Texas Instruments LM339ANSRG4

Overview

LM339ANSRG4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 1 µs propagation delay, 2 kV HBM ESD rating, and rail-to-rail common-mode input range down to ground - used in server PSU overvoltage detection, motor drive current sensing, and industrial safety interlocks.

For engineers reviewing the LM339ANSRG4 datasheet, LM339ANSRG4 pinout, LM339ANSRG4 application, or LM339ANSRG4 equivalent, this page delivers verified specifications, SOIC-14 package details, functional pin mapping, real-world use cases, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The LM339ANSRG4 implements four independent open-collector comparators with internal ESD clamps, enabling robust operation up to 38 V absolute maximum supply and ±38 V differential input voltage. Its input stage supports common-mode voltages from ground to (V_CC – 2 V), allowing direct interface with sensors referenced to ground or high-side signals.

Each comparator delivers 21 mA sink capability at low output saturation (≤400 mV @ 4 mA), TTL/MOS/CMOS-compatible output logic, and quiescent current of 0.8–1.6 mA over full temperature range (–40°C to +85°C), making it suitable for power-constrained industrial control nodes.

Key Specifications

Pinout & Package

LM339ANSRG4 is housed in a 14-pin SOIC (NS) package measuring 8.70 mm × 3.90 mm, with gull-wing leads and standard JEDEC MS-012 outline. Pin 12 is GND; pins 1, 2, 13, and 14 are open-collector outputs; inputs are paired on pins 3/4, 5/6, 8/9, and 10/11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339BDR and LM2901DT, LM339ANSRG4 provides optimal balance of industrial temperature range, SOIC-14 manufacturability, and thermal performance - making it the default choice for server PSU, motor drive, and factory automation applications operating below +85°C.

Availability

LM339ANSRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive protection, and factory automation safety interlocks requiring stable component supply, long-term lifecycle support, and TI-qualified industrial-grade reliability.

Supply support for LM339ANSRG4 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 50 years of expertise in precision analog ICs and industrial-grade components.

The LM339 family was engineered for robust, low-cost voltage comparison in harsh industrial environments - emphasizing rail-to-rail input operation, open-collector flexibility, and wide supply tolerance to simplify system-level design.

FAQ

What is the maximum supply voltage for LM339ANSRG4?

The LM339ANSRG4 supports an absolute maximum supply voltage of 38 V, with recommended operation from 2 V to 36 V. This wide range allows direct integration into 24 V and 48 V industrial power systems without external regulators, and its input stage tolerates differential voltages up to ±38 V - critical for high-side sensing applications. Always observe derating guidelines above 30 V for long-term reliability.

Does LM339ANSRG4 require external pull-up resistors on its outputs?

Yes, LM339ANSRG4 features open-collector outputs (pins 1, 2, 13, 14), so external pull-up resistors are mandatory for logic-level generation. Typical values range from 1 kΩ (for fast rise times driving heavy loads) to 10 kΩ (for low-power microcontroller interfacing). The device sinks up to 21 mA per output, enabling direct drive of LEDs or small relays when appropriately sized.

Is LM339ANSRG4 pin-compatible with older LM339 variants?

Yes, LM339ANSRG4 is a B-version part and serves as a drop-in replacement for LM339, LM239, and LM2901 in SOIC-14 packaging. It retains identical pinout, electrical interface, and footprint while improving input offset (±0.37 mV typ), propagation delay (1 µs), and ESD rating (2 kV HBM) - no PCB or schematic changes are needed for migration.

What is the operating temperature range of LM339ANSRG4?

The LM339ANSRG4 is specified for operation from –40°C to +85°C ambient temperature, qualifying it for industrial environments such as server racks, PLC cabinets, and factory-floor controllers. Its electrical characteristics - including ±5.5 mV max input offset and 0.8–1.6 mA quiescent current - are guaranteed across this full range, ensuring consistent performance without derating.

Can LM339ANSRG4 interface directly with CMOS or TTL logic?

Yes, LM339ANSRG4 outputs are compatible with TTL, MOS, and CMOS logic families when used with appropriate pull-up resistors. With a 5 V pull-up, its low-level output voltage stays ≤400 mV (at 4 mA sink), satisfying TTL's V_IL ≤ 0.8 V and CMOS's V_IL ≤ 30% V_DD requirements. Its 21 mA sink capability also supports direct driving of standard logic inputs without buffering.