Texas Instruments TLV1862DGKR

Overview

TLV1862DGKR from Texas Instruments is a dual-channel, nanopower open-drain comparator with 440 nA per channel supply current, 1.8 V to 40 V supply range, and over-the-rail input capability up to 40 V above V−. It features fail-safe inputs, power-on reset, reverse battery protection, and operates from −40°C to +125°C - ideal for voltage monitoring in battery-powered smoke detectors and gas meters.

For engineers reviewing the TLV1862DGKR datasheet, TLV1862DGKR pinout, TLV1862DGKR application, or TLV1862DGKR equivalent, key selection considerations include its open-drain output for level translation, ultra-low quiescent current enabling multi-year battery life, wide common-mode input range independent of supply voltage, and guaranteed startup behavior via integrated power-on reset.

Technical Context

The TLV1862DGKR implements a fail-safe input stage with ESD clamps and snapback protection, allowing inputs to operate up to 40 V above V− regardless of V+ value. Its internal power-on reset circuit holds outputs in a known state until supply exceeds 1.5 V, preventing false triggering during brown-out conditions.

As an open-drain device, TLV1862DGKR sinks current only and requires an external pull-up to define logic-high voltage - supporting level translation across domains (e.g., 3.3 V comparator supply driving 5 V or 12 V logic). Input bias current remains below 250 pA within rail and rises to ~55 nA in over-the-rail mode.

Key Specifications

Pinout & Package

The TLV1862DGKR is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained PCB layouts while maintaining thermal performance (R_θJA = 163.1°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1862DR and TLV7032DR, TLV1862DGKR uniquely combines ultra-low power, 40 V over-the-rail inputs, and VSSOP packaging - making it irreplaceable in battery-powered safety-critical systems requiring wide-voltage sensing and minimal footprint.

Availability

TLV1862DGKR is available at Aetrix Electronics and suitable for smoke & heat detectors, gas meters, motion detectors, and servo drive position sensors requiring stable component supply across automotive-grade temperature ranges and long-lifecycle deployments.

Supply support for TLV1862DGKR 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV186x product line was designed specifically for nanopower, high-voltage housekeeping functions - enabling reliable voltage, current, and temperature monitoring in always-on, battery-operated safety and utility infrastructure equipment.

FAQ

What is the maximum input voltage the TLV1862DGKR can tolerate on its IN+ and IN− pins?

The TLV1862DGKR supports an input common-mode voltage range from −0.1 V to 40 V relative to V−, independent of the V+ supply voltage. This over-the-rail capability allows direct connection to signals exceeding the supply rails - such as 24 V sensor outputs or battery terminals - without external attenuation or clamping circuits. The absolute maximum rating is 42 V above V−, per the datasheet Absolute Maximum Ratings table.

Does the TLV1862DGKR require external pull-up resistors on its outputs?

Yes, TLV1862DGKR has open-drain outputs and requires external pull-up resistors to establish logic-high voltage levels. TI recommends limiting pull-up current to <100 µA to maintain low VOL; typical values range from 10 kΩ (for 3.3 V logic) to 1 MΩ (for high-voltage translation up to 40 V). The resistor value directly affects rise time and power consumption - lower resistance improves speed but increases static current draw.

Can the TLV1862DGKR operate with a 1.8 V supply and still meet its specified propagation delay?

Yes, TLV1862DGKR is fully specified down to 1.8 V supply. At 1.8 V, propagation delay (low-to-high) is 57 µs (typical) with 1 MΩ pull-up and 25 pF load - consistent with its nanopower design trade-off. Delay decreases as supply increases: 35 µs at 40 V under identical conditions. All electrical characteristics, including offset voltage and input bias current, are guaranteed across the full −40°C to +125°C temperature range at 1.8 V.

How does the power-on reset (POR) function in the TLV1862DGKR prevent false outputs during startup?

The TLV1862DGKR incorporates an internal POR circuit that holds both outputs in a known high-impedance or logic-low state (depending on internal design) until V+ rises above 1.5 V. This ensures no spurious transitions occur while supply ramps - critical in systems where premature comparator decisions could trigger alarms or disable safety circuits. Once V+ exceeds VPOR, normal operation begins with predictable output response to input conditions.

Is the TLV1862DGKR suitable for reverse-battery protection in portable equipment?

Yes, TLV1862DGKR includes built-in reverse battery protection: it withstands −40 V on V+ relative to V− without damage or latch-up. This allows safe operation in consumer and industrial battery-powered devices where incorrect battery insertion is possible - such as smoke detectors or handheld gas analyzers. The protection is inherent to the input stage design and requires no external components.