Texas Instruments LM339AN/PB

Overview

LM339AN/PB from Texas Instruments is a quad voltage comparator IC with open-collector outputs, designed for single-supply operation from 2 V to 36 V (or ±1 V to ±18 V). It delivers ±3 mV max input offset voltage, 0.8 mA typical supply current per comparator, 25 nA input bias current, and input common-mode range extending to ground - enabling precision threshold detection in industrial control, power monitoring, and analog-to-digital interface circuits.

For engineers reviewing the LM339AN/PB datasheet, LM339AN/PB pinout, LM339AN/PB application, or LM339AN/PB equivalent, key selection considerations include its rail-to-rail input capability down to GND, TTL/CMOS-compatible output sinking up to 16 mA, low-power operation suitable for battery-backed systems, and compatibility with wired-OR logic configurations.

Technical Context

The LM339AN/PB integrates four independent high-gain comparators on a monolithic silicon die, each featuring a PNP differential input stage that enables input voltages down to GND on single supply. Its uncommitted NPN open-collector output transistors allow flexible pull-up voltage selection up to 36 V and support wired-OR logic without level-shifting circuitry.

Unlike comparators with internal clamps or rail-to-rail output stages, the LM339AN/PB relies on external pull-up resistors and exhibits 250 mV typical saturation voltage at 4 mA sink current. Its bias network ensures supply-current independence across 2–36 V, and its differential input voltage tolerance extends to ±36 V - exceeding the supply rails without damage.

Key Specifications

Pinout & Package

LM339AN/PB is housed in a 14-pin plastic dual in-line package (PDIP) with 0.300-inch body width and through-hole mounting. Pin spacing follows standard 0.1-inch grid; leads are tin-lead plated for solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339N and LM2901N, LM339AN/PB offers guaranteed Pb/Sn termination for legacy manufacturing, tighter ±3 mV offset specification, and qualification for commercial temperature range - making it optimal for cost-sensitive, ground-referenced comparator applications requiring proven solderability and precision at room temperature.

Availability

LM339AN/PB is available at Aetrix Electronics and suitable for industrial control systems, power supply supervision, and sensor interface modules requiring stable component supply with long-term manufacturability and legacy process compatibility.

Supply support for LM339AN/PB 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 specializing in analog and embedded processing technologies, with decades of experience in precision linear ICs and industrial-grade components.

The LM339AN/PB belongs to TI's legacy LMx39-N quad comparator family, engineered for robust, low-cost analog decision-making in harsh environments - emphasizing single-supply usability, GND-referenced inputs, and open-collector flexibility.

FAQ

What is the operating temperature range for LM339AN/PB?

The LM339AN/PB is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating aligns with its intended use in non-extended-environment applications such as consumer electronics, office equipment, and general-purpose industrial controls where thermal margins are moderate. The device's electrical characteristics - including offset voltage, supply current, and response time - are guaranteed within this range per the official TI datasheet SNOSBJ3E.

Does LM339AN/PB support dual-supply operation?

Yes, LM339AN/PB supports dual-supply operation with ±1 V to ±18 V applied to V+ and GND terminals (where GND becomes the negative rail). In this configuration, the input common-mode range extends from −0.3 V to V+ − 1.5 V, and outputs swing between GND and V+. The device maintains its 25 nA input bias current and ±3 mV offset voltage specifications under dual-supply conditions, as confirmed in Section 6.6 of the TI datasheet.

Can LM339AN/PB drive TTL logic directly?

Yes, LM339AN/PB can directly drive TTL logic inputs when configured with an appropriate pull-up resistor (typically 1–5 kΩ) to +5 V. Its open-collector output sinks up to 16 mA and achieves ≤250 mV saturation voltage at 4 mA, satisfying TTL LOW-level input requirements (≤0.8 V). The output voltage swing is compatible with standard TTL, DTL, ECL, MOS, and CMOS families - as explicitly stated in the "Features" section of the TI datasheet.

What is the maximum differential input voltage for LM339AN/PB?

The maximum differential input voltage for LM339AN/PB is ±36 V - meaning either input may exceed the supply rail by up to 36 V without damage, provided the other input remains within the common-mode range. This specification applies across all variants in the LMx39-N family and is documented in Section 6.1 (Absolute Maximum Ratings) of the TI datasheet SNOSBJ3E. No external clamping is required for transient overvoltage protection within this limit.

Is LM339AN/PB pin-compatible with LM339N?

Yes, LM339AN/PB is fully pin-compatible with LM339N: both use the same 14-pin PDIP package, identical pin numbering, and identical electrical functionality. The sole difference is termination - LM339AN/PB features SnPb (85/15) plating for compatibility with legacy solder processes, while LM339N uses lead-free matte tin. Mechanical dimensions, thermal characteristics, and all electrical parameters match per TI's official documentation.