Details, datasheet, quote on part number: STLC7549
PartSTLC7549
Category
Description
CompanyN.A.
DatasheetDownload STLC7549 datasheet
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Features, Applications

STEREO AUDIO CODEC WITH CD QUALITY NOISE AND DISTORTION - ADC AND DAC PROGRAMMABLES AMPLING RATES - 16-BIT RESOLUTION > 85dB DYNAMIC RANGE QUADRAPHONIC MODE FOR SURROUND SOUND APPLICATION (STEREO AUDIO CODEC PLUS BOTH MODEM AND TELEPHONY MONOPHONIC CODECS) MONOPHONIC CODEC FOR MODEM APPLICATIONS - ADC AND DAC SAMPLING RATES - 16-BIT RESOLUTION > 90dB DYNAMIC RANGE (MODEM MODE) - V.34BIS MODEM PERFORMANCE CAPABILITY SECOND MONOPHONIC CODEC FOR LOCAL HANDSET, ANSWERING MACHINE OR 2nd MODEM APPLICATIONS - ADC AND DAC SAMPLING RATES - 16-BIT RESOLUTION > 85dB DYNAMIC RANGE (MODEM MODE) EXTENSIVE AUDIO SWITCHING AND GAIN CONTROLS FOR AUDIO ROUTING - A SUPERSET FEATURE LIST OF SOUNDBLASTERPRO AND MPC-2 SPECIFICATIONS - 3 STEREO LINE LEVEL INPUTS (LINE IN, CDROM, AUX) - 2 MONOPHONIC MICROPHONE INPUTS (DESKTOP AND HEADSET) - 2 PAIR OF STEREO OUTPUTS (MAIN AND AUXILLARY) - MONOPHONIC INPUT AND OUTPUT - PROGRAMMABLE GAIN/ATTENUATION/ MUTE BLOCKSONALLINPUTSANDOUTPUTS INDEPENDENT CAPTURE AND PLAYBACK MIXING CAPABILITY MODEM CODEC HAS GAIN/ATTENUATION BLOCKS - INPUTS AND OUTPUTS CAN OPERATE IN A BALANCED OR UNBALANCED CONFIGURATION - DAC OUTPUT CAN OPTIONALLY BE USED AS REAR CHANNEL SOUND EFFECTS FOR GAMES

x 1.4mm) (Full Thin Plastic Quad Flat Pack)

2nd MODEM CODEC HAS GAIN/ATTENUATION/ MUTE BLOCKS ON INPUT AND OUTPUT - ADC CAN SELECT HANDSET MOUTHPIECE OR DESKTOP/HEADSET MICROPHONE - DAC OUTPUT CAN OPTIONALLY BE USED AS REAR CHANNEL SOUND EFFECTS FOR GAMES - DAC OUTPUT CAN OPTIONALLY BE USED TO DRIVE THE HEADSET EARPIECE - THIS CODEC CAN ALSO BE USED FOR A SECOND MODEM PORT CONTROL PINS TO CONTROL LINE OUT ATTENUATORS BY PUSHBUTTONS UP/DOWN/MUTE CONTROL PIN TO CONTROL LINE OUT ATTENUATORS BY A DC-VOLTAGE POTENTIOMETER 8 GENERAL PURPOSE DIGITAL I/O LINES FOR CONTROL OF MISCELLANEOUS TELEPHONE CIRCUITS EXTENSIVE POWER DOWN OPTIONS WITH LOW-POWER AUDIO LOOPTHRU MODE DUAL SYNCHRONOUS SERIAL PORTS FOR INDEPENDENT AUDIO AND COMMUNICATION WITH 64 BITS PER FRAME DIGITAL POWER SUPPLY TO 5.0V ANALOG POWER SUPPLY OF 5V AVAILABLE IN 64 PIN TQFP PACKAGE

DESCRIPTION The STLC7549 codec is a single chip multimedia codec that contains multiple 16-bit sigma-delta codecs and a wide assortment of audio switching and gain controls.

OVERVIEW STLC7549 is the analog componentof 2-chip PC audio solution for multimedia application. It is well suited for CD-Quality Audio/Telephony and DSVD V.34bis Modem/Fax application. Outstanding performances are obtained thanks to 16-bit sigmadelta a rchitect ure, giving dynamic rang es exceeding 9OdB for modem and 85dB for audio with programmablesample frequency to 48kHz. With powerdown and to 5V digital supply modes, it integratescomplete analog-front-endcircuits a 64 pins TQFP package reducing power consumption, size and circuitry complexity. Figure 1 gives the simplified diagram of the STLC7549 internal structure. It presents three different pans - Audio, Telephony and Modem - that offers real simultaneous audio and communication features,with dual serial port and dual programmable sample rate for more flexibility and efficiency.In that way, previous modem digital controler or DSP software can be used without having to adapt it for additional audio part. Each part provide a DAC channel and an ADC that respectively convert data from digital interface to analog signals, and convert analog input signals to digital data to the digitalinterface. ADC digitalpaths to DAC digital paths loopback is supported. STLC7549 audio part gives full duplex stereo channels that, thanks to a dual set of mixer, allows independent analog mixing and recording mixing with DAC channelof all the following audio sources: - Threemainstereoinput lines fromCD player,MPEG audio signal, VCR recording, FM Synthesizer and MIDI application - A stereo microphone input from desktop and/or headset, including a selectable +2OdB pre-amplifier (MICL and MICR) - A mono input for PC speaker (MONO-IN) Each sources can be amplified, attenuated and mu ted ind ependently. Two ste re o out puts (LOUT1,LOUT2,ROUT1 and ROUT2) provide the resulting audio mixing to two stereo lineout through a volume control block directly set by pushbuttons, DC potentiometer pins, or by serial port register command. An additional summer provideto thePC speaker (MONO-OUT) a mixing of the stereo outputs with MONO-IN. STLC7549 Telephony part provide a mono mixing of two mono inputs from second phone line and headset (TP2Rx and TP2Tx) with stereo microphone line to the ADC channel. Input can also be used for mixing music or message in answering machine or hold mode application. DAC channel drive three mono outputs to phone speaker, headset speakers,second line modem, fax or reargame channel (HandTxl,HandTx2,HandTx3). STLC7549 Modem part include a differentialmono input and output line, and an additional output line. It is targeted for V.34bis standard. Telephony and Modem parts are independent of audio parts thanks to a second sampling clock and serial port. However, all clocks can also be controlled from the audio Master clock (MCLKA), providing a quadraphonic mode for surround and 3-D sound applications. Height General Programmable Inputs Outputs are provided for ring detect, LEDs and pushbuttons control, audio or phone source presence. With full duplex mixing features, quadraphony mode, independent audio and communication serial ports and programmable sample rates, is a simultaneous Modem/Telephony/Stereo Audio Codec well suited for PC multimedia applications.

8 GPIO[7:0] (Pins 49) 39 VOL_UP REGISTERS 38 VOL_DOWN 37 VOL_MUTE 36 DC_POT LINE 1 (LINE IN) 15 LINE 2 (AUX) to +6dB/2dB Mute A1 M

2 G1 LINE 3 (CD, VIDEO) 2 +37dB/2.5dB MICR (Pin P G2 MICL (Pin 1 A3 MONO_IN 6 (PC BEEP) -30dB/10dB M MONO_OUT OUT1 (LINE_OUT) (Pins 1-3) OUT2 (HP_OUT) (Pins



 

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