Texas Instruments TLV4021R2YKAR

Overview

TLV4021R2YKAR from Texas Instruments is a precision, low-power, open-drain comparator with a factory-trimmed 0.2 V internal reference, 2 µA quiescent current, 360 ns propagation delay, and operation from 1.6 V to 5.5 V supply. It delivers stable voltage monitoring in space-constrained, battery-powered systems such as lithium-ion protection circuits and point-of-load regulators.

For engineers reviewing the TLV4021R2YKAR datasheet, TLV4021R2YKAR pinout, TLV4021R2YKAR application, or TLV4021R2YKAR equivalent, this page provides verified package mapping (DSBGA-4), input configuration (non-inverting), threshold accuracy (±0.5% at 25°C), hysteresis (20 mV), and thermal performance (R_θJA = 205.5°C/W) - all confirmed for the YKA package and R2 reference variant.

Technical Context

The TLV4021R2YKAR integrates a rail-to-rail input stage with a fixed 0.2 V precision reference and non-inverting input topology. Its open-drain output supports flexible pull-up configurations and enables wired-OR logic in system-level fault detection.

It features a Power-on Reset (POR) circuit that forces high-impedance output until supply reaches ≥1.45 V, ensuring known startup behavior. Input hysteresis of 20 mV rejects noise on slow-moving signals without external components.

Key Specifications

Pinout & Package

TLV4021R2YKAR is packaged in a 0.73 mm × 0.73 mm, 4-bump DSBGA (YKA) - optimized for ultra-compact PCB layouts in wearables and IoT edge nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4021R2DBVR, TLV4021R2YKAR saves >90% board area and suits high-density designs; compared with TLV4041R2YKAR, it enables shared fault-bus signaling but requires a pull-up resistor - choice depends on layout constraints and system-level signal routing.

Availability

TLV4021R2YKAR is available at Aetrix Electronics and suitable for lithium-ion battery management, point-of-load regulation, and portable medical diagnostics requiring stable component supply across automotive, industrial, and consumer product lifecycles.

Supply support for TLV4021R2YKAR 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 delivering analog, embedded processing, and connectivity solutions with broad industrial and automotive qualification.

TLV4021R2YKAR belongs to the TLV40x1 family of precision comparators designed specifically for ultra-low-power, space-constrained voltage monitoring in battery-powered and safety-critical subsystems.

FAQ

What is the exact reference voltage and accuracy of TLV4021R2YKAR?

The TLV4021R2YKAR features a factory-trimmed internal reference voltage of 0.2 V with ±0.5% accuracy at 25°C and ±1% accuracy over the full –40°C to +125°C operating range. This is confirmed in Table 6-5 of the official datasheet (SNVSB04C) and applies specifically to the R2 variant in the YKA package.

Does TLV4021R2YKAR require external components to function as a voltage detector?

No - TLV4021R2YKAR operates as a complete voltage detector with no external components required. Its integrated 0.2 V reference, non-inverting input, and open-drain output allow direct connection of the sensed voltage to the IN pin (with appropriate scaling if above 0.2 V). Only an external pull-up resistor is needed on the OUT pin for logic-level translation.

What is the power-on behavior of TLV4021R2YKAR?

TLV4021R2YKAR incorporates a Power-on Reset (POR) circuit that holds the OUT pin in high-impedance state until the supply voltage V+ reaches ≥1.45 V. This ensures predictable startup and prevents false triggering during power ramp-up - a key requirement in battery-powered systems where voltage rise is slow and uncontrolled.

Can TLV4021R2YKAR be used for overvoltage detection?

Yes - TLV4021R2YKAR supports overvoltage detection when used with an external resistor divider. For example, applying a 10:1 divider to a 3.3 V rail yields 0.33 V at IN, exceeding the 0.2 V threshold and asserting the output. The 10 pA input bias current ensures minimal divider error, and 20 mV hysteresis prevents chatter near the trip point.

Is TLV4021R2YKAR pin-compatible with other TLV40x1 variants in the YKA package?

Yes - all TLV40x1 devices in the YKA (DSBGA-4) package share identical pinout: A1=OUT, B1=V+, B2=V−, A2=IN. TLV4021R2YKAR is functionally and physically compatible with TLV4021R1YKAR, TLV4031R2YKAR, and TLV4021S5XYKAR at the board level, though reference voltage, input polarity, and output type differ per variant.