TPS3779CDRYT require external pull-up resistors on its outputs?

No, TPS3779CDRYT does not require external pull-up resistors because it features push-pull outputs (OUT1 and OUT2). Each output actively drives high to VDD or low to GND. This eliminates the need for external components and simplifies interfacing with standard CMOS inputs - unlike the open-drain TPS3780 series, which mandates pull-up resistors.

Can TPS3779CDRYT monitor voltages below 1.5 V?

TPS3779CDRYT cannot directly monitor voltages below its minimum VDD supply of 1.5 V, but it can detect rails as low as 1.2 V using an external resistor divider on SENSE1 or SENSE2. For example, a 1.2 V rail can be scaled up to 1.8 V at the SENSE pin using a 1:1.5 divider, staying within the 0–6.5 V input range and enabling accurate threshold setting.

What is the maximum operating temperature for TPS3779CDRYT?

The TPS3779CDRYT is rated for continuous operation from –40°C to +125°C junction temperature. This is specified in the Recommended Operating Conditions table and validated across all electrical parameters including VIT+ accuracy, IDD, and propagation delay. The µSON package's thermal metrics (RθJA = 306.7°C/W) support this range in typical PCB layouts without forced air or heatsinking.

How does the startup delay of 570 µs affect system reset timing?

The 570 µs startup delay in TPS3779CDRYT ensures outputs remain undefined until VDD stabilizes above VDD(min) for that duration - preventing premature or spurious reset deassertion during power ramp-up. This fixed delay is critical for synchronizing MCU reset release with stable power, and is independent of temperature or supply voltage within the 1.5 V–6.5 V range.