IDT82V2082 Datasheet, PDF (1/79 Pages) Integrated Device Technology – DUAL CHANNEL T1/E1/J1 LONG HAUL/ SHORT HAUL LINE INTERFACE UNIT

DUAL CHANNEL T1/E1/J1 LONG HAUL/
SHORT HAUL LINE INTERFACE UNIT
IDT82V2082
FEATURES:
• Dual channel T1/E1/J1 long haul/short haul line interfaces
• Supports HPS (Hitless Protection Switching) for 1+1 protection
without external relays
• Receiver sensitivity exceeds -36 dB@772KHz and -43
dB@1024 KHz
• Programmable T1/E1/J1 switchability allowing one bill of ma-
terial for any line condition
• Single 3.3 V power supply with 5 V tolerance on digital inter-
faces
• Meets or exceeds specifications in
- ANSI T1.102, T1.403 and T1.408
- ITU I.431, G.703, G.736, G.775 and G.823
- ETSI 300-166, 300-233 and TBR12/13
- AT&T Pub 62411
• Software programmable or hardware selectable on:
- Wave-shaping templates for short haul and long haul LBO (Line
Build Out)
- Line terminating impedance (T1:100 Ω, J1:110 Ω, E1:75 Ω/120
Ω)
- Adjustment of arbitrary pulse shape
- JA (Jitter Attenuator) position (receive path or transmit path)
- Single rail/dual rail system interfaces
- B8ZS/HDB3/AMI line encoding/decoding
DESCRIPTION:
The IDT82V2082 can be configured as a dual channel T1, E1 or J1 Line
Interface Unit. In receive path, an Adaptive Equalizer is integrated to
remove the distortion introduced by the cable attenuation. The
IDT82V2082 also performs clock/data recovery, AMI/B8ZS/HDB3 line
decoding and detects and reports the LOS conditions. In transmit path,
there is an AMI/B8ZS/HDB3 encoder, Waveform Shaper and LBOs.
There is one Jitter Attenuator, which can be placed in either the receive
path or the transmit path. The Jitter Attenuator can also be disabled. The
IDT82V2082 supports both Single Rail and Dual Rail system interfaces.
To facilitate the network maintenance, a PRBS/QRSS generation/detec-
- Active edge of transmit clock (TCLK) and receive clock (RCLK)
- Active level of transmit data (TDATA) and receive data (RDATA)
- Receiver or transmitter power down
- High impedance setting for line drivers
- PRBS (Pseudo Random Bit Sequence) generation and detection
with 2¹⁵-1 PRBS polynomials for E1
- QRSS (Quasi Random Sequence Signals) generation and detec-
tion with 2²⁰-1 QRSS polynomials for T1/J1
- 16-bit BPV (Bipolar Pulse Violation) /Excess Zero/PRBS or QRSS
error counter
- Analog loopback, Digital loopback, Remote loopback and Inband
loopback
• Cable attenuation indication
• Adaptive receive sensitivity
• Non-intrusive monitoring per ITU G.772 specification
• Short circuit protection and internal protection diode for line
drivers
• LOS (Loss Of Signal) & AIS (Alarm Indication Signal) detection
• JTAG interface
• Supports serial control interface, Motorola and Intel Non-Mul-
tiplexed interfaces and hardware control mode
• Package:
IDT82V2082: 80-pin TQFP
tion circuit is integrated in the chip, and different types of loopbacks can
be set according to the applications. Four different kinds of line terminating
impedance, 75 Ω, 100 Ω, 110 Ω and 120 Ω are selectable on a per chan-
nel basis. The chip also provides driver short-circuit protection and internal
protection diode and supports JTAG boundary scanning. The chip can be
controlled by either software or hardware.
The IDT82V2082 can be used in LAN, WAN, Routers, Wireless Base
Stations, IADs, IMAs, IMAPs, Gateways, Frame Relay Access Devices,
CSU/DSU equipment, etc.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
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 2003 Integrated Device Technology, Inc. All rights reserved.
July 2004
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