LM2901NS Equivalent & Substitute Parts

Part Overview

The LM2901NS is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent comparators with open-collector outputs in a 14-SOIC surface-mount package. This device operates across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply), making it suitable for analog signal comparison applications in industrial and consumer electronics.

The LM2901NS currently holds Last Time Buy status, indicating that Texas Instruments has discontinued this product line. This status necessitates identification of functionally equivalent alternatives to ensure design continuity and long-term component availability for new production runs and legacy system maintenance.

Substiute Parts

LM2901NS

Texas InstrumentsIn Stock: 78442LM2901NS Datasheet

Current PartRFQ

LM2901DR

Rohm SemiconductorIn Stock: 205484LM2901DR Datasheet

MFR RecommendedRFQ

LM2901AQT14-13

Diodes IncorporatedIn Stock: 19390LM2901AQT14-13 Datasheet

SimilarRFQ

LM2901QS14-13

Diodes IncorporatedIn Stock: 17638LM2901QS14-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2901NS is determined by strict alignment with the following critical parameters:

Core Compatibility Criteria:

• Number of Elements: Must be 4 independent comparators
• Output Type: Must include Open-Collector capability
• Supply Voltage Range: Must support 2V ~ 30V (single) or ±1V ~ 15V (dual) minimum
• Input Offset Voltage: Maximum 7mV @ 5V
• Input Bias Current: Maximum 0.25µA @ 5V
• Output Current: Minimum 16mA @ 5V
• Quiescent Current: Maximum 2.5mA
• Operating Temperature: Must cover -40°C ~ 125°C
• Package Type: Surface-mount only (14-SOIC or 14-TSSOP acceptable)
• RoHS Compliance: ROHS3 Compliant required

Identified Substitute Categories:

1. MFR Recommended Substitute (Rohm Semiconductor): LM2901DR meets all core electrical parameters with expanded supply voltage range (2V ~ 36V, ±1V ~ 18V). Package width differs (3.90mm vs 5.30mm), requiring PCB layout verification.

2. Similar Manufacturer Substitutes (Diodes Incorporated): LM2901AQT14-13 and LM2901QS14-13 both maintain full parameter compatibility with automotive-grade qualification (AEC-Q100). Package options include 14-TSSOP and 14-SOIC variants with reduced package widths (4.40mm and 3.90mm respectively).

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring environmental and moisture-handling compatibility with the original LM2901NS.

Parameter Comparison

Engineering Selection Recommendations

For New Production Designs:

The LM2901AQT14-13 and LM2901QS14-13 from Diodes Incorporated are the preferred substitutes for the LM2901NS. Both parts maintain Active product status, ensuring long-term availability and supply chain stability. The Diodes Incorporated variants carry AEC-Q100 automotive qualification, providing additional reliability assurance for mission-critical applications. The LM2901AQT14-13 offers superior input offset voltage specification (2mV vs 7mV), beneficial for precision comparison applications.

For Legacy System Maintenance:

The LM2901DR from Rohm Semiconductor provides electrical compatibility with expanded supply voltage margins (2V ~ 36V vs 2V ~ 30V). However, this part carries Obsolete status, limiting its suitability for long-term procurement. The LM2901DR should be considered only when immediate component availability is critical and design modifications to accommodate package width reduction (3.90mm vs 5.30mm) are feasible.

Package Considerations:

All substitute parts employ reduced-width packages compared to the original LM2901NS (5.30mm). The LM2901QS14-13 maintains the 14-SOIC package format with 3.90mm width, requiring minimal PCB layout modification. The LM2901AQT14-13 uses 14-TSSOP format (4.40mm width), offering a compromise between footprint reduction and pin accessibility.

Compliance and Certification:

All identified substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing processes and environmental regulations. The Diodes Incorporated parts include REACH compliance documentation and EAR99 export classification, supporting global supply chain requirements.

Frequently Asked Questions (FAQ)

Q1: Can the LM2901DR be used as a direct replacement for the LM2901NS?

A: The LM2901DR meets all core electrical specifications for the LM2901NS. However, the package width differs (3.90mm vs 5.30mm), requiring PCB layout verification. Additionally, the LM2901DR carries Obsolete product status, limiting long-term availability. For new designs, the Diodes Incorporated alternatives are preferred.

Q2: What is the primary difference between LM2901AQT14-13 and LM2901QS14-13?

A: Both parts are functionally equivalent with identical electrical parameters and operating ranges. The LM2901AQT14-13 uses 14-TSSOP packaging (4.40mm width), while the LM2901QS14-13 uses 14-SOIC packaging (3.90mm width). Selection depends on PCB layout constraints and soldering process compatibility.

Q3: Does the LM2901AQT14-13 superior input offset voltage (2mV vs 7mV) require circuit redesign?

A: No circuit redesign is required. The improved input offset voltage specification of the LM2901AQT14-13 provides enhanced accuracy margin without affecting functional compatibility. Existing designs will operate correctly with this part.

Q4: Are all substitute parts suitable for automotive applications?

A: The LM2901AQT14-13 and LM2901QS14-13 carry AEC-Q100 automotive qualification, making them suitable for automotive-grade applications. The LM2901DR does not specify automotive qualification. Application requirements should determine the appropriate selection.

Q5: What PCB layout modifications are necessary when switching from LM2901NS to a substitute part?

A: Package width reduction requires verification of trace routing and component spacing around the IC footprint. The pin configuration remains identical across all substitutes, so no schematic changes are necessary. Consult the specific package datasheet for exact footprint dimensions before PCB layout modification.

Q6: Can multiple substitute parts be used interchangeably within the same production batch?

A: Yes, all identified substitutes meet the core electrical and environmental specifications of the LM2901NS. However, using multiple suppliers within a single production batch may introduce supply chain complexity. Standardizing on a single substitute part is recommended for manufacturing consistency.

Q7: What is the significance of the Last Time Buy status for the LM2901NS?

A: Last Time Buy status indicates that Texas Instruments has discontinued the LM2901NS and will no longer accept new orders after a specified date. Existing inventory will be depleted, making substitution necessary for any production beyond the Last Time Buy deadline. Immediate transition to an alternative part is recommended.