Diodes Incorporated LM2903ATH-13

Overview

LM2903ATH-13 from Diodes Incorporated is a dual precision voltage comparator with open-collector outputs, designed for single-supply operation from 2V to 36V or split supplies (±1.0V to ±18V). It features 2mV typical input offset voltage (non-A grade), 25nA input bias current, 0.6mA supply current per channel at 30V, and rail-to-rail common-mode input range including ground-used in overvoltage detection, zero-crossing sensing, and level-shifting interfaces.

For engineers reviewing the LM2903ATH-13 datasheet, LM2903ATH-13 pinout, LM2903ATH-13 application, or LM2903ATH-13 equivalent, key selection criteria include input offset voltage tolerance, output sink capability (16mA max), wide supply flexibility, TTL/CMOS compatibility, and TSSOP-8 thermal performance (θJA = 185°C/W).

Technical Context

The LM2903ATH-13 implements two independent PNP-input comparators with uncommitted NPN output transistors, enabling wired-OR configurations and flexible pull-up voltage selection independent of VCC. Its input stage operates down to ground and tolerates differential inputs up to 36V, even beyond supply rails.

It delivers 1.3µs typical response time under 5.1kΩ load with 5mV overdrive, and maintains stable 200mV saturation voltage at 4mA sink current. The device draws supply current independent of VCC magnitude due to internal bias network design.

Key Specifications

Pinout & Package

TSSOP-8 package: 3mm × 3mm body, 0.65mm pitch, 1.2mm height, green mold compound, RoHS-compliant, halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, the LM2903ATH-13 uniquely balances wide supply range (2–36V), ground-sensing capability, and production-proven robustness for industrial voltage monitoring-without sacrificing pin compatibility or thermal performance in TSSOP-8.

Availability

LM2903ATH-13 is available at Aetrix Electronics and suitable for overvoltage protection circuits, zero-crossing detection, level-shifting interfaces, and battery voltage monitoring requiring stable component supply across automotive, industrial control, and power management designs.

Supply support for LM2903ATH-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 emphasis on reliability, efficiency, and application-specific integration.

The LM2903 series belongs to Diodes' precision comparator product line, engineered for industrial and automotive voltage monitoring, fault detection, and signal conditioning where wide supply range and ground-referenced inputs are essential.

FAQ

What is the maximum differential input voltage the LM2903ATH-13 can tolerate?

The LM2903ATH-13 supports up to 36V differential input voltage (VID), and inputs may exceed the positive supply rail without damage-as long as the common-mode voltage stays within 0V to VCC−1.5V and negative excursions do not fall below −0.3V. This enables direct interface with unregulated or floating sensor signals.

Can the LM2903ATH-13 operate from a single 3.3V supply?

Yes-the LM2903ATH-13 is fully specified down to 2V supply, making it functional at 3.3V. At this voltage, input common-mode range spans 0V to 1.8V, output saturation remains ≤200mV at 4mA, and supply current drops to ~0.6mA, supporting low-power 3.3V microcontroller systems.

Does the LM2903ATH-13 require external hysteresis for stable operation?

Hysteresis is recommended when comparing slowly varying or noisy signals (e.g., temperature sensor outputs), as the comparator's high gain can cause oscillation near threshold. For clean, fast-rising signals like clock edges or digital pulses, hysteresis is not required-per application note guidance in DS36779 Rev 4.

Is the LM2903ATH-13 pin-compatible with other LM2903 variants in TSSOP-8?

Yes-LM2903ATH-13 shares identical TSSOP-8 pinout and electrical characteristics with LM2903TH-13 (non-A grade) and LM2903AM8-13 (MSOP-8), differing only in input offset voltage specification (1mV vs. 2mV typ) and package thermal resistance (185°C/W for TSSOP-8 vs. 160°C/W for MSOP-8).