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XRT86L30IV Datasheet(PDF) 1 Page - Exar Corporation

Part # XRT86L30IV
Description  SINGLE T1/E1/J1 FRAMER/LIU COMBO
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT86L30IV Datasheet(HTML) 1 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
JANUARY 2008
REV. 1.0.1
GENERAL DESCRIPTION
The XRT86L30 is a single channel 1.544 Mbit/s or
2.048 Mbit/s DS1/E1/J1 framer and LIU integrated
solution
featuring
R3
technology
(Relayless,
Reconfigurable,
Redundancy).
The
physical
interface is optimized with internal impedance, and
with the patented pad structure, the XRT86L30
provides protection from power failures and hot
swapping.
The XRT86L30 contains an integrated DS1/E1/J1
framer and LIU which provide DS1/E1/J1 framing and
error accumulation in accordance with ANSI/ITU_T
specifications. The framer has a framing synchronizer
and transmit-receive slip buffers. The slip buffers can
be independently enabled or disabled as required
and can be configured to frame to the common DS1/
E1/J1 signal formats.
The Framer block contains a Transmit and Receive
T1/E1/J1 Framing function. There are 3 Transmit
HDLC controllers which encapsulate contents of the
Transmit HDLC buffers into LAPD Message frames.
There are 3 Receive HDLC controllers which extract
the payload content of Receive LAPD Message
frames from the incoming T1/E1/J1 data stream and
write the contents into the Receive HDLC buffers.
The framer also contains a Transmit and Overhead
Data Input port, which permits Data Link Terminal
Equipment direct access to the outbound T1/E1/J1
frames. Likewise, a Receive Overhead output data
port permits Data Link Terminal Equipment direct
access to the Data Link bits of the inbound T1/E1/J1
frames.
The XRT86L30 fully meets all of the latest T1/E1/J1
specifications:
ANSI T1/E1.107-1988, ANSI T1/
E1.403-1999,
ANSI
T1/E1.231-1993,
ANSI
T1/
E1.408-1990, AT&T TR 62411 (12-90) TR54016, and
ITU G-703, G.704, G706 and G.733, AT&T Pub.
43801, and ETS 300 011, 300 233, JT G.703, JT
G.704, JT G706, I.431. Extensive test and diagnostic
functions
include
Loop-backs,
Boundary
scan,
Pseudo Random bit sequence (PRBS) test pattern
generation, Performance Monitor, Bit Error Rate
(BER) meter, forced error insertion, and LAPD
unchannelized data payload processing according to
ITU-T standard Q.921.
Applications and Features (next page)
FIGURE 1. XRT86L30 1-CHANNEL DS1 (T1/E1/J1) FRAMER/LIU COMBO
Performance
Monitor
PRBS
Generator &
Analyser
HDLC/LAPD
Controllers
LIU &
Loopback
Control
DMA
Interface
Signaling &
Alarms
JTAG
WR
ALE_AS
RD
RDY_DTACK
µP
Select
A[11:0]
D[7:0]
Microprocessor
Interface
4
3
Tx Serial
Clock
Rx Serial
Clock
8kHz sync
OSC
Back Plane
1.544-16.384 Mbit/s
Local PCM
Highway
2-Frame
Slip Buffer
Elastic Store
Tx Serial
Data In
Tx LIU
Interface
2-Frame
Slip Buffer
Elastic Store
Rx LIU
Interface
Rx Framer
Rx Serial
Data Out
RTIP
RRING
TTIP
TRING
External Data
Link Controller
Tx Overhead In
Rx Overhead Out
XRT86L30
Tx Framer
LLB
LB
System (Terminal) Side
Line Side
1:1 Turns Ratio
1:2 Turns Ratio
Memory
Intel/Motorola µP
Configuration, Control &
Status Monitor
RxLOS
TxON
INT


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