LM2901QDRDL Equivalent & Substitute Parts

Part Overview

The LM2901QDRDL is a general-purpose comparator integrated circuit manufactured by Texas Instruments, featuring four independent differential comparators with open-collector outputs in a 14-SOIC surface-mount package. This device is designed for voltage comparison applications across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply). The product maintains Active status with 10,100 units currently in stock.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

LM2901QDRDL

Texas InstrumentsIn Stock: 10128LM2901QDRDL Datasheet

Current PartRFQ

LM2901QDRQ1

Texas InstrumentsIn Stock: 1384LM2901QDRQ1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2901QDRDL is determined by strict alignment of the following critical parameters:

Mechanical Compatibility:

• Package type: 14-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Pin count and footprint equivalence

Electrical Compatibility:

• Number of elements: 4 independent comparators
• Output type: Open-Collector configuration
• Supply voltage range: Minimum 2V single supply or ±1V dual supply capability
• Input offset voltage: Maximum 7mV @ 5V
• Input bias current: Maximum 0.25µA @ 5V
• Output current capability: Minimum 16mA typical
• Quiescent current: Maximum 2.5mA
• Operating temperature range: -40°C to 125°C

Compliance & Status:

• Product status: Active
• RoHS3 compliance required
• MSL rating: 1 (Unlimited)

The LM2901QDRQ1 meets all substitution criteria through identical mechanical packaging, equivalent electrical specifications, and matching functional architecture.

Parameter Comparison

Engineering Selection Recommendations

LM2901QDRQ1 as Direct Substitute:

The LM2901QDRQ1 is a qualified substitute for the LM2901QDRDL based on the following engineering criteria:

1. Mechanical Equivalence: Both devices utilize identical 14-SOIC packaging with matching pin configurations and footprints, enabling direct PCB-level replacement without layout modification.

2. Electrical Equivalence: Core electrical parameters—input offset voltage, input bias current, quiescent current, and operating temperature range—are identical. The substitute device demonstrates enhanced supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and increased output current capability (20mA typical versus 16mA), both of which provide operational margin without introducing incompatibility.

3. Compliance Status: Both parts maintain Active product status, ROHS3 compliance, and MSL 1 (Unlimited) rating, ensuring equivalent environmental and handling requirements.

4. Automotive Qualification: The LM2901QDRQ1 carries AEC-Q100 automotive qualification, indicating enhanced reliability screening and process controls. This qualification does not restrict use in commercial applications and represents a higher assurance level.

5. Functional Architecture: Both devices contain four independent open-collector comparators with identical functional specifications, supporting equivalent circuit implementations.

Selection Basis:

Choose LM2901QDRQ1 when supply voltage requirements exceed 30V single supply or ±15V dual supply, or when output current demands exceed 16mA. For applications within the original LM2901QDRDL specification envelope, both parts are functionally interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the LM2901QDRQ1 replace the LM2901QDRDL in all applications?

A: Yes. The LM2901QDRQ1 meets or exceeds all electrical and mechanical specifications of the LM2901QDRDL. The substitute device provides enhanced supply voltage range and output current capability, making it suitable for all applications designed for the original part.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging designation (QDRDL versus QDRQ1) and automotive qualification. The LM2901QDRQ1 includes AEC-Q100 automotive-grade qualification and is supplied in Cut Tape (CT) and Digi-Reel® packaging, whereas the LM2901QDRDL is commercial-grade. Electrical performance and package dimensions are equivalent.

Q: Are the pin configurations identical?

A: Yes. Both devices use the 14-SOIC package with identical pin assignments. Direct PCB substitution is possible without schematic or layout changes.

Q: What does "open-collector output" mean for substitution purposes?

A: Open-collector output architecture is identical in both parts. This configuration requires external pull-up resistors to establish output voltage levels. Substitution does not alter this requirement or circuit behavior.

Q: Does the automotive qualification of the LM2901QDRQ1 affect its use in commercial applications?

A: No. Automotive qualification represents additional quality and reliability screening. Commercial applications benefit from this enhanced qualification without restriction or penalty.

Q: What is the significance of the supply voltage range difference (30V versus 36V)?

A: The LM2901QDRQ1 supports higher maximum supply voltage (36V single supply versus 30V). This provides operational margin for applications with elevated supply voltages. For designs operating within 30V, both parts are equivalent.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. Identical package, pin configuration, and core electrical specifications enable direct substitution. No circuit redesign or PCB modification is required.

Q: What does MSL 1 (Unlimited) mean for handling?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture-controlled storage or baking procedures before soldering. Both parts share this classification.