LM4901MM/NOPB Equivalent & Substitute Parts

Part Overview

The LM4901MM/NOPB is a Class AB audio amplifier IC manufactured by Texas Instruments, designed for mono audio applications with 1.6W output power at 4Ω load impedance. This device operates across a 2V to 5.5V supply voltage range and is housed in a 10-VSSOP surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain identical electrical performance specifications and mechanical compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Type	Class AB
Output Configuration	1-Channel (Mono)
Max Output Power	1.6W @ 4Ω
Supply Voltage Range	2V ~ 5.5V
Features	Depop, Shutdown
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
Package Type	10-VSSOP / 10-TFSOP / 10-MSOP
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM4901MM/NOPB is determined by strict equivalence across the following critical parameters:

Electrical Performance Criteria:

Class AB amplifier topology
1-Channel (Mono) output configuration
1.6W maximum output power at 4Ω load
2V to 5.5V supply voltage range
Depop and Shutdown feature set

Mechanical & Environmental Criteria:

10-VSSOP package designation
Surface mount mounting type
-40°C to 85°C operating temperature range
Moisture Sensitivity Level 1 (Unlimited)

Compliance & Regulatory Criteria:

ROHS3 Compliant status
REACH Unaffected classification
EAR99 ECCN designation

The LM4901MMX/NOPB qualifies as a direct substitute based on complete alignment with all specified parameters. The primary distinction is product status: the LM4901MMX/NOPB maintains Active status, whereas the LM4901MM/NOPB is Obsolete.

Parameter Comparison

Parameter	LM4901MM/NOPB (Main Part)	LM4901MMX/NOPB (Substitute)
Manufacturer	Texas Instruments	Texas Instruments
Series	Boomer®	Boomer®
Product Status	Obsolete	Active
Type	Class AB	Class AB
Output Type	1-Channel (Mono)	1-Channel (Mono)
Max Output Power @ 4Ω	1.6W x 1	1.6W x 1
Supply Voltage Range	2V ~ 5.5V	2V ~ 5.5V
Features	Depop, Shutdown	Depop, Shutdown
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The LM4901MMX/NOPB is the direct equivalent substitute for the obsolete LM4901MM/NOPB. Selection of the LM4901MMX/NOPB is appropriate for the following engineering contexts:

New Design Implementation: The LM4901MMX/NOPB maintains Active product status, ensuring long-term availability and manufacturer support. This part is suitable for new circuit designs requiring Class AB mono audio amplification within the specified electrical and thermal parameters.

Production Continuation: For existing designs currently utilizing the LM4901MM/NOPB, transition to the LM4901MMX/NOPB provides continuity without circuit modification. Electrical performance, package footprint, and thermal characteristics remain identical.

Compliance Assurance: Both parts maintain ROHS3 Compliant and REACH Unaffected status, satisfying regulatory requirements for industrial and consumer applications. MSL Level 1 rating eliminates moisture-related handling constraints during assembly.

Supply Chain Reliability: The LM4901MMX/NOPB is currently in active production with documented inventory availability, reducing procurement risk compared to obsolete part sourcing.

Frequently Asked Questions (FAQ)

Q: Can the LM4901MMX/NOPB be used as a direct replacement for the LM4901MM/NOPB without circuit modification?

A: Yes. The LM4901MMX/NOPB is electrically and mechanically identical to the LM4901MM/NOPB. All electrical parameters, package dimensions, pin configuration, and thermal characteristics are equivalent. No circuit redesign is required.

Q: What is the primary reason for substitution?

A: The LM4901MM/NOPB is classified as Obsolete. The LM4901MMX/NOPB is the Active equivalent, ensuring continued availability and manufacturer support for new and ongoing production applications.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 10-VSSOP package designation with identical physical dimensions: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width). PCB footprints are interchangeable.

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

A: Yes. Both the LM4901MM/NOPB and LM4901MMX/NOPB are ROHS3 Compliant, REACH Unaffected, and carry EAR99 ECCN designation. MSL Level 1 rating applies to both parts.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 85°C (TA). Thermal performance and derating characteristics are identical.

Q: Are there any differences in supply voltage requirements?

A: No. Both parts operate across the identical 2V to 5.5V supply voltage range with equivalent performance across this range.

Q: What output power can be expected from both parts?

A: Both parts deliver 1.6W maximum output power at 4Ω load impedance in Class AB mono configuration. Output power characteristics are identical.

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