Texas Instruments TLV4021S5YKAR

Overview

TLV4021S5YKAR from Texas Instruments is a precision, low-power, non-inverting comparator with an internal 3.2 V fixed threshold and open-drain output, operating from 1.6 V to 5.5 V supply. It delivers 2 µA quiescent current, 54 mV hysteresis, and 2 µs propagation delay across –40°C to +125°C, enabling accurate overvoltage detection in battery management and power monitoring circuits.

For engineers reviewing the TLV4021S5YKAR datasheet, TLV4021S5YKAR pinout, TLV4021S5YKAR application, or TLV4021S5YKAR equivalent, key selection factors include its factory-trimmed 3.254 V (typ) positive-going threshold, 3.2 V (typ) negative-going threshold, rail-to-rail input capability, known startup behavior via POR circuit, and compatibility with space-constrained DSBGA packaging.

Technical Context

The TLV4021S5YKAR integrates an internal resistor divider to achieve a 3.2 V switching threshold-distinct from other TLV40x1 variants that rely on external dividers or lower reference voltages (0.2 V/0.5 V/1.2 V). Its non-inverting input topology asserts low when the input falls below VIT− (3.2 V), with open-drain output requiring an external pull-up.

It features precision hysteresis (54 mV typ at 25°C, stable over temperature and supply voltage), rail-to-rail input stage, and Power-On Reset (POR) that forces high-impedance output until supply exceeds 1.45 V-ensuring deterministic startup in power-sensitive systems.

Key Specifications

Pinout & Package

TLV4021S5YKAR is packaged in a 0.73 mm × 0.73 mm, 4-bump DSBGA (YKA package), optimized for ultra-compact portable and wearable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4041R5DBVR and TPS3808G33DBVR, the TLV4021S5YKAR uniquely combines a precise 3.2 V threshold, open-drain output, sub-µA quiescent current, and DSBGA footprint-making it optimal for compact, low-power overvoltage detection where external component count and thermal performance are critical.

Availability

TLV4021S5YKAR is available at Aetrix Electronics and suitable for lithium-ion battery protection, point-of-load voltage monitoring, and DC/DC converter fault detection requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV4021S5YKAR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV40x1 product line was designed specifically for precision, low-power voltage detection in space-constrained, battery-operated systems-emphasizing factory-trimmed thresholds, minimal IQ, and robust noise immunity.

FAQ

What is the exact switching threshold voltage of TLV4021S5YKAR?

The TLV4021S5YKAR has a factory-trimmed positive-going input threshold (VIT+) of 3.254 V (typical) and negative-going threshold (VIT−) of 3.2 V (typical) at 25°C, with guaranteed ranges of 3.221–3.287 V and 3.168–3.232 V respectively across –40°C to +125°C. These values are measured with VS = 1.8 V to 5 V and define the overvoltage detection window.

Does TLV4021S5YKAR require external resistors to set its 3.2 V threshold?

No, TLV4021S5YKAR does not require external resistors. It integrates an internal precision resistor divider to establish its 3.2 V switching threshold-unlike TLV4021R1/R2/R5 variants that rely on external networks. This eliminates component count, layout area, and trimming uncertainty.

What output configuration does TLV4021S5YKAR use, and how should it be interfaced?

TLV4021S5YKAR uses an open-drain output. It must be connected to an external pull-up resistor (typically 10 kΩ to V+ or logic rail) to generate a valid high-level signal. When the input falls below VIT− (3.2 V), OUT sinks current; otherwise, it remains high-impedance-enabling wired-OR logic and level translation.

How does the Power-On Reset (POR) function in TLV4021S5YKAR?

The TLV4021S5YKAR POR circuit holds the output in high-impedance state until V+ rises above 1.45 V. This guarantees a known startup condition-preventing false triggering during power ramp-up. Once V+ ≥ 1.45 V, the comparator output reflects the IN vs. threshold comparison with no delay beyond tON (500 µs max).

Is TLV4021S5YKAR compatible with the TLV4021R1 or TLV4021R2 pinout and footprint?

Yes, TLV4021S5YKAR shares the identical 4-bump DSBGA (YKA) package, pinout (A1=OUT, B1=V+, B2=V−, A2=IN), and PCB footprint with TLV4021R1 and TLV4021R2. However, functional differences-including fixed 3.2 V threshold versus 1.2 V or 0.2 V references-require schematic and firmware validation before substitution.