YSS216B

The YSS216B is a kind of an LSI used to carry out digital signal processing for "karaoke" system. With a 256k DRAM connected externally, this LSI executes signal processing such as Key Control, Voice cancel, microphone Echo, and Surround, with easy control. With A/D and D/A converters integrated, this LSI can handle input and output of analog audio signals in addition to digital audio signals.

There are some features of YSS216Bas follows: (1)built-in 3-channel 15-bit floating A/D converters and 1-channel D/A converter handle audio signals from L, R and microphone channels; (2)digital signals can be input directly, and it is possible to output digital signals to oversampling filter or DACs; (3)de-emphasis processing for digital audio input signals; (4)mixing, fade-in and fade-out processing for digital/analog signals; (5)voice cancel processing for attenuating center-positioned voice; (6)key control processing up to a maximum ±3 whole tone by a quarter tone; (7)microphone echo processing up to a maximum 200ms; (8)surround signal processing with 4 preset patterns; (9)5 V single power supply, Si-gate CMOS process; (10)64-pin plastic QFP.

The following is about the absolute maximum ratings of YSS216B: (1)power supply voltage, VDD: -0.3 to 7.0 V; (2)input voltage, VIN; -0.3 to VDD+0.3 V; (3)operating temperature, Top: 0 to 70; (4)storage temperature, Tstg: -50 to 125.