Texas Instruments TPS3779DDBVR

Overview

TPS3779DDBVR from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector IC with push-pull outputs, operating from 1.5 V to 6.5 V supply and supporting –40°C to 125°C ambient. It features 1% factory-set hysteresis, ±1% VIT+ threshold accuracy over temperature, and 2 µA typical quiescent current. Used for independent monitoring of two power rails in microcontroller reset supervision and power sequencing.

For engineers reviewing the TPS3779DDBVR datasheet, TPS3779DDBVR pinout, TPS3779DDBVR application, or TPS3779DDBVR equivalent, this page delivers verified electrical specs, package mapping, functional pin roles, real-world use cases, and validated alternative options - all confirmed against TI's SBVS250 datasheet and official product documentation.

Technical Context

The TPS3779DDBVR implements two independent precision comparators with internal reference and fixed 1% hysteresis (VHYS = 1% × VIT+), enabling stable detection of undervoltage events on SENSE1 and SENSE2 without external components. Each channel asserts its respective push-pull output (OUT1/OUT2) low when input falls below VIT– (e.g., 1.182 V at nominal VIT+ = 1.194 V), and deasserts high when input rises above VIT+.

It operates across full industrial temperature range with <±0.4% VIT+ deviation from –40°C to +125°C, supports adjustable detection thresholds down to 1.2 V via external resistor dividers, and includes 570 µs startup delay (tSD) after VDD crosses VDD(min) to ensure reliable power-on reset behavior.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm body), moisture-sensitive level 1, RoHS-compliant, with exposed pad not connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3779CDBVR and TPS3780DDBVR, the TPS3779DDBVR provides optimal balance of noise immunity (1% hysteresis), board-space efficiency (no pull-ups), and compatibility with standard 3.3 V logic families - making it ideal for compact, cost-sensitive embedded designs requiring precise dual-rail supervision.

Availability

TPS3779DDBVR is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, and battery-powered system monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS3779DDBVR 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 analog ICs and industrial-grade reliability.

The TPS37xx family was designed specifically for high-accuracy, low-power voltage monitoring in space-constrained and energy-sensitive applications - including portable medical devices, industrial controllers, and computing platforms.

FAQ

What is the factory-set hysteresis value for TPS3779DDBVR?

The TPS3779DDBVR has a factory-set hysteresis of exactly 1%, corresponding to VHYS = 1% × VIT+. This is confirmed in TI's SBVS250 datasheet Device Comparison Table and Electrical Characteristics section, where TPS3779D is explicitly designated as the 1% hysteresis variant. No external components are required to achieve this specification.

Does TPS3779DDBVR require external pull-up resistors on its outputs?

No, TPS3779DDBVR does not require external pull-up resistors because it features push-pull outputs (OUT1 and OUT2). As stated in the Pin Functions table and Feature Description section of the SBVS250 datasheet, each output actively drives high (to VDD) and low (to GND), eliminating the need for external biasing components and reducing BOM count.

What is the minimum detectable voltage threshold achievable with TPS3779DDBVR?

The TPS3779DDBVR supports adjustable detection thresholds down to 1.2 V, as specified in the Features section of SBVS250. This is achieved using external resistor dividers on SENSE1 and SENSE2, with the internal VIT+ = 1.194 V serving as the reference point - enabling accurate monitoring of sub-1.8 V rails like 1.2 V core supplies.

How does TPS3779DDBVR behave during power-up?

Upon power-up, TPS3779DDBVR enforces a 570 µs startup delay (tSD) after VDD crosses VDD(min), as defined in Section 7.6 of SBVS250. During this period, outputs remain in a known inactive state, ensuring reliable reset assertion only after internal circuitry stabilizes - preventing spurious resets during supply ramp-up.

Can TPS3779DDBVR monitor voltages higher than its VDD supply?

Yes, TPS3779DDBVR can monitor input voltages up to 6.5 V on SENSE1 and SENSE2 regardless of VDD level, as confirmed in Section 7.3 (Recommended Operating Conditions) and Section 8.3.1 of SBVS250. This allows direct sensing of higher-voltage rails (e.g., 5 V) while powered from a lower VDD (e.g., 3.3 V), simplifying multi-rail supervision.