LM2901DRCT Equivalent & Substitute Parts

Part Overview

The LM2901DRCT is a general-purpose comparator manufactured by Texas Instruments, featuring four independent differential 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 LM2901DRCT currently holds Last Time Buy status, indicating that Texas Instruments has discontinued this specific part number. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this comparator.

Substiute Parts

LM2901DRCT

Texas InstrumentsIn Stock: 879LM2901DRCT Datasheet

Current PartRFQ

LM2901QDRQ1

Texas InstrumentsIn Stock: 1384LM2901QDRQ1 Datasheet

MFR RecommendedRFQ

LM2901AS14-13

Diodes IncorporatedIn Stock: 12770LM2901AS14-13 Datasheet

SimilarRFQ

LM2901QS14-13

Diodes IncorporatedIn Stock: 17638LM2901QS14-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2901DRCT is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Four independent comparators per package
• Open-collector output configuration
• Supply voltage range compatibility (minimum 2V ~ 30V single supply or ±1V ~ 15V dual supply)
• Input offset voltage specification (7mV @ 5V maximum)
• Input bias current specification (0.25µA @ 5V maximum)
• Output current capability (minimum 16mA @ 5V)
• Quiescent current specification (2.5mA maximum)
• Operating temperature range (-40°C ~ 125°C)
• 14-SOIC package form factor
• Surface-mount technology

Substitute Parts Identified:

1. LM2901QDRQ1 (Texas Instruments) – Manufacturer-recommended direct substitute with enhanced supply voltage range (2V ~ 36V, ±1V ~ 18V) and automotive-grade qualification (AEC-Q100)

2. LM2901AS14-13 (Diodes Incorporated) – Functionally equivalent with improved input offset voltage specification (2mV @ 5V) and active product status

3. LM2901QS14-13 (Diodes Incorporated) – Functionally equivalent with CMOS/TTL output compatibility and automotive-grade qualification (AEC-Q100)

All three substitute parts maintain the 14-SOIC package, surface-mount configuration, and core electrical specifications required for direct substitution in existing designs.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LM2901QDRQ1

The LM2901QDRQ1 is the manufacturer-recommended substitute from Texas Instruments. This part maintains full functional equivalence with the LM2901DRCT while offering active product status and extended supply voltage range (2V ~ 36V, ±1V ~ 18V). The LM2901QDRQ1 carries automotive-grade qualification (AEC-Q100) and ROHS3 compliance, making it suitable for both commercial and automotive applications. Current availability is 1285 pieces in stock.

Secondary Recommendation: LM2901QS14-13

The LM2901QS14-13 from Diodes Incorporated provides an alternative with active product status and automotive-grade qualification (AEC-Q100). This part features CMOS/TTL output compatibility and maintains MSL 1 (Unlimited) moisture sensitivity rating. Current availability is 17600 pieces in stock, offering superior supply chain availability.

Tertiary Recommendation: LM2901AS14-13

The LM2901AS14-13 from Diodes Incorporated offers the lowest input offset voltage specification (2mV @ 5V) among all substitutes, providing improved precision for applications requiring tighter input offset tolerance. This part maintains active product status with 12700 pieces in stock. Note that this part carries MSL 3 (168 Hours) moisture sensitivity rating, requiring controlled storage conditions.

Selection Criteria by Application:

• Automotive applications: Select LM2901QDRQ1 or LM2901QS14-13 for AEC-Q100 qualification
• High-precision applications: Select LM2901AS14-13 for superior input offset voltage specification (2mV @ 5V)
• Maximum supply chain availability: Select LM2901QS14-13 (17600 pieces in stock)
• Extended supply voltage range: Select LM2901QDRQ1 (2V ~ 36V, ±1V ~ 18V)

All three substitute parts are ROHS3 compliant and operate across the full industrial temperature range (-40°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q1: Can the LM2901QDRQ1 directly replace the LM2901DRCT without PCB modifications?

A: Yes. The LM2901QDRQ1 maintains identical 14-SOIC package dimensions (0.154", 3.90mm width), pin configuration, and functional specifications. No PCB layout modifications are required. The extended supply voltage range (2V ~ 36V versus 2V ~ 30V) provides additional design flexibility without affecting existing circuits.

Q2: What is the difference between open-collector output and CMOS/TTL output in the LM2901QS14-13?

A: The LM2901DRCT and LM2901QDRQ1 feature open-collector outputs, which require external pull-up resistors and allow wire-OR configuration. The LM2901QS14-13 offers CMOS/TTL output compatibility, providing integrated output drivers. Selection depends on circuit design requirements; open-collector outputs are preferred for wire-OR applications, while CMOS/TTL outputs simplify interface design.

Q3: Why does the LM2901AS14-13 have a lower input offset voltage specification (2mV @ 5V)?

A: The LM2901AS14-13 represents a higher-precision variant from Diodes Incorporated. The improved input offset voltage specification (2mV @ 5V versus 7mV @ 5V) indicates tighter manufacturing tolerances and superior input stage matching. This specification difference is provided by the manufacturer and reflects component-level performance characteristics.

Q4: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL ratings indicate moisture absorption sensitivity during storage and handling. MSL 1 (Unlimited) parts have no moisture sensitivity restrictions and can be stored indefinitely at room temperature. MSL 3 (168 Hours) parts require controlled storage conditions and must be used within 168 hours of package opening. The LM2901AS14-13 carries MSL 3 rating, requiring adherence to moisture control procedures during assembly.

Q5: Are all substitute parts suitable for automotive applications?

A: Only the LM2901QDRQ1 and LM2901QS14-13 carry automotive-grade qualification (AEC-Q100). The LM2901AS14-13 does not specify automotive qualification. For automotive applications, select either LM2901QDRQ1 or LM2901QS14-13.

Q6: What is the difference in output current capability between substitute parts?

A: The LM2901QDRQ1 specifies 20mA typical output current, while both the LM2901DRCT and LM2901AS14-13 specify 16mA @ 5V. The LM2901QS14-13 specifies 16mA @ 5V. All parts meet or exceed the original 16mA specification, ensuring compatibility with existing load requirements.

Q7: Can the LM2901DRCT be used interchangeably with LM2901QDRQ1 in new designs?

A: No. The LM2901DRCT is Last Time Buy status and no longer manufactured. New designs must utilize one of the three active substitute parts: LM2901QDRQ1, LM2901AS14-13, or LM2901QS14-13. The LM2901QDRQ1 is the manufacturer-recommended choice for design continuity.

Q8: What packaging options are available for these substitute parts?

A: All substitute parts are supplied in 14-SOIC surface-mount packages. The LM2901QDRQ1 is available in Cut Tape (CT) and Digi-Reel® packaging. The LM2901AS14-13 and LM2901QS14-13 are available in Tape & Reel (TR) packaging. Packaging selection depends on production volume and assembly equipment compatibility.