Texas Instruments TPS3779ADRYR

Overview

TPS3779ADRYR from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector in a 1.45 mm × 1.00 mm µSON-6 package. It monitors two independent supply rails with adjustable thresholds via external resistor dividers, features 1% threshold accuracy, 0.5% factory-set hysteresis, push-pull outputs, and operates from 1.5 V to 6.5 V across –40°C to 125°C - used for precise power-rail supervision in battery-powered microcontroller systems.

For engineers reviewing the TPS3779ADRYR datasheet, TPS3779ADRYR pinout, TPS3779ADRYR application, or TPS3779ADRYR equivalent, key selection criteria include its dual independent detection channels, ±1% VIT+ accuracy over temperature, 2 µA typical quiescent current, push-pull output compatibility with 3.3-V CMOS logic, and µSON-6 footprint for space-constrained portable designs.

Technical Context

The TPS3779ADRYR integrates two precision comparators with trimmed internal references, each driving a dedicated push-pull output (OUT1/OUT2). Thresholds are set externally via resistor dividers on SENSE1 and SENSE2, supporting detection down to 1.2 V with hysteresis options fixed at 0.5% for this variant. Input voltage range extends to 6.5 V independent of VDD.

It employs a startup delay of 570 µs after VDD crosses VDD(min), ensures glitch immunity via built-in hysteresis, and maintains stable operation under fast transients - confirmed by minimum detectable pulse duration vs. overdrive curves across –40°C to 125°C. Propagation delays are 5.5 µs (rising) and 10 µs (falling).

Key Specifications

Pinout & Package

TPS3779ADRYR is packaged in a 6-pin µSON (DRY) with 1.45 mm × 1.00 mm body size and wettable flanks for automated optical inspection. Thermal resistance RθJA is 306.7°C/W, requiring minimal PCB copper for thermal management in low-power applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3779BDRYR and TPS3780CDRYR, the TPS3779ADRYR delivers the tightest threshold stability for precision low-voltage monitoring while minimizing component count via push-pull outputs - making it optimal for space- and accuracy-critical portable and embedded designs where rail noise is controlled.

Availability

TPS3779ADRYR is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensor nodes, industrial PLC I/O modules, and SSD power-rail supervision requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3779ADRYR 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 and embedded processing technologies, with decades of expertise in precision power management ICs.

The TPS37xx family was designed specifically for high-accuracy, low-quiescent-current dual-rail supervision in battery-powered and thermally constrained systems - emphasizing small footprint, wide temperature operation, and configurable detection thresholds.

FAQ

What is the factory-set hysteresis value for TPS3779ADRYR?

The TPS3779ADRYR has a factory-set hysteresis of 0.5%, as designated by the "A" suffix in its part number per TI's TPS37xx device comparison table. This value is laser-trimmed and fixed - not adjustable in-circuit - and provides optimal noise immunity for clean, low-voltage rails like 1.2-V or 1.8-V supplies monitored in the TPS3779ADRYR application.

Does TPS3779ADRYR require external pull-up resistors on its outputs?

No, the TPS3779ADRYR 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, eliminating the need for external components and reducing board area - a key advantage over open-drain alternatives like the TPS3780 series, which do require pull-ups for proper logic-level translation in the TPS3779ADRYR design.

Can TPS3779ADRYR monitor voltages higher than its VDD supply?

Yes, the TPS3779ADRYR SENSE1 and SENSE2 inputs accept voltages up to 6.5 V regardless of VDD level, enabling direct monitoring of higher rails (e.g., 5-V or 3.3-V supplies) even when powered from a lower VDD such as 1.8 V. This capability is explicitly specified in the Electrical Characteristics table and allows flexible rail supervision without level-shifting circuitry in the TPS3779ADRYR implementation.

What is the minimum detectable voltage threshold for TPS3779ADRYR?

The TPS3779ADRYR supports adjustable detection thresholds down to 1.2 V using external resistor dividers on SENSE1 and SENSE2. The internal reference and comparator architecture allow precise scaling - for example, a 1.2-V rail can be monitored with a 2:1 divider yielding 0.6-V input to SENSE, well within the device's 0–6.5-V input range and compatible with the TPS3779ADRYR's ±1% VIT+ accuracy specification.

How does the 570-µs startup delay affect system reset timing in TPS3779ADRYR?

The 570-µs startup delay in the TPS3779ADRYR ensures outputs remain invalid until VDD stabilizes above VDD(min), preventing premature reset release during power ramp-up. This fixed delay - measured from VDD crossing VDD(min) - guarantees that OUT1 and OUT2 reflect true SENSE states only after internal circuitry is fully operational, which is critical for reliable power-on reset sequencing in the TPS3779ADRYR application.