參數(shù)資料
型號(hào)： XRT95L34IV
廠商： Exar Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁(yè)數(shù)： 1/8頁(yè)
文件大?。?/td> 123K
代理商： XRT95L34IV
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
á
PRELIMINARY
XRT95L51
OC-48 ATM UNI/POS/MAPPER IC
JULY 2000
REV. P1.0.1
GENERAL DESCRIPTION
The XRT95L51 is an ATM/PPP physical layer proces-
sor with integrated SONET OC-48/STM-16 framing
controller. ATM direct mapping and cell delineation
are supported, as are PPP mapping and frame pro-
cessing. The XRT95L51 contains an integral SONET
framer which provides framing and error accumula-
tion in accordance with ANSI/ITU-T specifications.
The configuration of this device is done through inter-
nal registers accessible via 8-bit parallel, memory
mapped, microprocessor interface.
The XRT95L51 provides full section, line and path
overhead processing and supports scrambling/de-
scrambling, alarm signal insertion/detection and bit
interleaved parity processing.
The SONET/SDH transmit and receive blocks are
used to transmit/receive an OC-48c/STM-16c signal
or compose and decompose four OC-12/12c sig-
nals.The blocks operate at a peak internal clock
speed of 77 MHz and support 32-bit internal data
paths. The transmit and receive blocks are compliant
with both SONET and SDH standards.
APPLICATIONS
Digital Cross Connect Systems
ATM Switches
Routers
SONET/SDH Add Drop Multiplexers
Multiplexers
FEATURES
Single chip for ATM UNI and Packet over SONET.
Generates and terminates SONET section, line and
path layers.
Provides SONET frame scrambling and descram-
bling.
Provides 32-bit data UTOPIA level II and III multi-
PHY interface and POS-PHY interface.
8-bit microprocessor interface
Includes ATM cell or PPP packet mapping
Single +3.3V power supply with +5V input tolerance
-40°C to +85°C Operating Temperature Range
Available in a 388 pin PBGA package
F
IGURE
1. B
LOCK
D
IAGRAM
OF
THE
95L51 OC-48 ATM UNI/POS/M
APPER
IC
L
Parallel to Serial
Tx XCVR I/F
Serial to Parallel
Rx XCVR I/F
&
Byte Align
Tx OC-12
Mapper X4
Rx OC-12
MapperX4
Overhead
Extraction Block
Tx ATM Cell
Processor
Tx POS Cell
Processor
Rx POS Cell
Processor
Rx ATM Cell
Processor
POH Extract & Interpret
Tx Cell
Buffer
Tx Control
Rx Control
Rx Cell
Buffer
U
JTAG Test Port
5
5
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#.20
7[/'$7$>
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Tx Framer
SOH Processor
POH Processor
Scrambler
Rx Framer
SOH Processor
POH Processor
Descrambler
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48=3
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32
32
Microprocessor Interface
S
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Overhead
Insertion Block
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POH Generation
& Insertion
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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