am79c203 ETC-unknow, am79c203 Datasheet
am79c203
Manufacturer Part Number
am79c203
Description
Advanced Subscriber Line Interface Circuit Aslic Device
Manufacturer
ETC-unknow
Datasheet
1.AM79C203.pdf
(48 pages)
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Am79213/Am79C203/031
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
Standard microprocessor interface
Industry standard PCM interface with full-time
slot assignment
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 Non-
ringing 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
Linear data available on PCM ports for custom
compression and expansion
Compatible with inexpensive protection
networks. Accommodates 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 kHz and 16 kHz metering generation
with on and off meter pulse shaping
Supports loop-start and ground-start signaling
0°C to +70°C commercial operation guaranteed
by production testing
–40°C to +85°C temperature range operation
available
Publication# 080160
Issue Date: April 2000
Rev: D Amendment: /0
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