Diodes Incorporated AS339AMTR-G1

Overview

AS339AMTR-G1 from Diodes Incorporated is a quad precision voltage comparator with 2.0 mV typical input offset voltage, open-collector outputs, and operation from single supply (2.0 V to 36 V) or dual supply (±1.0 V to ±18 V). It delivers 0.9 mA supply current, 25 nA typical input bias current, and supports ground-sensing inputs - used in battery chargers, DC-DC modules, PC motherboards, and switching power supplies.

For engineers reviewing the AS339AMTR-G1 datasheet, AS339AMTR-G1 pinout, AS339AMTR-G1 application, or AS339AMTR-G1 equivalent, this page provides verified functional identity, SO-14 package mapping, validated pin roles, confirmed low-offset performance, and real-world design context for industrial and embedded power management systems.

Technical Context

The AS339AMTR-G1 integrates four independent comparators with PNP-input stage architecture enabling rail-to-rail common-mode input range down to ground and differential input voltage equal to full supply rails. Its open-collector outputs allow wired-OR logic and flexible pull-up configuration across diverse voltage domains.

Designed as a drop-in replacement for industry-standard LM339, the AS339A variant tightens input offset voltage specification to ≤3 mV (max) at +25°C and ≤5 mV over –40°C to +85°C - critical for precision threshold detection in battery voltage monitoring and power sequencing circuits.

Key Specifications

Pinout & Package

AS339AMTR-G1 is housed in a 14-pin SOIC (SO-14) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant outline, and RoHS-compliant green molding compound. Thermal resistance is 89 °C/W (junction-to-ambient), supporting operation up to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TL331IDBVR, AS339AMTR-G1 uniquely combines quad integration, 2.0 mV typical offset, SO-14 green packaging, and 0.9 mA supply current - making it optimal for compact, low-power, multi-rail industrial and computing power management where component count and environmental compliance matter.

Availability

AS339AMTR-G1 is available at Aetrix Electronics and suitable for battery charger monitoring, PC motherboard power sequencing, and DC-DC module overvoltage protection requiring stable component supply, RoHS3 compliance, and long-term industrial availability.

Supply support for AS339AMTR-G1 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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AS339A series belongs to Diodes' precision analog comparator product line, engineered specifically for low-offset, wide-supply, ground-sensing applications in power supply supervision and battery management systems.

FAQ

What is the maximum supply voltage for AS339AMTR-G1?

The AS339AMTR-G1 supports an absolute maximum supply voltage of 40 V, with recommended operation from 2.0 V to 36 V on single supply. This allows direct use with 24 V industrial rails and 36 V automotive battery systems while maintaining guaranteed performance up to +85°C ambient.

Does AS339AMTR-G1 require a dual supply to operate?

No - AS339AMTR-G1 operates from a single supply as low as 2.0 V. Its input common-mode range includes ground, and its open-collector outputs function correctly with pull-up to any compatible logic voltage, eliminating need for negative rails in most applications.

How does the AS339A differ from the standard AS339?

The AS339A features tighter input offset voltage specifications: 2.0 mV typical and 3 mV maximum at +25°C (vs. 2.0 mV typical and 5 mV maximum for AS339), making it preferred for precision threshold detection where calibration is impractical or cost-sensitive.

Can AS339AMTR-G1 drive a MOSFET gate directly?

No - AS339AMTR-G1 has open-collector outputs rated for 16 mA sink current and 200 mV saturation voltage at 4 mA. To drive a MOSFET gate, an external pull-up resistor and optionally a buffer transistor or dedicated gate driver must be used to provide sufficient dV/dt and charge current.