XRT73L06 Datasheet, PDF (1/63 Pages) Exar Corporation – SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73L06
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
OCTOBER 2003
GENERAL DESCRIPTION
The XRT73L06 is a six channel fully integrated Line
Interface Unit (LIU) for E3/DS3/STS-1 applications.
The LIU incorporates 6 independent Receivers and
Transmitters in a single 217 Lead BGA package.
Each channel of the XRT73L06 can be independently
configured to operate in E3 (34.368 MHz), DS3
(44.736 MHz) or STS-1 (51.84 MHz). Each
transmitter can be turned off and tri-stated for
redundancy support or for conserving power.
The XRT73L06’s differential receiver provides high
noise interference margin and is able to receive data
over 1000 feet of cable or with up to 12 dB of cable
attenuation.
The XRT73L06 provides a Parallel Microprocessor
Interface for programming and control.
REV. 1.0.2
The XRT73L06 supports analog, remote and digital
loop-backs. The device also has a built-in Pseudo
Random Binary Sequence (PRBS) generator and
detector with the ability to insert and detect single bit
error for diagnostic purposes.
APPLICATIONS
• E3/DS3 Access Equipment
• DSLAMs
• Digital Cross Connect Systems
• CSU/DSU Equipment
• Routers
• Fiber Optic Terminals
FIGURE 1. BLOCK DIAGRAM OF THE XRT 73L06
CS
RD
WR
Addr[7:0]
D[7:0]
PCLK
RDY
INT
Pmode
RESET
RTIP_n
RRing_n
TTIP_n
TRing_n
MTIP_n
MRing_n
DMO_n
ICT
µProcessor Interface
XRT73L06
XRT73L06
Peak Detector
AGC/
Equalizer
Slicer
Local
LoopBack
Clock & Data
Recovery
LOS
Detector
Clock
Synthesizer
MUX
Remote
LoopBack
HDB3/
B3ZS
Decoder
Line
Driver
Device
Monitor
Tx
Pulse
Shaping
Tx
Control
Timing
Control
HDB3/
MUX
B3ZS
Encoder
Channel 0
Channel n...
Channel 5
CLKOUT_n
SFM_en
RLOL_n
E3Clk
DS3Clk
STS-Clk/12M
RxClk_n
RxPOS_n
RxNEG/LCV_n
RLOS_n
TxClk_n
TxPOS_n
TxNEG_n
TxON
PART NUMBER
XRT73L06IB
ORDERING INFORMATION
PACKAGE
217 Lead BGA
OPERATING TEMPERATURE RANGE
-40^°C to +85^°C
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com