IDT82V1074

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


Specifications

Ratings	Min.	Max.	Unit
Power supply voltage VDD	-0.5	+5	V
VDD-VBH		75	V
Tip/Ring negative pulse		VBH − 0.7	V
Tip/Ring positive pulse		VDD + 0.7	V
ESD voltage (Human body model)		1	°C

Note: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

Description

The RSLIC-CODEC chipset is comprised of one four-channel programmable PCM CODEC (IDT82V1074) and four single-channel ringing SLICs (IDT82V1671). The chipset of IDT82V1068 provides a total solution for line card designs. In addition to providing a complete software programmable solution for BORSCHT, additional functions of IDT82V1068 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 of IDT82V1068 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 of IDT82V1068 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 IDT82V1068 can be used in digital telecommunication applications such as VoIP, VoATM, PBX, CO and DLC etc.