Texas Instruments TPS3780ADRYR

Overview

TPS3780ADRYR from Texas Instruments is a dual-channel, open-drain voltage detector IC designed for precision rail monitoring in low-power systems. It features 1% threshold accuracy (VIT+ = 1.182 V), 1% hysteresis, 2 µA typical quiescent current, and operates across 1.5 V to 6.5 V supply and –40°C to 125°C temperature range. It is used for independent reset generation on two power rails in portable medical devices and solid-state drives.

For engineers reviewing the TPS3780ADRYR datasheet, TPS3780ADRYR pinout, TPS3780ADRYR application, or TPS3780ADRYR equivalent, this page delivers verified electrical specs, thermal behavior at temperature extremes, open-drain output interface constraints, and validated resistor-divider design guidance for adjustable detection thresholds down to 1.2 V.

Technical Context

The TPS3780ADRYR implements two independent high-accuracy comparators with internal reference trimming - each with programmable hysteresis (1% in this variant) and input thresholds stable over temperature (±0.4% deviation from –40°C to 125°C). Its SENSE1/SENSE2 inputs accept voltages up to 6.5 V regardless of VDD level, enabling flexible rail monitoring across mixed-voltage domains.

Both outputs are open-drain with 6.5 V absolute maximum pull-up voltage rating, independent of VDD. Propagation delays are tightly specified: tPD(r) = 5.5 µs (rising), tPD(f) = 10 µs (falling), and startup delay tSD = 570 µs after VDD crosses VDD(min), ensuring deterministic reset timing during power sequencing.

Key Specifications

Pinout & Package

TPS3780ADRYR is packaged 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 reflects its compact footprint and low-power operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3780BDRYR and TPS3779ADBV, the TPS3780ADRYR uniquely balances 1% threshold precision, open-drain flexibility for multi-rail systems, and µSON footprint - making it optimal for space-constrained, mixed-voltage embedded designs requiring certified accuracy.

Availability

TPS3780ADRYR is available at Aetrix Electronics and suitable for portable medical devices, solid-state drives, and building automation sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3780ADRYR 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability components.

The TPS37xx family was engineered specifically for precision dual-rail voltage supervision in battery-constrained and thermally demanding applications - emphasizing low IDD, wide VDD range, and factory-trimmed threshold stability.

FAQ

What is the exact VIT+ threshold voltage of the TPS3780ADRYR?

The TPS3780ADRYR has a factory-set positive-going input threshold (VIT+) of 1.182 V with ±1% accuracy over –40°C to 125°C. This value is guaranteed per the Electrical Characteristics table in the SBVS250 datasheet and applies to both SENSE1 and SENSE2 inputs under recommended operating conditions (1.5 V ≤ VDD ≤ 6.5 V).

Does the TPS3780ADRYR require external pull-up resistors on OUT1 and OUT2?

Yes, the TPS3780ADRYR uses open-drain outputs, so external pull-up resistors are mandatory on both OUT1 and OUT2 to establish a defined logic-high state. The datasheet specifies RPU between 1.5 kΩ and 10 MΩ; typical values range from 10 kΩ to 100 kΩ depending on rise time and bus capacitance requirements.

Can the TPS3780ADRYR monitor voltages higher than its VDD supply?

Yes, the SENSE1 and SENSE2 inputs of the TPS3780ADRYR accept voltages from 0 V to 6.5 V regardless of VDD level - enabling direct monitoring of 5 V or 3.3 V rails even when VDD is powered from a 1.8 V source. This is explicitly confirmed in Section 7.3 (Recommended Operating Conditions) and Figure 20's functional block diagram.

What is the startup behavior of the TPS3780ADRYR during power-on?

Upon power application, the TPS3780ADRYR enters a 570 µs startup delay (tSD) after VDD crosses VDD(min). During this period, outputs remain undefined. After tSD expires, OUT1 and OUT2 respond to SENSE1/SENSE2 states relative to VIT+ and VIT–. This behavior prevents false resets during supply ramp-up and is detailed in Section 8.4.1 and Figure 15.

How does hysteresis work in the TPS3780ADRYR, and what is its value?

The TPS3780ADRYR implements fixed 1% hysteresis between VIT+ and VIT– thresholds. For VIT+ = 1.182 V, VIT– = 1.170 V at 25°C. This hysteresis rejects brief voltage glitches and ensures stable output transitions - a key feature documented in Section 3 (Description) and Table 5 (Device Comparison Table) of the SBVS250 datasheet.