DESCRIPTION

· The STAC9750/9751 are full-duplex stereo AC'97 CODECs compliant with AC'97 Rev 2.2.

· They feature 18-bit ADCs and 20-bit DACs with IDT's proprietary Σ∆ technology.

· Integrated analog I/Os include four stereo inputs, two mono inputs, two stereo outputs, and one mono output.

· Supports SPDIF output and headphone drive without external amplification.

· Can be used as a secondary CODEC in multi-CODEC configurations for six-channel AC-3 playback.

· Communicates via the five-wire AC-Link for flexible audio system design.

· Packaged in a 48-pin TQFP for motherboard, daughter board, PCI, AMR, CNR, or ACR card applications.

FEATURES

· Full-duplex stereo operation with 18-bit ADCs and 20-bit DACs.

· AC'97 Rev 2.2 compliant with high-performance Σ∆ technology.

· SPDIF output and crystal elimination circuit.

· Integrated headphone amplifier and independent sample rates for ADCs & DACs.

· 20dB or 30dB microphone boost capability and 90dB SNR LINE-LINE.

· 5-wire AC-Link protocol compliance and digital-ready architecture.

· General Purpose I/O and IDT Surround (SS3D) stereo enhancement.

· Energy-saving dynamic power modes and pin compatibility with STAC9700/21/56/66.

· Analog power supply options: +3.3V (STAC9751) and +5V (STAC9750).

APPLICATIONS

· Suitable for motherboard, daughter board, PCI, AMR, CNR, or ACR card designs.

· Ideal for modern PC systems requiring digital input/output capability.

· Supports DVD applications with true six-channel AC-3 playback in multi-CODEC configurations.

· Advanced architectural implementations with built-in volume controls and digital mixing capabilities.

· Reference designs available for MB, CNR, ACR, and PCI applications.