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TP3076N-G
Combo II Programmable PCM CODEC/Filter for ISDN and Digital Phone Applications
TP3076
COMBO® II Programmable PCM CODEC/Filter for ISDN
and Digital Phone Applications
General DescriptionThe TP3076 isa second-generation combined PCM CODEC
and Filter devices optimizedfor digital switching applications subscriber line and trunk cards and digital phone appli-
cations. Using advanced switched capacitor techniques,
COMBOII combines transmit bandpass and receive low-
pass channel filters witha companding PCM encoder and
decoder. The devices are A-law and µ-law selectable and
employa conventional serial PCM interface capableof being
clockedupto 4.096 MHz.A numberof programmable func-
tions maybe controlledviaa serial control port.
Channel gains are programmable overa 25.4dB rangein
each direction. enable COMBOIIto interfacetothe SLIC control leads,a
numberof programmable latchesare included; each maybe
configuredas eitheran inputoran output. The TP3076
provides4 latches.
Features Complete CODEC and Filter system including: Transmit and receive PCM channel filters µ-lawor A-law companding coder and decoder Receive power amplifier drives 300Ω 4.096 MHz serial PCM data (max) Programmable functions: Transmit gain: 25.4dB range, 0.1dB steps Receive gain: 25.4dB range, 0.1dB steps Time-slot assignment;to64 slots/frame4 interface latchesAor µ-law Analog loopback Digital loopback Direct interfaceto solid-state SLICs Standard serial control interface80 mW operating power (typ) 1.5 mW standby power (typ) Designedfor CCITT and LSSGR specifications TTL and CMOS compatible digital interfaces
Note:See alsoAN-614 COMBOII application guide.
Block DiagramFebruary 2003
TP3076
COMBO
Programmable
PCM
CODEC/Filter
for
ISDN
and
Digital
Phone
Applications
