Texas Instruments TLV3491AIDBVRG4

Overview

TLV3491AIDBVRG4 from Texas Instruments is a nanopower, rail-to-rail input/output comparator in 5-pin SOT-23 package, operating from 1.8 V to 5.5 V with 0.8 µA typical supply current, 6 µs propagation delay (100 mV overdrive), and push-pull CMOS output - used for ultra-low-power voltage monitoring in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the TLV3491AIDBVRG4 datasheet, TLV3491AIDBVRG4 pinout, TLV3491AIDBVRG4 application, or TLV3491AIDBVRG4 equivalent, key selection criteria include quiescent current vs. speed trade-off, input common-mode range extending 200 mV beyond rails, push-pull output drive capability without external pull-up, and compatibility with single-cell Li-ion or alkaline systems.

Technical Context

The TLV3491AIDBVRG4 implements a fully differential input stage with ESD-protected inputs rated ±3000 V HBM, enabling robust operation in noisy portable environments. Its push-pull output eliminates shoot-through current and supports direct interfacing with CMOS logic without pull-up resistors.

It operates across –40°C to +125°C with input offset voltage of ±15 mV max and temperature drift of ±12 µV/°C, while maintaining rail-to-rail input common-mode range from (V–) – 0.2 V to (V+) + 0.2 V - critical for accurate threshold detection near supply rails in low-voltage systems.

Key Specifications

Pinout & Package

TLV3491AIDBVRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.45 mm, optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower comparator applications.

Compared with TLV3491AIDBVRG4, TLV3401DBVR trades push-pull simplicity for lower IQ and bus flexibility, while LMV331M5X/NOPB sacrifices nanopower efficiency for nanosecond-scale response - making TLV3491AIDBVRG4 optimal for battery longevity in space-constrained, low-voltage sensing nodes.

Availability

TLV3491AIDBVRG4 is available at Aetrix Electronics and suitable for portable medical equipment, wireless security systems, handheld instruments, and ultra-low-power IoT nodes requiring stable component supply across long production lifecycles.

Supply support for TLV3491AIDBVRG4 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 connectivity technologies, with decades of expertise in precision signal chain and low-power design.

The TLV349x family was developed specifically for ultra-low-power, rail-to-rail sensing in battery-operated portable and medical devices - emphasizing nanopower operation, wide supply range, and robust input protection.

FAQ

What is the maximum operating temperature for TLV3491AIDBVRG4?

The TLV3491AIDBVRG4 is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range supports deployment in automotive cabin modules, industrial sensor housings, and medical wearable devices exposed to environmental thermal cycling. Thermal resistance (R_θJA) is 237.8°C/W for the DBV package, requiring attention to PCB copper area and airflow in high-temperature enclosures. TLV3491AIDBVRG4 maintains full electrical performance across this range per TI SBOS262E specifications.

Does TLV3491AIDBVRG4 require external hysteresis for noise immunity?

Yes - TLV3491AIDBVRG4 has a typical input offset voltage of ±15 mV, meaning it lacks inherent noise immunity within that band. For noisy input signals (e.g., PIR sensor outputs or unshielded battery traces), external hysteresis must be added via positive feedback to the +IN pin. A standard resistor divider (e.g., 560 kΩ and 39 kΩ) sets ~380 mV hysteresis, preventing multiple output toggles near the switching threshold. TLV3491AIDBVRG4 does not integrate internal hysteresis.

Can TLV3491AIDBVRG4 operate from a single 1.8-V supply?

Yes - TLV3491AIDBVRG4 is fully specified for operation from 1.8 V to 5.5 V single supply (or ±0.9 V to ±2.75 V dual supply). At 1.8 V, it delivers 6 µs propagation delay, rail-to-rail input range from –0.2 V to +2.0 V, and 0.85 µA typical quiescent current. Its push-pull output swings within 200 mV of both rails, enabling reliable interfacing with 1.8-V logic. TLV3491AIDBVRG4 is explicitly designed for single-cell Li-ion and two-cell alkaline systems.

What is the purpose of the NC pin on TLV3491AIDBVRG4?

TLV3491AIDBVRG4 has no NC (no-connect) pin - all five pins in the SOT-23 (DBV) package are functional: OUT (pin 1), V– (pin 2), +IN (pin 3), –IN (pin 4), and V+ (pin 5). The NC designation appears only in the SOIC-8 variant (pins 1, 5, and 8), which is not applicable to TLV3491AIDBVRG4. Misidentifying pin 2 as NC would cause incorrect grounding and device failure. TLV3491AIDBVRG4 requires proper connection of V– to system ground or negative rail.

How does TLV3491AIDBVRG4 handle input voltages exceeding the supply rails?

TLV3491AIDBVRG4 features ESD diodes that conduct when input voltages exceed V+ or fall below V– by more than ~500 mV. It tolerates momentary overvoltage up to ±10 mA input current - achievable by adding a series resistor (e.g., 10 kΩ) to limit current. The absolute maximum rating allows input signals from (V–) – 0.5 V to (V+) + 0.5 V. TLV3491AIDBVRG4's input common-mode range extends 200 mV beyond rails under normal operation, but sustained overvoltage requires external clamping or current limiting per TI SBOS262E guidelines.