YSS235

YSS235(PTC2) is an audio signal processing LSI for the kay control function of one channel.There are some features as follows.First,it can control the amount of the key shift by 100 cent.The second is the key control of -1800 cent to +1200 cent.Besides, when the key is shifted, human language can be got clearly.Furthermore, 14-bit floating A/D and D/A converters are built in to cope with analog signal.The fifth one is that sampling frequency of the internal signal processing is 16 kHz.The sixth one is that sampling frequency of A/D and D/A converter is 32 kHz.The seventh one is that RAM for the key control processing is built-in.The eighth one is three selective modes for specifing the amount of the key shift including analog voltage mode, switch pulse mode and microprocessor pulse mode.The last one is 5 V single power supply and Si-gate CMOS process.

What comes next is about the absolute maximum ratings of YSS235.The VDD (power supply voltage) is from -0.5 V to +0.7 V.The VIN (input voltage) is from -0.5 V to VDD+0.5 V.The IO (output current) is from -20 to 20 mA.The Top (operating temperature) is from 0 to 70.The Tstg (storage temperature) is from -50 to +125.Then is about the recommended operating conditions.The minimum VDD (power supply voltage) is 4.5 V,the typical is 5.0 V and the maximum is 5.5 V.The minimum Top (operating temperature) is 0, the typical is 25 and the maximum is 70.

The following is about the DC characteristics of YSS235.The typical IDD (power dissipation) is 9 mA at VDD=5.0 V.The minimum VIH (input high voltage) is 0.7VDD V.The maximum VIL (input low voltage) is 0.3VDD V.The minimum VOH (output high voltage) is VDD-0.4 V V at IOH=-0.4 mA.The maximum VOL (output low voltage) is 0.4 V at IOL=1.6 mA.The maximum ILI (input leakage current) is 10A.The maximum CIN (input capacitance) is 8 pF and the maximum COUT (output capacitance) is 10 pF.