Texas Instruments TLV1824DYYR

Overview

TLV1824DYYR from Texas Instruments is a quad-channel, 40V rail-to-rail input comparator with open-drain outputs, designed for high-voltage industrial sensing and motor control interfaces. It operates from 2.4V to 40V supply, delivers 420ns typical propagation delay, draws only 5μA per channel, and features Power-On Reset (POR) to prevent false outputs during power-up. Used in factory automation feedback loops where wide common-mode range and output voltage independence are critical.

For engineers reviewing the TLV1824DYYR datasheet, TLV1824DYYR pinout, TLV1824DYYR application, or TLV1824DYYR equivalent, key selection criteria include its 40V open-drain output capability (independent of V_S), –40°C to +125°C operation, rail-to-rail input range extending 200mV beyond rails, low 150fA input bias current, and functional safety documentation support.

Technical Context

The TLV1824DYYR implements a dedicated open-drain output stage with no internal pull-up, enabling output logic levels to be pulled up to 40V regardless of the comparator's own supply voltage (2.4V–40V). Its rail-to-rail input stage uses ESD-protected differential pairs with clamping diodes referenced to V− and a soft upper clamp to V+ via 5kΩ resistance.

Power-On Reset asserts for ≤200μs when V_S crosses 1.7V, holding the output low (for push-pull) or high-impedance (for open-drain) until stable operation begins. Input offset voltage is ±0.5mV (typ), drift is ±1.2μV/°C, and PSRR is 100dB - enabling precision threshold detection across wide supply and temperature ranges.

Key Specifications

Pinout & Package

TLV1824DYYR is housed in a 14-pin SOIC package (body size 3.91mm × 8.65mm) with exposed thermal pad connected directly to V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1824DR, TLV1824DYYR offers superior thermal performance via its exposed pad and SOIC footprint, while LM339MTX/NOPB trades speed, precision, and safety features for legacy compatibility and lower unit cost - making TLV1824DYYR the preferred choice for new industrial designs requiring robustness and accuracy.

Availability

TLV1824DYYR is available at Aetrix Electronics and suitable for factory automation, motor drive protection, and automotive battery management systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLV1824DYYR 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 expertise in precision signal chain and power management solutions.

The TLV1824DYYR belongs to TI's TLV182x family of micro-power, high-voltage comparators engineered for industrial and automotive systems demanding wide supply range, low power, and functional safety compliance.

FAQ

What is the maximum allowable output pull-up voltage for TLV1824DYYR?

The TLV1824DYYR open-drain output supports pull-up voltages from 0V up to 40V relative to V−, independent of the device's own supply voltage (2.4V–40V). This allows direct interfacing with 24V PLC inputs or 36V battery monitors without external level shifters. Exceeding 40V risks permanent damage per Absolute Maximum Ratings.

Does TLV1824DYYR include Power-On Reset functionality, and how does it behave?

Yes, TLV1824DYYR includes an internal Power-On Reset (POR) circuit that activates when supply voltage crosses 1.7V, holding outputs in a known high-impedance state for ≤200μs. This prevents false triggering during power-up/down sequences in motor control and safety-critical systems. The POR is active across the full –40°C to +125°C range.

Can unused comparator inputs on TLV1824DYYR be left floating?

No - unused inputs on TLV1824DYYR must not be left floating or shorted together. Due to ultra-low input offset and high bandwidth, floating inputs cause high-frequency chatter. TI specifies tying one input to V− and the other to a stable reference ≥50mV away (e.g., V+ or a precision divider) to maintain stability and avoid false outputs.

What is the input common-mode voltage range specification for TLV1824DYYR?

The TLV1824DYYR supports a rail-to-rail input common-mode range from (V− − 0.2V) to (V+ + 0.2V) across –40°C to +125°C. This allows direct connection to unbuffered sensor outputs or current-sense amplifiers whose signals exceed the supply rails by up to 200mV - a key advantage over standard comparators with limited input ranges.

How does the thermal pad on TLV1824DYYR's SOIC package affect PCB layout?

The exposed thermal pad on TLV1824DYYR's DYY package must be soldered directly to the V− net on the PCB - not left floating or connected to ground unless V− = GND. This connection reduces R_θJA to 104.2°C/W and improves long-term reliability under sustained 40V operation. A minimum 4×4 mm copper pour connected to V− is recommended for optimal thermal performance.