DS2167

www.DataSheet4U.com DS2167/DS2168 DS2167/DS2168 ADPCM Processor FEATURES PIN ASSIGNMENT RST TM0 TM1 A0 A1 A2 A3 A4 A5 SPS MCLK VSS 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VDD YIN CLKY FSY YOUT CS SDI SCLK XOUT FSX CLKX XIN Speech compression chip compatible with standard ADPCM algorithms: – DS2167 supports “new” T1Y1 recommendations (July 1986) and “new” CCITT G.721 recommendations – DS2168 supports “old” CCITT G.721 recommendations Dual independent channel architecture – device may be programmed to perform full duplex, 2-channel expansions, or 2-channel compressions Interconnects directly with µ-law or A-law codec/filter devices 24-Pin DIP (600 MIL) CLKY FSY YOUT CS SDI SCLK XOUT NC TM1 TM0 RST NC VDD YIN NC A0 A1 A2 A3 A4 A5 54 3 2 6 7 8 9 28-Pin PLCC Serial PCM and control port interfaces minimize “glue logic” in multiple channel applications – On-chip channel counters identify input and output timeslots in TDM-based systems – Unique addressing scheme simplifies device control; 3-wire port shared among 64 devices – Bypass and idle features allow dynamic allocation of channel bandwidth, minimize system power requirements 1 28 27 26 25 24 23 22 21 10 20 11 12 13 14 15 16 17 1819 SPS MCLK VSS NC XIN CLKX FSX Hardware mode intended for stand-alone use – No host processor required – Ideal for voice mail applications 28-pin surface-mount package available, designated DS2167Q/DS2168Q DESCRIPTION The DS2167 and DS2168 are dedicated ...