Diodes Incorporated LM2901QS14-13

Overview

LM2901QS14-13 from Diodes Incorporated is a quad differential voltage comparator with AEC-Q100 Grade 1 qualification, designed for automotive systems requiring precise threshold detection across wide supply ranges (2V–36V single supply). It delivers 0.9mA typical supply current, 1mV (A-suffix) input offset voltage, and rail-to-rail common-mode input range including ground - enabling direct TTL/CMOS interfacing in battery monitoring, window comparator, and overvoltage protection circuits.

For engineers reviewing the LM2901QS14-13 datasheet, LM2901QS14-13 pinout, LM2901QS14-13 application, or LM2901QS14-13 equivalent, key selection criteria include its quad-channel architecture, SO-14 package compatibility, automotive-grade thermal robustness (−40°C to +125°C), and open-collector output capable of sinking 16mA with 100mV saturation at 4mA - critical for noise-immune level-shifting and wired-OR logic in harsh environments.

Technical Context

The LM2901QS14-13 integrates four independent comparators with PNP-input stages, delivering stable bias current (25nA typ.) and low input offset current (±5nA) across temperature. Its input common-mode range extends from ground to V_CC − 1.5V, and differential input voltage withstands up to 36V - allowing inputs to exceed supply rails without damage.

Each channel features an uncommitted NPN output transistor with ~60Ω saturation resistance, enabling flexible pull-up to any compatible voltage rail (≤36V) and wired-OR functionality. The device operates with no phase reversal and maintains gain >50 V/mV under load, supporting fast response (300ns large-signal) with minimal hysteresis dependency.

Key Specifications

Pinout & Package

LM2901QS14-13 is housed in a 14-pin SOIC (SO-14) package with industry-standard pinout and RoHS-compliant "green" mold compound. Pin assignments are fully compatible with legacy LM2901 designs and support drop-in replacement in existing PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2901DT and TLV3704IPW, the LM2901QS14-13 uniquely combines AEC-Q100 Grade 1 qualification, 2V–36V operation, and 1mV offset in SO-14 - making it the only choice for production automotive voltage supervision where reliability, temperature resilience, and regulatory compliance are mandatory.

Availability

LM2901QS14-13 is available at Aetrix Electronics and suitable for automotive battery management, ADAS sensor fusion, and powertrain control applications requiring stable component supply across extended product lifecycles.

Supply support for LM2901QS14-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.

The LM2901Q series belongs to Diodes' automotive-qualified analog portfolio, engineered specifically for robust voltage comparison in harsh-temperature, high-reliability vehicle subsystems.

FAQ

What is the maximum input voltage the LM2901QS14-13 can tolerate without damage?

The LM2901QS14-13 supports differential input voltages up to 36V and allows either input to swing up to +36V regardless of V_CC level. However, input voltage must not fall below −0.3V relative to GND (or negative supply) to avoid forward-biasing internal protection diodes. This enables safe high-side sensing in 24V systems without external clamping.

Can the outputs be directly connected together for wired-OR logic?

Yes - all four outputs are open-collector NPN structures with uncommitted emitters tied to GND. Connecting them to a shared pull-up resistor creates a true wired-OR function: the combined output goes low if any comparator asserts. No additional components or isolation diodes are needed, and this configuration is explicitly supported in the datasheet's application circuits.

Does the LM2901QS14-13 require hysteresis for stable operation with slow-moving input signals?

Yes - due to its high gain and lack of internal hysteresis, the LM2901QS14-13 can oscillate when comparing slowly varying or noisy signals near the threshold. The datasheet recommends adding 1–10mV of positive feedback (e.g., via resistor from output to non-inverting input) to ensure clean, bounce-free transitions - especially critical in battery voltage monitoring where ripple could cause false triggers.

Is the LM2901QS14-13 compatible with both 3.3V and 5V logic families?

Yes - its open-collector outputs can be pulled up to any voltage ≤36V, including 3.3V or 5V rails. When used with 3.3V pull-ups, the 100mV saturation voltage ensures solid LOW-level compatibility with 3.3V CMOS inputs (VIH ≥ 2.0V, VIL ≤ 0.8V). The device also interfaces directly with TTL due to its 16mA sink strength and guaranteed 0.4V LOW-level margin.