LM4867MTE/NOPB Equivalent & Substitute Parts

Part Overview

The LM4867MTE/NOPB is a Class AB stereo amplifier IC manufactured by Texas Instruments, designed for 2-channel stereo headphone applications. This device delivers 3W per channel at 3Ohm load impedance with a supply voltage range of 2V to 5.5V. The part is classified as Obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain functional compatibility in stereo headphone amplification while meeting the same electrical performance specifications and operating conditions.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Type	Class AB
Output Configuration	2-Channel (Stereo) with Stereo Headphones
Max Output Power	3W x 2 @ 3Ohm; 208mW x 2 @ 16Ohm
Supply Voltage Range	2V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package Type	20-PowerTSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LM4867MTE/NOPB is determined by the following critical parameters:

Electrical Compatibility Requirements:

Class AB amplifier topology for stereo headphone output
2-channel stereo configuration with identical channel architecture
Maximum output power of 3W per channel at 3Ohm load
Supply voltage range compatibility (substitute must operate within or encompass the original 2V ~ 5.5V range)
Operating temperature range of -40°C ~ 85°C

Mechanical Compatibility Requirements:

Surface mount technology
PowerTSSOP package family with 0.173" width and 4.40mm width specification
Pin count and footprint compatibility for direct board-level substitution

Compliance Requirements:

ROHS3 compliance
REACH unaffected status
EAR99 export classification

The TPA6011A4PWPR qualifies as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Parameter	LM4867MTE/NOPB	TPA6011A4PWPR	Compatibility
Manufacturer	Texas Instruments	Texas Instruments	Identical
Category	Linear, Amplifiers	Linear, Amplifiers	Identical
Type	Class AB	Class AB	Identical
Output Type	2-Channel (Stereo) with Stereo Headphones	2-Channel (Stereo) with Stereo Headphones	Identical
Max Output Power @ 3Ohm	3W x 2	3W x 2	Identical
Supply Voltage Range	2V ~ 5.5V	4V ~ 5.5V	Substitute range is subset; compatible for 4V ~ 5.5V applications
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package Family	20-PowerTSSOP (0.173", 4.40mm Width)	24-PowerTSSOP (0.173", 4.40mm Width)	Different pin count; same package width and family
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Obsolete	Active	Substitute is active production part

Engineering Selection Recommendations

The TPA6011A4PWPR is the manufacturer-recommended substitute for the obsolete LM4867MTE/NOPB. Selection of this substitute is based on the following engineering criteria:

Electrical Performance Equivalence: Both devices deliver identical output power specifications (3W x 2 @ 3Ohm) and operate across the same temperature range (-40°C ~ 85°C). The substitute maintains Class AB topology and stereo headphone output configuration.

Supply Voltage Consideration: The TPA6011A4PWPR operates within a narrower supply voltage range (4V ~ 5.5V) compared to the original part (2V ~ 5.5V). Applications requiring operation below 4V supply voltage cannot use this substitute without design modification.

Package and Compliance Status: Both parts utilize PowerTSSOP surface mount packages with identical width specifications (0.173", 4.40mm). The substitute features a 24-pin configuration versus the original 20-pin design, requiring PCB layout modification. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence.

Production Continuity: The TPA6011A4PWPR is in active production status with confirmed inventory availability (1336 pcs), providing long-term supply security for new designs and production runs.

Frequently Asked Questions (FAQ)

Q: Can the TPA6011A4PWPR directly replace the LM4867MTE/NOPB on existing PCBs?

A: No. While both devices are PowerTSSOP surface mount packages with identical width, the TPA6011A4PWPR uses a 24-pin configuration versus the LM4867MTE/NOPB 20-pin design. PCB layout and footprint modification is required for substitution.

Q: What is the minimum supply voltage for the TPA6011A4PWPR?

A: The TPA6011A4PWPR operates at 4V minimum supply voltage. The original LM4867MTE/NOPB supports operation down to 2V. Applications requiring 2V to 3.9V supply voltage cannot use this substitute.

Q: Are the output power specifications identical between these parts?

A: Yes. Both devices deliver 3W per channel at 3Ohm load impedance and 208mW per channel at 16Ohm load impedance under identical operating conditions.

Q: What additional features does the TPA6011A4PWPR provide?

A: The TPA6011A4PWPR includes Differential Inputs, Mute, and Volume Control features in addition to the Depop, Input Multiplexer, Shutdown, and Thermal Protection features present in the LM4867MTE/NOPB.

Q: Are both parts RoHS compliant?

A: Yes. Both the LM4867MTE/NOPB and TPA6011A4PWPR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level difference?

A: The LM4867MTE/NOPB has MSL 1 (Unlimited), while the TPA6011A4PWPR has MSL 2 (1 Year). The substitute requires more stringent moisture control during storage and handling.

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