LP2901DRG4 Equivalent & Substitute Parts

Part Overview

The LP2901DRG4 is a general-purpose CMOS comparator IC with four independent comparator elements in a 14-SOIC surface-mount package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The LP2901 series provides a direct functional replacement path through active and last-time-buy alternatives that maintain identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Number of Elements	4
Output Type	CMOS, MOS, Open-Collector
Voltage Supply Range	3V ~ 30V (Single/Dual)
Input Offset Voltage (Max)	5mV @ 30V
Input Bias Current (Max)	0.025µA @ 5V
Output Current (Typ)	30mA @ 5V
Quiescent Current (Max)	100µA
Operating Temperature Range	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LP2901DRG4 is determined by strict equivalence across the following parameters:

Functional Elements: All substitute parts contain 4 independent comparator elements
Output Configuration: CMOS, MOS, Open-Collector output type maintained across all alternatives
Electrical Performance: Identical voltage supply range (3V ~ 30V), input offset voltage (5mV @ 30V), input bias current (0.025µA @ 5V), output current (30mA @ 5V), and quiescent current (100µA)
Temperature Rating: All parts operate across -40°C ~ 85°C
Package Compatibility: All substitute parts use 14-SOIC (0.154", 3.90mm Width) surface-mount packaging
Compliance: All parts maintain ROHS3 compliance and MSL 1 rating

The LP2901DRG4 (obsolete, Cut Tape packaging) can be directly replaced by LP2901DR (active, Cut Tape & Digi-Reel), LP2901IDRG4Q1 (last-time-buy, Tape & Reel, automotive-qualified), or LP2901IDRQ1 (active, Cut Tape, automotive-qualified).

Parameter Comparison

Parameter	LP2901DRG4	LP2901DR	LP2901IDRG4Q1	LP2901IDRQ1
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Last Time Buy	Active
Number of Elements	4	4	4	4
Output Type	CMOS, MOS, Open-Collector	CMOS, MOS, Open-Collector	CMOS, MOS, Open-Collector	CMOS, MOS, Open-Collector
Voltage Supply Range	3V ~ 30V	3V ~ 30V	3V ~ 30V	3V ~ 30V
Input Offset Voltage (Max)	5mV @ 30V	5mV @ 30V	5mV @ 30V	5mV @ 30V
Input Bias Current (Max)	0.025µA @ 5V	0.025µA @ 5V	0.025µA @ 5V	0.025µA @ 5V
Output Current (Typ)	30mA @ 5V	30mA @ 5V	30mA @ 5V	30mA @ 5V
Quiescent Current (Max)	100µA	100µA	100µA	100µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Commercial	Commercial	Automotive	Automotive
Qualification	—	—	AEC-Q100	AEC-Q100
Packaging Format	Cut Tape (CT)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

Primary Recommendation: LP2901DR

The LP2901DR is the direct functional equivalent with active product status. This part maintains identical electrical specifications and 14-SOIC packaging. The expanded packaging options (Cut Tape and Digi-Reel) provide supply flexibility for both prototype and production volumes.

Automotive Applications: LP2901IDRQ1 or LP2901IDRG4Q1

For applications requiring automotive-grade components, both LP2901IDRQ1 and LP2901IDRG4Q1 are AEC-Q100 qualified alternatives. LP2901IDRQ1 is recommended for new designs due to active product status. LP2901IDRG4Q1 remains available as a last-time-buy option.

Supply Continuity Consideration

LP2901IDRG4Q1 carries last-time-buy status, indicating limited future availability. For long-term production requirements, LP2901DR or LP2901IDRQ1 are preferred to ensure sustained supply.

Frequently Asked Questions (FAQ)

Q: Can LP2901DR be used as a direct replacement for LP2901DRG4?

A: Yes. Both parts are electrically and mechanically identical. The LP2901DR is the active production equivalent with expanded packaging options.

Q: What is the difference between commercial and automotive-grade LP2901 parts?

A: Automotive-grade parts (LP2901IDRQ1, LP2901IDRG4Q1) carry AEC-Q100 qualification and are tested to automotive reliability standards. Commercial-grade parts (LP2901DRG4, LP2901DR) meet standard industrial specifications. Selection depends on application requirements.

Q: Are there packaging differences between substitute parts?

A: Yes. LP2901DR offers Cut Tape and Digi-Reel packaging. LP2901IDRG4Q1 uses Tape & Reel format. LP2901IDRQ1 uses Cut Tape. All maintain identical 14-SOIC physical dimensions and pin configuration.

Q: Why is LP2901DRG4 marked as obsolete?

A: Obsolete status indicates the part is no longer in active production. Active equivalents (LP2901DR, LP2901IDRQ1) provide continued supply and support.

Q: Can I mix LP2901 variants in the same design?

A: Yes. All LP2901 variants listed maintain identical electrical performance and 14-SOIC packaging, allowing interchangeable use within the same circuit design.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive electronics reliability qualification standard. Parts meeting this standard have undergone additional testing for temperature cycling, humidity, and stress conditions required for automotive applications.

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