YSS243B

The YSS243B (AC3F) is a Dolby AC-3 5.1 channel full decoder LSI which decodes the signals that has been coded as prescribed in IEC958 interface standard and outputs PCM data comforming to the Dolby AC-3 specification.There are some features as follows.First,both AC-3 and PCM data can be accepted for input data format.Output channels can be selected from monaural to various down-mixing or 5.1 channels of PCM data.Secondly,it operates in AC-3 karaoke mode.Besides,it has built-in buffer for input data and has data interface teminals for connection of external SRAM.Furthermore,interface formats for input data and output data can be specified independently.The fifth one is that it has two more mixed signal output channels in addition to 5.1 PCM data output channels.At last,compression of dynamic range for high amplitude signals and low level signals can be made independently by setting the control register.

What comes next is about the absolute maximum ratings of YSS243B.The VDD (power supply voltage) is from -0.5 V to +0.7 V.The VI (input voltage) is from -0.5 V to VDD+0.5 V.The Top (operating temperature) is from -25 to 75.The Tstg (storage temperature) is from -50 to +125.Then is about the recommended operating conditions.The minimum VDD (power supply voltage) is 4.75 V,the typical is 5.00 V and the maximum is 5.25 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 YSS243B (under recommended operating condition).The typical PDD (power consumption) is 500 mW at VDD=5.0 V.The minimum VOH (output high voltage) is VDD-1.0 V at IOH=-80A.The maximum VOL (output low voltage) is 0.4 V at IOL=1.6 mA.The minimum ILI (input leakage current) is -10A and the maximum is 10A.The minimum RP (pull-up resistor) is 50 k and the maximum is 400 k.