ALC887 Datasheet – 7.1 Channel Audio Codec – Realtek

This is a kind of audio codec.

Part Number : ALC887, ALC887-GR


Package : LQFP-48 Type

Manufactures : Realtek Semiconductor ( )

See the preview image and the PDF file for more information.


ALC887 audio codec realtek

The ALC887 is a 7.1 Channel High Definition Audio Codec with two independent SPDIF outputs. Featuring eight channels of DAC support 7.1 sound playback, and integrates two stereo ADC that can support a stereo microphone, and feature Acoustic Echo Cancellation (AEC), Beam Forming (BF), and Noise Suppression (NS) for voice applications.  ALC887 is designed not only to meet the premium audio performance requirements in current WLP3.10 (Windows Logo Program), but provides better characteristics for future WLP. That brings user real high fidelity of sound quality.


ALC887 Pinout

ALC887 datasheet pinout
Hardware Features

1. Meets premium audio requirements for Microsoft WLP 3.10
2. Meets stricter performance requirements for future WLP
3. High-performance DACs with 97dB Signal-to-Noise Ratio (SNR), ADCs with 90dB SNR
4. Four stereo DACs (8 channels) support 16/20/24-bit PCM format for 7.1 sound playback.
5. Two stereo ADCs (4 channels) support 16/20/24-bit PCM format recording simultaneously
6. All DACs supports 16/20/24-bit, 44.1k/48k/96k/192kHz sample rate


Software Features

1. Meets Microsoft WLP 3.10 and future WLP audio requirements
2. WaveRT based audio function driver for Windows Vista
3. EAX 1.0 & 2.0 compatible, especially the EAX effect is supported in Windows Vista
4. Direct Sound 3D™ compatible
5. Emulation of 26 sound environments to enhance gaming experience
6. Multi bands of software equalizer and tool are provided
7. Voice Cancellation and Key Shifting effect


Official Homepage :

Reference Site : OS X Realtek ALC887 Onboard Audio ( )

ALC887 Datasheet

ALC887 pdf


PAM8403 Datasheet – 3W, Stereo Audio Amplifier – PAM

This is one of the Stereo Audio Amplifier types.

Part Number : PAM8403, PAM8403QT, PAM8403DT

Function : Filterless 3W Class-D Stereo Audio Amplifier

Package : SOP-16 Type

Manufactures : Power Analog Microelectronics




The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high-quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications.






1. Filterless, Low Quiescent Current and Low EMI
2. Low THD+N
3. Superior Low Noise
4. Efficiency up to 90%
5. Short Circuit Protection
6. Thermal Shutdown
7. Few External Components to Save the Space and Cost


Typical Application


PAM8403 Datasheet