[IDT]

Description
The 92HD91 single-chip audio system is a low power optimized, high fidelity, 4-channel audio codec with integrated speaker amplifier, capless headphone amplifier, and low drop out voltage regulator.

FEATUREs
• 4 Channels (2 stereo DACs and 2 stereo ADCs) with 24-bit resolution
    • Supports full-duplex stereo audio and simultaneous VoIP
    • Provides a mono output
    • 2.1 audio crossover support
• 2W/channel Class-D stereo BTL speaker amplifier @ 4 ohms and 5V
    • 10 band hardware parametric equalizer
    • Hardware compressor limiter
• Capless headphone amplifier with charge pump/LDO
• Combo Jack Support allowing for dual-function headphone and headset detection
• Speaker Protection
    • Dedicated BTL high pass filter
    • Mono bandpass filter
• Full HDA015-B low power support
• Internal digital core LDO voltage regulator
• Microsoft WLP desktop premium logo compliant
• Dual SPDIF for WLP compliant support of simultaneous HDMI and SPDIF output
• Support for 1.5V and 3.3V HDA signaling
• Two digital microphone inputs (mono, stereo, or quad microphones)
• Microphone Mute Input (on WB revisions and beyond)
• High performance analog mixer
• 2 adjustable VREF Out pins for analog microphone bias
• 6 analog ports with port presence detect (5 single ended, 1 BTL)
• Analog and digital PC Beep support
• AUX Audio Mode for playback and record
• 48-pad QFN RoHS packages