TS5071

The TS5071 series are thesecondgenerationcombined PCM CODEC and Filter devices optimized for digital switching applicationson subscriber and trunk line cards.

Using advanced switched capacitortechniquesthe TS5070 and TS5071 combine transmit bandpass and receive lowpass channel filters with a companding
PCM encoder and decoder. The devices are A-law and m-law selectable and employ a conventional serial PCM interface capable of being clockedup to 4.096MHz.A number of programmable functionsmay be controlled via a serial control port.

Channel gains of the TS5071 are programmable over a 25.4 dB range in each direction, and a programmable filter is included to enable Hybrid Balancing to be adjusted
to suit a wide range of loop impedanceconditions. Both transformer and active SLIC interface circuits with real or complex termination impedances can
be balanced by this filter, with cancellation in excessof 30 dB beingreadily achievablewhenmeasured  acrossthe passbandagainst standardtest termination
networks.

To enableCOMBOIIG to interface to the SLICcontrol leads, a number of programmable latches are included ; each may be configured as either an input
or an output. The TS5070 provides 6 latches and the TS5071 5 latches.