44pin QFP (14x14x2.7mm) @ Completely integrated quadruple baseband transceiver for 2 wire twisted pair applications @ 2B+1D+1M channels of PCM-BUS framed data, using time compression multiplexing @ Data rate: 160kbps (2B-++-1D++1M) @ Loop Coverage: ikm (AK134)/2km (AK135) @ Pin compatible between AK134 and AK135 Low amplitude pulse-shaped Alternate Mark Inversion (AMI) coding for reduced spectral radiation @ Differential receiver architecture for highly reliable data recovery @ Bit error rate less than 10-7 @ PCM and Microprocessor ports for combined port operation (0 Operates on a single +5V power supply and draws only 360mW active power (typ) @ Package: 44 pin QFP AMI Line kK} Cai Driver _ FOI LOH< * Pulse AMI Input Timing FOO LOL< 4 Shaping Coder Framer and DsTo Control > BiB? H DST1 U R oat D AM! Output | | S ENDST LIL lecovery ecoder tamer EB and M Transceiver 0 Channel Data os Transceiver 1 Multiplexed WR Transceiver 2 [ Microprocessor *{- RD Transceiver 3 [S_] Port } ALE | > AD(3-0) | ISDN NT! Transceiver @ Single Chip ISDN NT1 (2B1Q U+S) transceiver Activation/Deactivation eoc decoder GOO@OSe CRC and febe processing DFE (Decision Feedback Equalizer) to compromise bridged taps, gage changes, etc. Linear and non-linear echo canceller Excellent NEXT margin 8.192MHz oscillator circuit @ 5V single power supply {0 Low power CMOS AK134/135 BLOCK DIAGRAM @ Package: 80 pin QFP (14xK14xK 2.7mm) MODE }- >| Mode Select (Hardware Control or Microprocessor Control) _| | [S[R- 1 ore FOLK op vi a _| RSFP/ECLK | = Sen oraz tte oy H r rdware CS/SLB2- o- | les ARQ P/F) }> IRO/STAT2 yt Status > STATI | & SCLK/SLBI Cotte! | opeset $0/QCH+ 5 | ee SI/SCH + |_ TESTI | co TEST EXPT! J | pay ENT! <J ps2 MFP < cso FXTJ ye NTM RTIP-S Core RTIP-U 3 SANG RRING- 3 gc TTP ad Core . Sie & ING-S~ imi TRING- m [tine Driver Line Driver | L____. interface __-4 Lid U__-_______"y" interface AKS10 BLOCK DIAGRAM