Texas Instruments LM2901PWRE4

Overview

LM2901PWRE4 from Texas Instruments is a quad differential comparator IC designed for single- or dual-supply operation across –40°C to 125°C. It features 7 mV max input offset voltage, 0.8 mA typical supply current (four comparators), open-collector outputs compatible with TTL/MOS/CMOS, and a wide 2 V to 30 V supply range. It is used in overvoltage detection, window comparators, and level-shifting interfaces in industrial control systems.

For engineers reviewing the LM2901PWRE4 datasheet, LM2901PWRE4 pinout, LM2901PWRE4 application, or LM2901PWRE4 equivalent, key selection considerations include its extended temperature rating, open-collector output drive capability, input common-mode range extending to ground, and compatibility with legacy LM339-based designs requiring enhanced thermal performance.

Technical Context

The LM2901PWRE4 implements four independent voltage comparators with rail-to-rail input common-mode range (including ground) and differential input voltage capability up to ±36 V. Its open-collector outputs support wired-AND logic and interface directly with 3.3 V or 5 V digital logic families without pull-up conflicts.

Designed for robust operation in harsh environments, it maintains specified performance across –40°C to 125°C, with input bias current ≤500 nA (max), low output saturation voltage (≤700 mV at 4 mA sink), and supply current independent of VCC - enabling stable power budgeting in battery-backed or wide-input-voltage systems.

Key Specifications

Pinout & Package

TSSOP-14 package (PW), 4.4 mm × 5.0 mm body, 0.65 mm pitch, exposed pad optional (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339PWR, LM2901PWRE4 provides guaranteed operation at –40°C and 125°C while maintaining identical footprint and logic behavior; compared with LM2901VQPWR, it trades 2 V lower absolute maximum supply for broader availability and lower unit cost in standard 30 V systems.

Availability

LM2901PWRE4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and renewable energy inverters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2901PWRE4 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 emphasis on reliability, longevity, and industrial-grade qualification.

The LM2901 product line delivers quad comparators optimized for harsh-environment applications including automotive, industrial automation, and power management - prioritizing wide temperature range, robust ESD tolerance, and consistent parametric performance.

FAQ

What is the maximum supply voltage rating for LM2901PWRE4?

The LM2901PWRE4 has an absolute maximum supply voltage (VCC) rating of 36 V, but its recommended maximum operating voltage is 30 V for non-V-suffix devices. This limit ensures long-term reliability and parametric compliance across the full –40°C to 125°C temperature range. Exceeding 30 V may cause accelerated parameter drift or reduced lifetime, even if within absolute ratings.

Does LM2901PWRE4 require external pull-up resistors on its outputs?

Yes, LM2901PWRE4 requires external pull-up resistors on all four open-collector outputs (pins 1, 6, 8, 13). The device cannot source current; each output sinks current only. Typical values range from 2.2 kΩ to 10 kΩ depending on logic family (e.g., 4.7 kΩ for 5 V TTL, 10 kΩ for 3.3 V CMOS), and placement should be as close as possible to the LM2901PWRE4 pins to minimize noise coupling.

Can LM2901PWRE4 inputs safely operate below ground potential?

No, LM2901PWRE4 inputs must remain within –0.3 V minimum, as specified in Absolute Maximum Ratings. Input voltages below –0.3 V relative to GND risk forward-biasing internal ESD protection diodes, causing excessive current flow and potential damage. For sub-ground sensing, external level-shifting circuitry or a comparator with negative rail capability (e.g., TLV3701) is required.

How does the input offset voltage of LM2901PWRE4 affect precision threshold detection?

The LM2901PWRE4 has a maximum input offset voltage of 7 mV across temperature. This introduces up to ±3.5 mV uncertainty in threshold setting - meaning a nominal 2.5 V trip point could activate between 2.4965 V and 2.5035 V. For sub-millivolt accuracy, external trimming or auto-zero architectures are needed; LM2901PWRE4 is suited for applications where ≥10 mV hysteresis or ≥14 mV signal swing accommodates this inherent error band.

Is LM2901PWRE4 pin-compatible with LM339-based PCB layouts?

Yes, LM2901PWRE4 uses the same TSSOP-14 (PW) package and identical pinout as LM339PWR, LM239PW, and LM2901PW - enabling drop-in replacement in existing designs. No PCB changes are required. However, designers must verify that the extended –40°C to 125°C operation and 7 mV VIO spec meet system requirements, as LM339PWR is rated only from 0°C to 70°C with 5 mV VIO.