XRT83D10 Datasheet, PDF (1/18 Pages) Exar Corporation – SINGLE CHANNEL DS1/CEPT LINE INTERFACE UNIT

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XRT83D10
JULY 2004
SINGLE CHANNEL DS1/CEPT LINE INTERFACE UNIT
REV. 1.0.3
GENERAL DESCRIPTION
The XRT83D10 is a fully integrated, single channel,
Line Interface Unit (Transceiver) for 75 Ω or 120 Ω E1
(2.048 Mbps) and 100Ω DS1 (1.544 Mbps)
applications. The LIU consists of a receiver with
adaptive data slicer for accurate data and clock
recovery and a transmitter which accepts dual-rail
digital inputs for signal transmission to the line using
a low- impedance differential line driver. The LIU also
includes a crystal-less jitter attenuator for clock and
data smoothing which, depending on system
requirements, can be selected in either the transmit
or receive path.
The XRT83D10 uses the transformer coupling on
both the Receiver and Transmitter sides, and
supports both 120Ω balanced,75Ω unbalanced and
100Ω interfaces.
FEATURES
• Complete E1 (CEPT) and DS1 Line Interface Unit
• Generates transmit output pulses that are compli-
ant with the ITU-T G.703 Pulse Template for
2.048Mbps (E1) rates
• On-Chip Pulse Shaping for both 75 Ω ,120 Ω and
100 Ω Line Drivers
• Clock Recovery and Selectable Crystal-less Jitter
attenuator
• Compliant with ETS300166 Return Loss
• Compliant with the ITU-T G.823 Jitter Tolerance
Requirements
• Remote, Local and Digital Loop backs
• Declares and Clears LOS per ITU-T G.775
• -40°C to 85°C Temperature Range
• Low Power Dissipation
• +5V or +3.3V Supply Operation
• Pin Compatible with AGERE T7290A and T5290A
APPLICATIONS
• PDH Multiplexers
• SDH Multiplexers
• Digital Cross-Connect Systems
• DECT (Digital European Cordless Telephone) Base
Stations
• CSU/DSU Equipment
FIGURE 1. BLOCK DIAGRAM OF THE XRT83D10
RTIP
R e ceiv e
D ata
RRING
Peak
D e te cto r
D a ta
Slicer
ALOS
Data &
Tim ing
Recovery
EXCLK
Tim ing
G e n e ra to r
DLOS
DLOS
MODE1
MODE2
2
2
Jitter
Attenuator
2
2
Local
Loopback
LP1
2
D ig ita l
Loopback
LP3
SCLK
TTIP
T ransm it
D a ta
TRING
Tx Line
D riv e r
Transm it
Monitor
TSC
Pulse
2
Equalizer
Loss of
C lo c k
TAOS
ICT CLKLOS JA
C lo c k
2
R e m o te
2
Looback
LP2
TAOS
MODE2
EXCLK
Local
R em ote
D ig ita l
TAOS
EC1
EC2
EC3
MODE1
MODE2
Decode
2
EXCLK
µP
Interface
4
RLOS
RPDATA
RNDATA
RCLK
FOFS
TPDATA
TNDATA
TCLK
EXCLK
TAOS
EC1
EC2
EC3
MODE1
MODE2
LOOPA
LOOPB
CS
V_DDA, GND_A
V_DDD, GND_D
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com