Texas Instruments TLV4082QDBVRQ1

Overview

TLV4082QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-channel, open-drain automotive comparator with integrated 1.194 V rising threshold (±1%), 60 mV precision hysteresis, 2 µA typical quiescent current, and 1.5 V to 5.5 V supply range - used for rail monitoring and reset generation in eCall systems and instrument clusters.

For engineers reviewing the TLV4082QDBVRQ1 datasheet, TLV4082QDBVRQ1 pinout, TLV4082QDBVRQ1 application, or TLV4082QDBVRQ1 equivalent, key selection considerations include open-drain output compatibility with 5.5 V pull-up independent of V+, ±1% threshold accuracy over –40°C to +125°C, and glitch-immune hysteresis enabling stable voltage monitoring in noisy automotive environments.

Technical Context

The TLV4082QDBVRQ1 implements two independent comparators with fixed internal reference thresholds (VIT+ = 1.194 V, VIT– = 1.134 V) and built-in 60 mV hysteresis per channel. Each INx input accepts 0 V to 5.5 V signals regardless of V+ supply level, supporting fault-tolerant monitoring during power ramp-up or brownout.

Its open-drain outputs require external pull-up resistors and support logic-level translation up to 5.5 V - enabling direct interface with higher-voltage controllers or wired-OR configurations. Propagation delay is 5.5 µs (rising) and 10 µs (falling) at 25°C with 3.3 V supply, and startup delay is 570 µs after V+ crosses 1.5 V.

Key Specifications

Pinout & Package

SOT-23 (DBV) package, 6-pin, 2.90 mm × 1.60 mm body size, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4062QDBVRQ1, TLV4082QDBVRQ1 trades push-pull simplicity for open-drain flexibility in mixed-voltage systems; versus TLV4042QDBVRQ1, it delivers plug-and-play accuracy and noise immunity at the cost of 6× higher quiescent current - making it optimal for production automotive voltage supervisors where reliability and layout efficiency are prioritized.

Availability

TLV4082QDBVRQ1 is available at Aetrix Electronics and suitable for emergency call (eCall) systems, instrument cluster power management, on-board charger control, and automotive head unit voltage guarding requiring stable component supply across extended temperature and automotive lifecycle requirements.

Supply support for TLV4082QDBVRQ1 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 automotive qualification expertise and broad portfolio of AEC-Q100-compliant components.

The TLV40xx-Q1 family was designed specifically for automotive voltage monitoring applications - delivering precision, low power, and robustness in compact SOT-23 packages for space-constrained telematics, infotainment, and powertrain subsystems.

FAQ

What is the maximum input voltage allowed on IN1 and IN2 pins of the TLV4082QDBVRQ1?

The TLV4082QDBVRQ1 supports IN1 and IN2 input voltages from –0.3 V to 7 V, independent of V+ supply level. This fault-tolerant specification allows safe operation during reverse-battery events or transient overvoltage conditions common in automotive 12 V systems, and enables monitoring of rails up to 5.5 V even when V+ is unpowered or at 1.5 V.

Does the TLV4082QDBVRQ1 require external hysteresis components?

No, the TLV4082QDBVRQ1 integrates 60 mV of precision hysteresis internally between VIT+ (1.194 V) and VIT– (1.134 V). This eliminates the need for external positive feedback resistors, simplifies PCB layout, improves noise immunity in electrically noisy automotive environments, and ensures consistent hysteresis performance across temperature and process variation - all without impacting the 2 µA quiescent current.

Can the TLV4082QDBVRQ1 outputs drive a 5 V logic input while operating from a 3.3 V supply?

Yes - the TLV4082QDBVRQ1 features open-drain outputs that support pull-up to 5.5 V independent of V+. When V+ = 3.3 V, OUT1 and OUT2 can be pulled up to 5 V using external resistors (e.g., 4.7 kΩ), enabling direct interface with 5 V microcontrollers or FPGAs without level shifters - a key advantage over push-pull alternatives like TLV4062QDBVRQ1.

What is the startup behavior of the TLV4082QDBVRQ1 after power-on?

The TLV4082QDBVRQ1 exhibits a 570 µs startup delay after V+ crosses the 1.5 V minimum operating threshold. During this period, outputs remain undefined and must not be relied upon for system reset or enable functions. This delay ensures internal references stabilize before valid comparisons begin - critical for deterministic behavior in automotive power-up sequences where rail ramp rates vary.

How does the TLV4082QDBVRQ1 achieve ±1% threshold accuracy over temperature?

The TLV4082QDBVRQ1 uses laser-trimmed internal reference circuitry and matched transistor pairs to maintain VIT+ = 1.194 V and VIT– = 1.134 V with ±1% deviation across –40°C to +125°C. This is verified per AEC-Q100 test conditions and reflected in production test data (Figures 6-5 and 6-6), ensuring consistent overvoltage trip points in engine bay or dashboard environments without software calibration.