AM79212 Datasheet | Legerity

Am79212/Am79C202 Advanced Subscriber Line Interface Circuit (ASLIC™) Device Advanced Subscriber Line Audio-Processing Circuit (ASLAC™) Device DISTINCTIVE CHARACTERISTICS Performs all of the functions of a CODEC-Filter Single channel architecture Performs Battery-Feed, Ring-trip, Signaling, Coding, Hybrid, and Test (BORSCHT) functions Single hardware design meets multiple country requirements through software programming GCI Interface - Control and PCM on one bus - Data rate up to 4.096 MHz Monitor of two-wire interface voltage and current for subscriber line diagnostics Low idle power per line On-hook transmission Only Battery and +5 V supplies needed Exceeds LSSGR and CCITT central office requirements Off-hook and ground-key detectors with programmable thresholds Programmable line feed characteristics independent of battery voltage Built-in voice path test modes Analog and digital hybrid balance capability Adaptive hybrid balance capability Linear power feed with power management and thermal shutdown Features Abrupt and smooth polarity reversal Power cross detection in ringing and nonringing states Software programmable - - - - - - - - - DC loop feed characteristics and current limit Loop supervision detection thresholds Off-hook detect debounce interval Two-wire AC impedance Transhybrid balance Transmit and receive gains Equalization Digital I/O pins A-law/µ-law selection patible with inexpensive protection networks. Acmodates low-tolerance fuse resistors while maintaining longitudinal balance to Bellcore specifications. Power/Service Denial state Small physical size Integrated ring-trip function Four relay drivers with built-in energy absorption zener diodes Synchronized ring relay operation: zero volts AC on, zero current off Software-enabled normal or automatic Ring-Trip state On-chip 12/16 k Hz metering generation with onand off-meter pulse shaping Supports loop-start and ground-start...