STAC9744
STAC9744 is Stereo Codec manufactured by SigmaTel.
DESCRIPTION
:
Sigma Tel’s STAC9744 is a general-purpose 18-bit stereo, full duplex, audio codec that conforms to the analog ponent specification of AC'97 (Audio Codec 97 ponent Specification Rev. 2.1). The STAC9744 incorporates Sigma Tel’s proprietary Sigma-Delta technology to achieve a DAC SNR in excess of 95d B and line through SNR of greater than 100d B. The DACs, ADCs, and mixer are integrated with analog I/Os, which include four analog line-level stereo inputs, two analog line-level mono inputs, two stereo outputs, and one mono output channel. Also included are Sigma Tel’s 3D stereo enhancement (SS3D), Variable Sample Rate Converters, and an extra true line-level out for headphones or speaker amplifiers. The STAC9744 may be used as a secondary codec, with the STAC9704/07/21/23 or a 4-channel STAC9708 as the primary, in multiple codec configurations conforming to the AC'97 Rev. 2.1 specification. This configuration can provide up to six-channel output, delivering AC-3 playback for DVD applications. The STAC9744 municates via the five-wire AC-Link interface with any AC-Link capable controller or advanced core logic chip-set. Packaged in an AC'97 pliant 48-pin TQFP, the STAC9744 can be placed on motherboards, daughter boards, add-on cards or docking stations.
FEATURES
:
- High performance Σ∆ technology
- Energy saving power down modes
- 18-bit full duplex stereo ADC, DACs
- AC-Link protocol pliance
- Variable Sample Rate architecture
- Windows Soft Audio Drivers Available
- Pin patible with the STAC9700/21
- Sigma Tel Surround (SS3D) Stereo
Enhancement
- EAPD
- External Amplifier Power Down Control
- Multi-Codec option (Intel AC'97 rev 2.1)
- Six analog line-level inputs
- 48-pin TQFP
- LINE to LINE SNR 103d B
- DAC SNR 95 d B
- Simplified AMR MDC and MB operation
- +3.3V and +5V operation
4/7/2000
Sigma Tel, Inc.
Advance Data Sheet
ORDERING INFORMATION:
Part Number
STAC9744T STAC9745T
PACKAGE
48-pin TQFP 7mm x 7mm x 1.4mm 48-pin TQFP 7mm x 7mm x...
