Part # LM4543 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4543 AC 97 Codec with together National 3D Sound together

Part Details:

LM4543 February 1999 AC LM4543 97 AC 97 Codec with National 3D Sound Codec General Description Key Specifications The LM4543 is an audio codec for PC systems which per- n Analog Mixer Dynamic Range 95dB (typ) forms the analog-intensive function of the Analog Codec 97Rev 1.03 architecture. Using 18-Bit A/D and D/A convert- n D/A Dynamic Range 89dB (typ) ers, the LM4543 provides 90dB of dynamic range. n A/D Dynamic Range 90dB (typ) with The LM4543 was designed specifically to provide a highquality audio path and provide all analog functionality in a PC Features audio system. It features full duplex stereo A/D s and D/A s National n Audio Codec 97 compliant and an analog mixer with 4 stereo and 3 mono inputs, each n Stereo 18-Bit A/D s and D/A s with 128X of which has separate gain, attenuation and mute control. In oversampling addition, the LM4543 provides National s 3D Sound stereo n National s 3D Sound circuitry enhancement technology. n Power management support The LM4543 features AC-Link, a synchronous, fixed rate se- n Digital Interface 3V and 5V compliant rial bus for connection to the digital AC 97 Controller. The 3D separation of the analog and digital functions of the AC 97architecture allows for system design flexibility and in- Applications Sound creased overall performance. n Desktop PC Audio Systems n Portable PC Audio Systems n Mobile PC Audio Solutions Block Diagram DS100907-1 FIGURE 1. LM4543 Block Diagram © 1999 National Semiconductor Corporation DS100907 Absolute Maximum Ratings (Note 3) TQFP Package If Military/Aerospace specified devices are required, Vapor Phase (60 sec.) 215°C

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LM4543.pdf Datasheet