Texas Instruments TLV1824QDYYRQ1

Overview

TLV1824QDYYRQ1 from Texas Instruments is an automotive-grade quad-channel comparator with open-drain outputs, rail-to-rail inputs, 2.4V–40V supply range, 5μA per channel quiescent current, and 420ns typical propagation delay. It operates in HEV/EV powertrain and body control modules where high-voltage tolerance and low-power sensing are required.

For engineers reviewing the TLV1824QDYYRQ1 datasheet, TLV1824QDYYRQ1 pinout, TLV1824QDYYRQ1 application, or TLV1824QDYYRQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 40V output pull-up capability independent of supply, Power-On Reset (POR) for glitch-free startup, and compatibility with SOT-23-14 packaging for space-constrained automotive PCBs.

Technical Context

The TLV1824QDYYRQ1 implements a rail-to-rail input stage with ESD clamps limiting differential input voltage to ±0.2V beyond V−/V+, and features an open-drain output capable of sinking up to 30mA while tolerating external pull-up voltages up to 40V-decoupled from its own 2.4V–40V supply rails. Its internal POR circuit asserts a known output state until V+ exceeds 1.7V.

Each of the four comparators includes independent IN+ and IN− inputs with 2pF differential and 8pF common-mode input capacitance, 150fA typical input bias current at 25°C, and ±0.5mV typical input offset voltage. The device supports operation across full automotive temperature range without performance derating in propagation delay or supply current.

Key Specifications

Pinout & Package

TLV1824QDYYRQ1 is packaged in a 14-pin SOT-23-THN (DYY) package with 4.20mm × 2.00mm body size and wettable flanks for automated optical inspection. The exposed thermal pad must be connected directly to V− for thermal and ESD performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1824QPWRQ1, TLV1824QDYYRQ1 saves >70% PCB area and enables ultra-compact modules; compared with LM339QDRQ1, it delivers 100× lower quiescent current, 3× faster response, and guaranteed startup behavior - essential for modern automotive domain controllers.

Availability

TLV1824QDYYRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery monitoring, body control modules, infotainment backlight control, and ADAS camera power sequencing requiring stable component supply across extended automotive lifecycles.

Supply support for TLV1824QDYYRQ1 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 deep expertise in automotive-grade signal conditioning and power management solutions.

The TLV18xx-Q1 family was designed specifically for automotive sensing and monitoring applications demanding ultra-low power, wide supply range, and functional safety readiness - targeting powertrain, chassis, and body electronics subsystems.

FAQ

What is the maximum allowable pull-up voltage on TLV1824QDYYRQ1 open-drain outputs?

The TLV1824QDYYRQ1 open-drain outputs support external pull-up voltages up to 40V, independent of the device's own supply voltage (2.4V–40V). This allows direct interfacing with higher-voltage subsystems such as 24V lighting controls or 42V mild-hybrid buses without level-shifting circuitry. Exceeding 40V risks violating absolute maximum ratings and may cause permanent damage.

Does TLV1824QDYYRQ1 include Power-On Reset (POR), and how does it behave?

Yes, TLV1824QDYYRQ1 integrates a dedicated Power-On Reset circuit that holds all four outputs in a known state (typically high-impedance or logic LOW depending on input condition) until the supply voltage V+ rises above 1.7V. This prevents false triggering during cold-cranking or brown-out events in automotive systems, ensuring deterministic startup behavior across –40°C to +125°C.

Can unused comparator channels in TLV1824QDYYRQ1 be left unconnected?

No - unused inputs must never be left floating or tied together. TI specifies that each unused comparator channel's IN+ and IN− must be biased with ≥50mV differential voltage within the rail-to-rail input range (e.g., IN+ to V+, IN− to V−). Floating or shorted inputs risk high-frequency oscillation due to internal noise amplification, potentially increasing current draw or causing system instability.

What is the thermal pad connection requirement for TLV1824QDYYRQ1 in the DYY package?

The exposed thermal pad on the TLV1824QDYYRQ1 DYY package must be soldered directly to the V− (ground) net on the PCB. This connection is mandatory for both thermal dissipation - reducing junction-to-board resistance to 79.0°C/W - and ESD robustness, as the pad forms part of the internal ESD current path to V−. Failure to connect the pad compromises AEC-Q100 reliability validation.

How does TLV1824QDYYRQ1 differ from TLV1814QDYYRQ1?

TLV1824QDYYRQ1 features open-drain outputs optimized for wired-OR logic, level translation, and high-voltage pull-up (≤40V), while TLV1814QDYYRQ1 uses push-pull outputs capable of both sinking and sourcing current. Both share identical supply range, quiescent current, propagation delay, and AEC-Q100 qualification - the output architecture is the sole functional distinction driving interface topology decisions.