LP2901N Equivalent & Substitute Parts

Part Overview

The LP2901N is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent comparator elements in a 14-pin DIP package. This device operates across a wide supply voltage range of 3V to 30V and is designed for applications requiring CMOS, MOS, and open-collector output configurations. The LP2901N is currently in Last Time Buy status, making identification of active substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

LP2901N

Texas InstrumentsIn Stock: 4581LP2901N Datasheet

Current PartRFQ

LP2901DR

Texas InstrumentsIn Stock: 18387LP2901DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2901N is determined by equivalence across the following critical parameters:

• Base product number (LP2901 series)
• Number of comparator elements (4)
• Output type configuration (CMOS, MOS, Open-Collector)
• Supply voltage range (3V ~ 30V)
• Electrical performance specifications (input offset, bias current, output current, quiescent current)
• Operating temperature range (-40°C ~ 85°C)
• Regulatory compliance (ROHS3, REACH Unaffected)

The primary distinction between the LP2901N and its substitute lies in packaging and mounting technology. The LP2901N uses through-hole 14-DIP packaging, while the LP2901DR employs surface-mount 14-SOIC packaging. Both variants maintain identical electrical characteristics and functional specifications, enabling direct functional substitution where board-level design accommodates the different package footprint.

Parameter Comparison

Engineering Selection Recommendations

The LP2901DR serves as the active production substitute for the LP2901N. Both parts maintain identical electrical specifications and functional performance across all operating conditions. The LP2901DR holds Active product status, ensuring continued availability and manufacturing support, whereas the LP2901N is designated Last Time Buy.

Selection between these parts is determined by board-level design requirements:

• Through-hole applications: LP2901N remains suitable for existing designs utilizing DIP socket footprints or through-hole assembly processes.
• Surface-mount applications: LP2901DR is the appropriate choice for modern PCB designs employing surface-mount technology and SOIC package footprints.

Both parts satisfy ROHS3 compliance and REACH regulatory requirements, making them suitable for applications subject to environmental and hazardous substance restrictions. The LP2901DR's Active status provides superior long-term supply chain stability for new designs and ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the LP2901DR directly replace the LP2901N in existing designs?

A: Electrical and functional replacement is direct. The LP2901DR maintains identical specifications across all electrical parameters, supply voltage range, and operating temperature. However, physical replacement requires PCB redesign to accommodate the 14-SOIC surface-mount footprint in place of the 14-DIP through-hole package.

Q: What are the key differences between LP2901N and LP2901DR?

A: The parts are electrically identical. Differences are limited to packaging format (14-DIP through-hole versus 14-SOIC surface-mount) and product status (Last Time Buy versus Active). Mounting technology and board footprint requirements differ accordingly.

Q: Why is the LP2901N designated Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued active production of the through-hole 14-DIP variant. The LP2901DR surface-mount version remains in active production, reflecting industry-wide transition toward surface-mount assembly technologies.

Q: Are there any electrical performance differences between the two parts?

A: No. Both parts exhibit identical electrical characteristics: 3V to 30V supply range, 5mV maximum input offset voltage, 0.025µA maximum input bias current, 30mA typical output current, and 100µA maximum quiescent current across the -40°C to 85°C operating temperature range.

Q: Which part should be selected for new designs?

A: The LP2901DR is the appropriate selection for new designs. Active product status ensures manufacturing continuity, supply availability, and technical support. The LP2901N should be reserved for legacy system maintenance where through-hole assembly is required.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the LP2901N and LP2901DR are ROHS3 compliant and REACH unaffected, satisfying equivalent environmental and hazardous substance regulatory requirements.