The The W681310 is a single channel PCM CODEC with pin-selectable -Law or A-Law companding according to ITU G.711 and G.712. It can accept master clocks from 256kHz to 4800kHz. The analog section is fully differential, reducing noise and improving the power supply rejection ratio. The analog output is inverted and an on-chip power amplifier is capable of driving 300? loads differentially up to a level of 3.544V peak-to-peak. The device operates off a single +3V power supply and is available in SOP-20, SSOP-20 and TSSOP-20 package options.