LM49321RL/NOPB

Audio Amplifiers Overview

The LM49321RL/NOPB is a mono analog and digital input Class-AB audio amplifier manufactured by Texas Instruments. It integrates a 520-mW speaker driver and a separate 36-mW headphone amplifier within a single package. The device supports both analog and digital audio inputs, offering flexibility in system design. It operates within an ambient temperature range of -40°C to 85°C and is housed in a compact 36-pin DSBGA (YPG) surface-mount package.

Audio Amplifiers Feature Summary

• Integrates a high-power mono Class-AB amplifier for speaker output alongside a dedicated low-power headphone amplifier.

Audio Amplifiers Applications

• Portable audio devices requiring integrated speaker and headphone amplification
• Mobile phones with mono speaker output capabilities
• Digital audio subsystems utilizing digital input interfaces

Audio Amplifiers Procurement Notes

Verify the obsolete lifecycle status before procurement planning. Confirm the specific 36-pin DSBGA (YPG) package requirements against PCB layout constraints. Ensure compatibility with existing analog and digital input signal levels. Check for alternative components if long-term supply continuity is required due to end-of-life designation.

Audio Amplifiers Selection Notes

Select this component when a mono Class-AB topology is required for both speaker and headphone outputs in a space-constrained design. It is suitable for applications needing simultaneous or switched operation between a 520-mW speaker driver and a 36-mW headphone amp. Consider the 36-pin footprint and thermal dissipation characteristics during the initial hardware architecture phase.

Audio Amplifiers Part Context

This part belongs to the LM49321 family of audio amplifiers from Texas Instruments. It is designed as a complete audio sub-system solution, combining power amplification stages with support for digital audio interfaces. The NOPB suffix indicates lead-free and roHS compliance, aligning with environmental standards for modern electronic manufacturing.

Audio Amplifiers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Due to the obsolete lifecycle status, direct replacements should be evaluated based on pin compatibility and electrical specifications rather than manufacturer cross-reference lists.