W6811 Datasheet | Winbond

DESCRIPTION The W6811 is a general-purpose single channel PCM CODEC with pin-selectable -Law or A-Law panding. The device is pliant with the ITU G.712 specification. It operates off of separated analog (5V) and digital (3V) power supplies and is available in 24-pin PDIP, SOG, SSOP, and TSSOP package options. Functions performed include digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems. The filters are pliant with ITU G.712 specification. W6811 performance is specified over the industrial temperature range of - 40°C to +85°C. The W6811 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300Ω loads differentially up to a level of 6.3V peak-to-peak. The analog section is fully differential, reducing noise and improving the power supply rejection ratio. The data transfer protocol supports both long-frame and short-frame synchronous munications for PCM applications, and IDL and GCI munications for ISDN applications. W6811 accepts seven master clock rates between 256 k Hz and 4.096 MHz, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock. 2. FEATURES - - - - - - - - - - - Power supply: - Analog 4.5 - 5.5V - Digital 2.7 - 3.3V Typical power dissipation of 25 m W, power-down mode of 0.5 W Fully-differential analog circuit design On-chip precision reference of 1.575 V for a 0 d Bm TLP at 600 Ω Push-pull power amplifiers with external gain adjustment with 300 Ω load capability Seven master clock rates of 256 k Hz to 4.096 MHz Pin-selectable -Law and A-Law panding (pliant with ITU G.711) CODEC A/D and D/A filtering pliant with ITU G.712 Industrial temperature range (- 40°C to +85°C) Four packages: 24-pin PDIP, SOG, SSOP, and TSSOP Pb-Free / Ro HS package options available APPLICATIONS - - - - - - - - - - - Digital Telephone Systems Central Office Equipment (Gateways, Switches, Routers) PBX Systems (Gateways, Switches)...