CHIPSET OF RINGING SUBSCRIBER
LINE INTERFACE CIRCUIT (RSLIC) &
QUAD PROGRAMMABLE PCM CODEC
IDT82V1671 (RSLIC)
IDT82V1074 (CODEC)
FEATURES
• Programmable DC feeding characteristics
• Programmable digital filters adapting to different requirements:
−
Impedance matching
−
Transhybrid balance
−
Transmit and receive gain adjustment
−
Frequency response correction
• Off-hook and ground-key detection
• AC/DC ring trip detection
• Programmable internal balanced ringing without external
components
• Supports external ringing
• Selectable MPI and GCI interfaces
• Supports A/µ-law compressed and linear data formats
• Programmable IO pins with relay-driving or analog input
capability
• Line polarity reversal
• Integrated FSK generator for sending Caller ID information
• On-hook transmission
• 2 programmable tone generators per channel
• Integrated Universal Tone Detection (UTD) unit for fax/modem
tone detection
• Integrated Test and Diagnosis Functions (ITDF)
• Three-party conference
• Only battery and 3.3 V power supply needed
• Package available:
IDT82V1671: 28 pin PLCC
IDT82V1074: 100 pin TQFP
DESCRIPTION
The RSLIC-CODEC chipset is comprised of one four-channel
programmable PCM CODEC (IDT82V1074) and four single-channel
ringing SLICs (IDT82V1671). The chipset provides a total solution for
line card designs. In addition to providing a complete software
programmable solution for BORSCHT, additional functions such as FSK
generator, Universal Tone Detection (UTD) unit, tone generators, ringing
generator, Integrated Test and Diagnosis Functions (ITDF), line polarity
reversal and three-party conference are integrated in to the chipset. The
high integration of system functions reduces board space requirements
of the line card and saves cost.
The chipset is fully programmable via a Microprocessor Interface
(MPI) or a General Circuit Interface (GCI). In both MPI and GCI modes,
the chipset supports A/µ-law companding format or linear data format.
Programmable digital filters on the chipset provide the necessary
transmit and receive filtering to realize impedance matching, transhybrid
balance, frequency response correction and transmit/receive gains
adjustment. The full programmability optimizes the performance of line
card products and allows one line card to adapt to different requirements
worldwide.
The powerful Integrated Test and Diagnosis Functions (ITDF)
accomplish necessary tests and measurements without external test
equipment or relays. This brings convenience to system maintenance
and diagnosis.
This chipset can be used in digital telecommunication applications
such as VoIP, VoATM, PBX, CO and DLC etc.
CHIPSET FUNCTIONAL BLOCK DIAGRAM
CODEC
Level
Metering
Off-hook
Detection
DC Feed
Protection
Circuit
Telephone
Protection
Circuit
Telephone
RSLIC
1
#
Protection
Circuit
Telephone
MPI
Interface
Microprocessor
RSLIC
2
#
RSLIC
3
#
DSP
Filtering
PCM/GCI
Interface
PCM/GCI
CID
UTD
Telephone
Protection
Circuit
RSLIC
4
#
Self Test
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
2003
Integrated Device Technology, Inc.
FEBRUARY 16, 2004
DSC-6042/3
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
