Diodes Incorporated LM2903AS-13

Overview

LM2903AS-13 from Diodes Incorporated is a dual precision voltage comparator with A-grade 1 mV typical input offset voltage, rail-to-rail common-mode input range including ground, and open-collector outputs compatible with TTL/CMOS/MOS logic. It operates from single supplies (2 V to 36 V) or split supplies (±1.0 V to ±18 V), draws only 0.6 mA supply current at 30 V, and is packaged in SO-8 for industrial sensor interface and power supply monitoring applications.

For engineers reviewing the LM2903AS-13 datasheet, LM2903AS-13 pinout, LM2903AS-13 application, or LM2903AS-13 equivalent, key selection criteria include input offset voltage accuracy, output sink capability (16 mA), wide supply voltage tolerance, low bias current (25 nA), and compatibility with legacy logic families without level-shifting.

Technical Context

The LM2903AS-13 integrates two independent comparators with PNP differential input stages enabling common-mode voltage down to ground and differential input voltage up to 36 V-exceeding V_CC. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up voltages independent of V_CC.

Designed for direct TTL/CMOS interfacing, it features hysteresis-ready inputs and stable operation without oscillation when layout guidelines (e.g., <10 kΩ input resistors, optional positive feedback) are followed. Input bias current flows *out* of the device, minimizing source loading effects across temperature and supply voltage.

Key Specifications

Pinout & Package

LM2903AS-13 is housed in an industry-standard SO-8 package (4.9 mm × 6.0 mm, 1.27 mm pitch) with green mold compound, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2903AS-13, LM2903DR2G trades offset accuracy for broader availability and lower unit cost, while TLV3702IDR delivers microamp-level power savings at the expense of supply voltage headroom and output drive strength-making LM2903AS-13 optimal for 12–24 V industrial sensing where precision and robustness are prioritized.

Availability

LM2903AS-13 is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and power supply supervision requiring stable component supply across extended temperature ranges (−40°C to +125°C) and long product lifecycles.

Supply support for LM2903AS-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 industrial, computing, consumer, and communications markets.

LM2903AS-13 belongs to the LM290x family of precision comparators designed specifically for robust, low-cost voltage threshold detection in harsh environments-emphasizing wide supply range, ground-sensing capability, and logic interoperability.

FAQ

Can LM2903AS-13 operate with a 3.3 V supply?

Yes. LM2903AS-13 functions across 2 V to 36 V single supply, including 3.3 V. At 3.3 V, its input common-mode range spans 0 V to 1.8 V, and output saturation voltage remains ≤400 mV at 4 mA sink current-ensuring reliable low-state recognition by 3.3 V logic families.

Does LM2903AS-13 require external hysteresis?

Hysteresis is not mandatory but strongly recommended for noisy input signals. The device lacks internal hysteresis; adding 1–10 mV positive feedback via resistor networks prevents output oscillation during slow input transitions, especially in high-impedance sensor interfaces.

What is the maximum sink current per output?

Each output can continuously sink up to 16 mA (min) at V_CC = 5 V and T_A = +25°C. At higher temperatures or supply voltages, derating applies-maximum junction temperature (150°C) and thermal resistance (θ_JA = 110°C/W for SO-8) limit sustained current to ~12 mA at +85°C ambient.

Is LM2903AS-13 pin-compatible with LM2903DT-13?

No. LM2903AS-13 uses SO-8 packaging with standard LM2903 pinout (1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, V_CC). LM2903DT-13 is a TSSOP-8 variant with identical pin function mapping but different mechanical dimensions and thermal characteristics-requiring PCB footprint revision.