LM4550BVH AC '97 Audio Codec Equivalent & Substitute Parts

Part Overview

The LM4550BVH is a Texas Instruments AC '97 audio codec interface component designed for audio signal processing applications. It integrates analog-to-digital and digital-to-analog conversion with AC '97 serial interface compatibility in a 48-pin LQFP surface mount package. The main part number LM4550BVH carries a "Not For New Designs" product status, making identification of functionally equivalent alternatives essential for ongoing production and design continuity. The LM4550BVH/NOPB variant provides an active production alternative with identical electrical and mechanical specifications.

Substiute Parts

LM4550BVH

Texas InstrumentsIn Stock: 5864LM4550BVH Datasheet

Current PartRFQ

LM4550BVH/NOPB

Texas InstrumentsIn Stock: 2132LM4550BVH/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM4550BVH is determined by strict equivalence across the following critical parameters:

• AC '97 serial interface protocol compatibility
• 18-bit resolution with 2 ADC and 2 DAC channels
• Sigma Delta modulation architecture
• Dynamic range specifications: 90 dB (ADC) and 89 dB (DAC)
• Dual supply voltage ranges: 4.2V–5.5V (analog) and 3V–5.5V (digital)
• Operating temperature range: -40°C to 85°C
• 48-LQFP (7x7) surface mount package
• ROHS3 compliance and MSL 3 rating

The LM4550BVH/NOPB is a direct substitute, sharing identical electrical performance, package specifications, and compliance certifications while maintaining active production status.

Parameter Comparison

Engineering Selection Recommendations

The LM4550BVH/NOPB is the direct equivalent for the LM4550BVH. Both parts are manufactured by Texas Instruments and share identical electrical specifications, package geometry, and compliance certifications. The primary distinction is product lifecycle status: LM4550BVH carries "Not For New Designs" designation, while LM4550BVH/NOPB maintains active production status. For applications requiring ongoing component availability and manufacturer support, LM4550BVH/NOPB is the appropriate selection. Both parts meet ROHS3 compliance and REACH unaffected requirements, with identical moisture sensitivity ratings suitable for standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can LM4550BVH/NOPB replace LM4550BVH in existing designs?

A: Yes. The LM4550BVH/NOPB is electrically and mechanically identical to the LM4550BVH. Pin configuration, signal timing, supply voltage requirements, and performance specifications are equivalent. Direct substitution is supported without circuit modification.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix designates "No Plumbum" (lead-free) packaging and indicates the part meets ROHS3 compliance requirements. Both LM4550BVH and LM4550BVH/NOPB are ROHS3 compliant.

Q: Why is LM4550BVH marked "Not For New Designs"?

A: "Not For New Designs" status indicates the manufacturer is transitioning the part to end-of-life. LM4550BVH/NOPB maintains active production status and is recommended for new applications requiring AC '97 audio codec functionality.

Q: Are there differences in package handling or storage?

A: Both parts share identical Moisture Sensitivity Level 3 (168 Hours) ratings. Storage and handling procedures are equivalent. Standard MSL 3 precautions apply to both variants.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. The 48-LQFP (7x7) surface mount package, pin assignments, and electrical characteristics are identical. Assembly equipment settings and reflow profiles require no modification when substituting between these parts.