Diodes Incorporated AS339MTR-G1

Overview

AS339MTR-G1 from Diodes Incorporated is a quad precision voltage comparator IC 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, PC motherboards, and DC-DC modules for threshold detection and level translation.

For engineers reviewing the AS339MTR-G1 datasheet, AS339MTR-G1 pinout, AS339MTR-G1 application, or AS339MTR-G1 equivalent, key selection criteria include input offset voltage tightness, rail-to-rail common-mode range including ground, open-collector output compatibility with TTL/CMOS logic, and SO-14 package thermal performance at elevated ambient temperatures.

Technical Context

The AS339MTR-G1 implements four independent PNP-input comparators with high DC gain (>200 V/mV) and fast response time (200 ns for 5 mV overdrive). Its input stage operates with common-mode voltage down to ground and up to V_CC−1.5 V, enabling direct sensing of low-side current shunts or battery terminals.

Each comparator features open-collector output capable of sinking ≥6.0 mA at 1.5 V saturation, with leakage <0.1 nA at 5 V and <1 µA at 30 V. The device's supply current remains stable across 2.0–36 V, decoupling power budgeting from input voltage variation in wide-range industrial supplies.

Key Specifications

Pinout & Package

AS339MTR-G1 is housed in a RoHS-compliant, green (halogen/antimony-free) SO-14 surface-mount package with 1.27 mm lead pitch and 89 °C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TL331IDBVR, AS339MTR-G1 uniquely combines quad integration, 2.0 mV offset, green packaging, and 0.9 mA supply current - making it optimal for space-constrained, environmentally regulated, multi-rail monitoring in industrial and computing power systems.

Availability

AS339MTR-G1 is available at Aetrix Electronics and suitable for battery charger monitoring, PC motherboard power sequencing, and DC-DC module fault detection requiring stable component supply across automotive-grade temperature ranges (−40°C to +85°C).

Supply support for AS339MTR-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 devices for industrial, computing, and consumer markets.

The AS339 series belongs to Diodes' precision analog comparator product line, engineered for robust performance in multi-rail power monitoring and battery management systems where accuracy, supply flexibility, and environmental compliance are critical.

FAQ

What is the maximum differential input voltage the AS339MTR-G1 can withstand?

The AS339MTR-G1 supports a maximum differential input voltage (V_ID) of 40 V, as specified in its Absolute Maximum Ratings. This allows safe operation even when one input is driven to V_CC while the other is grounded - critical for detecting large-swing signals in motor control or power supply feedback paths without clamping diodes.

Can the AS339MTR-G1 operate with a 3.3 V single supply?

Yes - the AS339MTR-G1 functions across a single-supply range of 2.0 V to 36 V, including 3.3 V. At this voltage, its typical supply current is 0.9 mA, input offset remains 2.0 mV, and output saturation voltage stays below 400 mV at 4 mA sink, ensuring reliable interfacing with 3.3 V logic families using appropriate pull-up resistors.

Does the AS339MTR-G1 require external hysteresis for noise immunity?

Hysteresis is not built-in but can be added externally via positive feedback from output to non-inverting input. Given its 200 V/mV typical gain and 200 ns response, external hysteresis (e.g., 10–50 mV) is recommended for noisy environments like switching power supply feedback or motor current sensing to prevent output oscillation near threshold.

Is the AS339MTR-G1 pin-compatible with legacy industry-standard 339 comparators?

Yes - the AS339MTR-G1 uses the standard SO-14 pinout defined for quad comparators (e.g., LM339, TLC3704), with identical pin assignments for inputs, outputs, V_CC, and GND. This enables drop-in replacement in existing designs without layout changes, provided the tighter 2.0 mV offset and green packaging meet system requirements.