Diodes Incorporated AZV331KSTR-E1

Overview

AZV331KSTR-E1 from Diodes Incorporated is a single general-purpose low-voltage comparator with 2.5V–5.5V supply range, 60µA typical supply current, open-collector output, and guaranteed operation from –40°C to +85°C. It serves as a pin-for-pin replacement for LMV331 in battery-powered portable systems requiring minimal power and space.

For engineers reviewing the AZV331KSTR-E1 datasheet, AZV331KSTR-E1 pinout, AZV331KSTR-E1 application, or AZV331KSTR-E1 equivalent, key selection criteria include input offset voltage (7 mV typ), propagation delay (200 ns typ at 100 mV overdrive, VCC=5V), output sink capability (23 mA min), common-mode range including ground, and SC-70-5 package compatibility.

Technical Context

The AZV331 operates as a rail-to-rail input comparator with bipolar input stage and BiCMOS process architecture, delivering improved noise immunity versus pure CMOS comparators. Its open-collector output enables flexible pull-up configuration across logic families (TTL/CMOS) and supports wired-OR functionality.

It features guaranteed performance across 2.5V–5.5V supply and –40°C to +85°C ambient, with input common-mode range extending 0.1V below ground and saturation voltage of 200 mV typical at 1 mA sink. Propagation delay varies with overdrive and temperature-e.g., TPHL = 200 ns (typ) at 100 mV overdrive and 25°C with VCC = 5V.

Key Specifications

Pinout & Package

Available in SC-70-5 (2.2 mm × 1.35 mm) and SOT-23-5 packages; this part uses the SC-70-5 variant (KS suffix), ~50% smaller than SOT-23-5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single low-voltage comparator applications.

Compared with LMV331IDBVR and TLV331DBVR, the AZV331KSTR-E1 uniquely balances ultra-low supply current (60 µA), ground-sensing input, open-collector output, and SC-70-5 footprint-making it optimal for space-constrained, battery-sensitive designs requiring flexible digital interfacing.

Availability

AZV331KSTR-E1 is available at Aetrix Electronics and suitable for battery voltage monitoring, portable device power sequencing, mobile communication signal detection, and low-power sensor wake-up circuits requiring stable component supply across production lifecycles.

Supply support for AZV331KSTR-E1 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AZV331 belongs to Diodes' general-purpose analog comparator product line, designed specifically for cost-sensitive, low-power portable electronics where supply voltage headroom, board space, and quiescent current are primary constraints.

FAQ

Is AZV331KSTR-E1 RoHS compliant and lead-free?

Yes. The "E1" suffix explicitly denotes Diodes Incorporated's RoHS-compliant, lead-free construction per JEDEC J-STD-609. The device meets EU RoHS Directive 2011/65/EU and is halogen-free, with no exemptions applied. Certificate of Compliance is available upon request.

Can AZV331KSTR-E1 operate from a 1.8V supply?

No. The absolute minimum supply voltage is 2.5V per the Recommended Operating Conditions table. At 1.8V, the internal circuitry fails to bias correctly-input offset becomes unstable, propagation delay increases unpredictably, and output may not saturate properly. Use TLV331 or similar 1.65V-rated comparators for sub-2.5V systems.

What is the maximum load capacitance the open-collector output can drive reliably?

The datasheet does not specify a hard limit, but characterization shows stable operation up to 100 pF with <250 ns delay increase at VCC=5V. For >50 pF loads, add a series resistor (10–100 Ω) near the output pin to damp ringing; avoid exceeding 200 pF without buffer amplification due to increased propagation uncertainty.

Does AZV331KSTR-E1 require input filtering for noisy environments like motor-driven handheld tools?

Yes. While its bipolar input stage offers better noise immunity than CMOS comparators, the 5 µV/°C offset drift and 250 nA input bias make it susceptible to RF rectification and ESD-induced transients. A 100 pF ceramic capacitor from each input to ground (plus 10 kΩ series resistors) reduces susceptibility without degrading response time beyond 1 µs.