Diodes Incorporated LM2903QM8-13

Overview

LM2903QM8-13 from Diodes Incorporated is an automotive-grade dual differential voltage comparator with AEC-Q100 Grade 1 qualification, 2V–36V single-supply operation, 2mV typical input offset voltage (non-A version), 0.6mA supply current at 5V, and open-collector outputs compatible with TTL/CMOS logic-used in battery monitoring, overvoltage protection, and window comparator circuits in engine control units.

For engineers reviewing the LM2903QM8-13 datasheet, LM2903QM8-13 pinout, LM2903QM8-13 application, or LM2903QM8-13 equivalent, key selection criteria include input common-mode range including ground, output sink capability up to 16mA, low saturation voltage (200mV @ 4mA), and SO-8 package compatibility with automotive thermal and reliability requirements.

Technical Context

The LM2903QM8-13 implements two independent PNP-input comparators with rail-to-rail input common-mode range (0 V to V_CC−1.5 V) and differential input voltage tolerance up to ±36 V. Its uncommitted NPN output transistors enable wired-OR configurations and flexible pull-up voltage selection independent of V_CC.

Designed for automotive environments, it features AEC-Q100 Grade 1 qualification (−40°C to +125°C ambient), 500 V HBM ESD rating, and stable performance across 2V–36V supply range with supply-current independence from V_CC magnitude-enabling direct interface with 12V/24V vehicle electrical systems and microcontroller I/Os.

Key Specifications

Pinout & Package

LM2903QM8-13 is housed in an industry-standard SO-8 package (3.9mm × 4.9mm, 1.27mm pitch), RoHS-compliant, halogen-free, and qualified for automotive reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2903DR2G, LM2903QM8-13 adds mandatory AEC-Q100 Grade 1 validation and PPAP support for Tier 1 production; versus TLV3702IDR, it trades nanowatt quiescent current for 36V operation and proven under-hood reliability-making it irreplaceable in core powertrain sensing.

Availability

LM2903QM8-13 is available at Aetrix Electronics and suitable for automotive battery management, engine control unit (ECU) signal conditioning, and body electronics requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LM2903QM8-13 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 devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q100 standards.

The LM2903Q series belongs to Diodes' automotive-qualified precision comparator product line, engineered specifically for robust voltage comparison in harsh-temperature, high-reliability vehicle subsystems-including powertrain, chassis, and electrification controls.

FAQ

What is the maximum allowable differential input voltage for LM2903QM8-13?

The absolute maximum differential input voltage is ±36 V, as specified in the datasheet's Absolute Maximum Ratings table. This rating holds regardless of supply voltage and enables direct interface with unregulated automotive battery rails and transient-prone sensor lines without external attenuation or clamping.

Can LM2903QM8-13 operate with a single 3.3V supply?

Yes-its minimum single-supply voltage is 2 V, making it fully functional at 3.3 V. At this voltage, supply current remains ~0.6 mA, input offset voltage stays within 2 mV typical, and output saturation voltage is ≤200 mV at 4 mA sink, ensuring reliable interfacing with 3.3 V microcontrollers and logic families.

Does LM2903QM8-13 require external hysteresis for stable operation?

Hysteresis is recommended when input signals have slow edges or high noise susceptibility, such as in analog sensor monitoring. The datasheet notes that stray capacitance can cause oscillation during transitions; adding 1–10 mV of positive feedback eliminates this. For clean, fast-rising signals (e.g., digital encoders), hysteresis is optional.

Is the SO-8 package of LM2903QM8-13 compatible with standard reflow profiles?

Yes-the SO-8 package is qualified for standard lead-free reflow per J-STD-020, with peak temperature up to +260°C for 10 seconds. Its green mold compound and halogen-free construction meet automotive solderability and environmental compliance requirements without special process adjustments.