Multimedia ICs KARAOKE echo IC BU9253AS / BU9253FS / BU9255FS The BU9253AS, BU9253FS and BU9255FS are single-chip ICs that contain all the components needed to configure a KARAOKE echo system: an A / D and D / A converter, SRAM, LPF, and mixer for mixing source signals.
With these ICs, an echo function can be configured easily and with minimum external components.
Applications • KARAOKE functions for portable stereo sets, mini component stereo sets, video CDs and DVDs, etc.
Features • 1) Echo mixing ratio is adjustable with a DC voltage.
2) A second order LPF can be configured with the internal amplifier and an attached capacitor and resistor.
3) Delay time of 131ms.
(when fCLK = 357kHz) 4...

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