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- GENERAL DESCRIPTION NJU9702 is a single chip cligital delay LSI designed For Dolby Pro- logic or other types surrouncl processor. It consists of 16k SRAM. input/output filter, A/D D/A converters alid control logic. The A/D and D/A converter is using a ADM (Aclaptive Delta Modulation) methocl. Consequntly, ic is realized low noi.se and low disiortion. The clclay time can select from 64 mode of 0.5ms t0 32.8ms in 0.5m.s step, according to the application. Furthermore, the NJU9702 has a sleep mode, mute function, and power on initialization function wliich perform low current con.sump- tion in the sleep mode, muting on/off' control and power on initializa- tion.