LM4893MM/NOPB Equivalent & Substitute Parts

Part Overview

The LM4893MM/NOPB is a Class AB audio amplifier IC manufactured by Texas Instruments, designed for mono audio applications with 1.1W output power at 8Ohm load impedance. This device is part of the Boomer® series and operates across a 2.2V to 5.5V supply voltage range. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain functional equivalence in packaging, electrical performance envelope, and thermal characteristics to ensure direct replacement capability.

Substiute Parts

LM4893MM/NOPB

Texas InstrumentsIn Stock: 978LM4893MM/NOPB Datasheet

Current PartRFQ

LM4898MM/NOPB

Texas InstrumentsIn Stock: 2224LM4898MM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM4893MM/NOPB is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Amplifier topology: Class AB configuration
• Channel configuration: 1-Channel (Mono) output
• Package type: 10-VSSOP (10-TFSOP, 10-MSOP form factor)
• Mounting technology: Surface Mount
• Supply voltage range: Must encompass or overlap with 2.2V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C (TA)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

Performance Parameters:

• Output power capability at specified load impedances
• Feature set (Depop, Shutdown, Thermal Protection)
• Input configuration (single-ended or differential)

The LM4898MM/NOPB qualifies as a manufacturer-recommended substitute based on identical package geometry, matching thermal operating range, equivalent supply voltage specifications, and compatible feature integration within the Boomer® series platform.

Parameter Comparison

Engineering Selection Recommendations

The LM4898MM/NOPB is the manufacturer-recommended substitute for the obsolete LM4893MM/NOPB. Selection of this substitute is supported by the following engineering factors:

Product Status Alignment: The LM4898MM/NOPB maintains Active product status, ensuring continued manufacturing support, availability, and compliance documentation from Texas Instruments. The LM4893MM/NOPB is classified as Obsolete, creating supply chain risk and limiting access to updated technical resources.

Regulatory Compliance: Both devices maintain identical ROHS3 Compliance and REACH Unaffected status, ensuring equivalent environmental and regulatory qualification for applications subject to these standards.

Packaging and Thermal Characteristics: Identical 10-VSSOP package geometry and -40°C to 85°C operating temperature range enable direct PCB-level substitution without layout modification or thermal management redesign.

Supply Voltage Compatibility: The LM4898MM/NOPB supply voltage range (2.4V ~ 5.5V) overlaps the LM4893MM/NOPB specification (2.2V ~ 5.5V) across the practical operating envelope for most audio applications. The 0.2V minimum voltage offset does not create functional incompatibility in standard 3.3V or 5V supply configurations.

Enhanced Feature Integration: The LM4898MM/NOPB incorporates Differential Inputs in addition to the base feature set (Depop, Shutdown, Thermal Protection), providing design flexibility without functional degradation for single-ended input applications.

Frequently Asked Questions (FAQ)

Q: Can the LM4898MM/NOPB directly replace the LM4893MM/NOPB on existing PCBs?

A: Yes. Both devices use identical 10-VSSOP packaging with matching pinout and footprint geometry. No PCB layout modification is required for direct substitution.

Q: What is the difference in output power between these devices?

A: The LM4893MM/NOPB delivers 1.1W at 8Ohm load impedance. The LM4898MM/NOPB delivers 1.4W at 4Ohm load impedance. Output power varies with load impedance; direct comparison requires measurement at identical load conditions. Both devices operate within the Class AB amplifier topology and share the same supply voltage range for practical applications.

Q: Are there supply voltage compatibility concerns?

A: The LM4898MM/NOPB minimum supply voltage is 2.4V, compared to 2.2V for the LM4893MM/NOPB. In applications using 3.3V or 5V supply rails, this 0.2V difference does not create functional incompatibility. Applications operating below 2.4V require verification against the LM4898MM/NOPB datasheet.

Q: What does the Differential Inputs feature on the LM4898MM/NOPB provide?

A: Differential input capability allows the LM4898MM/NOPB to accept balanced audio signals. Applications using single-ended inputs operate identically to the LM4893MM/NOPB; the differential input feature does not degrade single-ended performance.

Q: Is the LM4898MM/NOPB available in the same packaging options?

A: Yes. Both devices are supplied in 10-TFSOP and 10-MSOP packages with 0.118" (3.00mm) width. The LM4898MM/NOPB is available in Tape & Reel (TR) packaging format, supporting automated assembly processes.

Q: What is the product status difference, and why does it matter?

A: The LM4893MM/NOPB is classified as Obsolete, indicating end-of-life status and limited future availability. The LM4898MM/NOPB maintains Active status, ensuring continued manufacturing, technical support, and compliance documentation from Texas Instruments. For new designs and production continuity, the Active substitute is the appropriate selection.

Q: Are thermal protection and shutdown features identical?

A: Both devices include Thermal Protection and Shutdown features. The LM4898MM/NOPB adds Depop functionality alongside these core protection mechanisms, matching the LM4893MM/NOPB feature set. Depop (depolarization pop suppression) reduces audible transients during power sequencing.