Preliminary Product Bulletin Winbond's W681512 Single-Channel CODEC The W681512 single channel voice CODEC is an analog-to-digital and digital-to-analog converter that complies with ITU-T G.712 specifications. The CODEC features complete -Law and A-Law companders (pin selectable) that are designed to comply with ITU-T G.711 specifications. The chip also offers a fully differential analog output. Features In order to provide the cleanest possible signal, the W681512 CODEC complies with the ITU-T G.712 recommendation for analog-to-digital prefilters (also known as anti-aliasing filters) and Digital-to-Analog post filter (signal smoothing filter). * * * * * * * * * * The W681512 CODEC contains an additional analog power amplifier that drives higher current output. The power amplifier gain levels can be adjusted via a set of external resistors to drive an output level of up to 6.3V, peak-to-peak, across a 300- load. * * The PCM interface for the W681512 produces 8bit digital data (-Law or A-Law) at a sampling rate of 8kHz. It can communicate in four different clock formats; short frame sync, long frame sync, IDL and CGI. The W681512 is available in 20-pin SOP and SSOP packaging. * * * * For evaluation and prototyping purposes, a development kit, the W681512DK, is available to provide the system designer with a flexible method for developing and testing an application on a single, standalone platform. W681512 Signal Path VA VAG G + - + Receive Path /A-Cont Control o D/A Converter w + - fC= 3400Hz Hz Smooth Smoothing ngFilter 1 PAO+ PAO - RO + RO - Smooth Smoothing Filter ilter ngF 2 AO /A/A- Control Cont A/D Converter ffCC == 200Hz 200 Hz Pass High High Filt Filter Pas fC== 3400Hz 3400 Hz Ant -Aliasing Ant Aliasi i Filter ng ++ Ant-Aliasi Aliasing Filter * * * * * * * * * * Low power competitive solution System level customization Cross references with the Motorola MC145480 & MC14LC5480 AI+ AI - VoIP, Voice over Networks PBX systems (gateways, switches) PABX/SOHO systems Local loop card SOHO routers Fiber-to-curb equipment Enterprise phones Digital telephone systems ISDN equipment Modems/PC cards Development System * Transmit Path 8 Benefits CODEC Applications PAI 8 Single supply voltage: 4.5 - 5.5V Typical power dissipation: 30mW, power-down of 0.5W Fully-differential analog circuit design Differential outputs On-chip precision reference voltage of 1.575V for a 0dBm TLP @ 600 Push-pull 300 power drivers with external gain adjust 8 kHz sample rate Master clock rates: 256 kHz, 512 kHz, 1536 kHz, 1544 kHz, 2048 kHz, 2560 kHz and 4096 kHz Pin-selectable -Law and A-Law companding (full compliance with ITU-T G.711) CODEC A/D and D/A filter compliance with ITU-T G.712 specifications PCM interface: Short Frame Sync, Long Frame Sync, IDL and GCI timing environments 0 0 Temperature range: Industrial grade (-40 C to 85 C) Packaging: 20-pin SOP The W681512DK is a development kit that can be configured in one of the following two modes: o Stand alone - capable of demo a loop back and prototype a design on a dedicated board space o Back-to-Back -enables full system test between two platforms This document contains advance information and is subject to change. Re Int PC cei erf M ve ace Receive PCM Interface BCLKR FSR PCMR G.712 CODEC G.711 /A - Law Tra Int ns PC erf mitM ace Transmit PCM Interface BCLKT FST PCMT PAO+ PAOPAI RORO RO+ AO AI+ AI/A-Law 512 kHz 256 kHz 8 kHz PUI VDD Power Conditioning VSS 256 kHz, 512 kHz, 1536 kHz, 1544 kHz, 2048 kHz, 2560 kHz & 4096 kHz V AG Voltage reference Pre -Scaler scaler MCLK W681512 Block Diagram Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin Name RO+ ROPAI PAOPAO+ VDD FSR PCMR BCLKR PUI MCLK BCLKT PCMT FST VSS /A-Law AO AIAI+ VAG Functionality Non-Inverting Receive output Inverting Receive output Power amplifier inverted input Inverting Power Amplifier output Non-Inverting Power Amplifier output Positive power supply Receive Frame Sync input PCM input data receive Receive bit clock input Power up indicator System master clock input Transmit bit clock input PCM output data transmit pin Transmit Frame Sync input Ground power supply -Law /A-Law companding select pin Transmit gain output Inverting Transmit input Non-Inverting Transmit input Analog signal reference ground output RO+ ROPAI PAOPAO+ VDD FSR PCMR BCLKR PUI 1 20 2 19 3 18 4 5 6 7 17 SINGLE CHANNEL CODEC 16 15 14 8 13 9 12 10 11 VAG AI+ AIAO /A /A-Law VSS FST PCMT BCLKT MCLK SOP/SSOP To order products or for more information: Winbond Electronics Corporation America 2727 N. First Street San Jose, CA 95134 Tel: 1-800-677-0769 (U.S. Only), 408-943-6666 Fax: 408-544-1789 e-mail: info@winbond-usa.com Web: www.winbond-usa.com Note: For more details on Winbond's W681512 please refer to the product datasheet. Winbond is a registered trademark of Winbond Electronics Corporation. All other trademarks and logos are the properties of their respective owners. Winbond CIDPB1-0901 This document contains advance information and is subject to change.