Texas Instruments LM339APWRG4

Overview

LM339APWRG4 from Texas Instruments is a quad differential voltage comparator IC designed for single-supply operation across 2 V to 36 V. It delivers ±5.5 mV max input offset voltage (over temperature), 1.3 µs typical response time, 200 µA per comparator quiescent current, and rail-to-rail common-mode input range down to ground-enabling precision threshold detection in industrial power supply monitoring and motor control feedback loops.

For engineers reviewing the LM339APWRG4 datasheet, LM339APWRG4 pinout, LM339APWRG4 application, or LM339APWRG4 equivalent, key selection criteria include its guaranteed 36 V absolute maximum supply rating, open-collector TTL/MOS/CMOS-compatible outputs, −25°C to +85°C operating temperature range, and SOIC-14 package compatibility with legacy LM339 designs requiring low-cost, robust analog comparison.

Technical Context

The LM339APWRG4 implements four independent high-gain comparators with internal ESD protection (2 kV HBM) and dedicated input clamps. Its input stage supports common-mode voltages from ground to (V_CC − 2 V), and differential inputs tolerate up to ±36 V without damage-making it suitable for direct sensing of high-side signals in unregulated DC rails.

Output stages are open-collector NPN transistors capable of sinking ≥6 mA at 1.5 V saturation, compatible with external pull-up resistors to any logic rail up to 36 V. Propagation delay is specified under 100 mV overdrive and 15 pF load, ensuring reliable timing in window comparators and zero-crossing detectors.

Key Specifications

Pinout & Package

LM339APWRG4 is housed in a 14-pin SOIC (PW) package measuring 8.70 mm × 3.90 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339APWRG4, LM339B offers lower offset and faster response for precision timing-critical systems, while LM2901 provides broader temperature coverage at the cost of reduced accuracy-both maintain pin compatibility and open-collector output architecture.

Availability

LM339APWRG4 is available at Aetrix Electronics and suitable for industrial power supply supervision, motor control feedback, appliance safety interlocks, and building automation sensor conditioning requiring stable component supply and long-term obsolescence management.

Supply support for LM339APWRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The LM339 family was engineered as a cost-optimized, general-purpose quad comparator platform for single-supply voltage monitoring, fault detection, and analog-to-digital signal conditioning in resource-constrained systems.

FAQ

What is the maximum supply voltage rating for LM339APWRG4?

The LM339APWRG4 has an absolute maximum supply voltage rating of 36 V, verified per TI's SLCS006Z datasheet Section 6.2. This allows direct use in 24 V industrial systems with margin for transients. Operation above 36 V risks permanent damage; recommended operating range remains 2 V to 36 V per Section 6.5.

Does LM339APWRG4 support rail-to-rail input operation?

Yes, LM339APWRG4 supports common-mode input voltages from ground (V₋) to (V_CC − 2 V), confirmed in Section 6.10 of the datasheet. This enables direct connection to grounded sensors or shunt resistors without level-shifting circuitry-critical for low-side current monitoring applications.

What is the typical response time of LM339APWRG4 under standard test conditions?

The LM339APWRG4 exhibits a typical response time of 1.3 µs, measured with a 100 mV input step and 5 mV overdrive, RL = 5.1 kΩ, CL = 15 pF, and V_CC = 5 V (Section 6.14). This value holds across its full operating temperature range and supports reliable detection in switching power supplies up to 500 kHz.

Can LM339APWRG4 outputs drive CMOS logic directly?

Yes, LM339APWRG4 outputs are open-collector and fully compatible with CMOS logic when used with an appropriate external pull-up resistor to the target logic rail (e.g., 3.3 V or 5 V). The datasheet explicitly states "Output compatible with TTL, MOS, and CMOS" in Section 1, and sink current capability exceeds CMOS input leakage requirements.

Is LM339APWRG4 pin-compatible with older LM339 variants?

Yes, LM339APWRG4 uses the industry-standard 14-pin SOIC (PW) package and identical pin configuration to LM339, LM239, and LM2901 devices per Figure 5-1 and Table 5-1. No PCB layout changes are needed for drop-in replacement-though designers should verify input offset and temperature range suitability for their specific application.