The Si3000 is a complete voice band audio codec solution that offers high integration by incorporating programmable input and output gain/ attenuation, a microphone bias circuit, handset hybrid circuit, and an output drive for 32 headphones. The Si3000 can be connected directly to the Si3034, Si3035, and Si3044 ISOcap North American and international DAA chipsets through its daisy-chaining serial interface. The device operates from a single 3.3 to 5 V power supply and is available in a 16-pin small outline package (SOIC).