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30th October 2000,
Fremont, Ca, USA
EXAR Adds Six New Devices to DS1/E1 Product Family,
Propels Strategy to Offer Most Complete Line of Integrated Broadband
Fully Integrated 4- and 8-Channel LIUs, 4- and 8-Channel Framers, Plus New
Single-Channel E1 LIU, and Seven-Channel E1 AFE; All Minimize Design Costs and
Exar Corporation, a
leading provider of high-performance, mixed-signal silicon solutions for the
worldwide communications infrastructure, today announced six new products to its
DS1/E1 product family. The devices are composed of fully integrated four- and
eight-channel DS1/E1 Line Interface Units (LIUs), four- and eight-channel
framers, plus two new European-focused products, a single-channel E1 LIU, and a
seven-channel E1 Analog Front End (AFE) with clock and data recovery.
(four-channel LIU), XRT82L38 (eight-channel LIU), XRT82D20 (single-channel E1
LIU), and XRT81L27 (seven-channel E1 AFE) are compliant with applicable industry
leading DS1/E1 standards. At the same time, the Company introduced the XRT84L14
(four-channel framer), and XRT84L18 (eight-channel framer) which are
complementary to the LIUs. Applications for the multi-channel devices include
digital cross connects, channel banks, T1/E1 multiplexers, high-speed data
transmission line cards, as well as public switching systems and PBX interfaces.
The single-channel E1 LIU can also be used in DECT (Digital European Cordless
Telephone) base stations.
With the advent of these six new devices, Exar now has the most
expansive T/E carrier product line in the industry, covering both T1/E1 and
T3/E3,'' said Dr. Roubik Gregorian, senior vice president and general manager,
Communications division, and CTO, of Exar Corporation. ``We now provide LIUs,
framers, jitter attenuators, ATM UNIs, and M13 multiplexers for the DS3/E3
market, as well as highly integrated DS1/E1 devices. No other supplier can claim
as broad a product family.''
integration levels offered by these new devices greatly reduce component
requirements for T1/E1 transmission applications,'' said Hugh Wright, director
of marketing for the Communications Division at Exar Corporation. "This
capability offers customers lower design costs, and accelerates
LIU Product Details
The two DS1/E1 LIUs
include clock and data recovery, line drivers and jitter attenuators on a single
chip. Both the four- and eight-channel product meets G.772 monitoring standard
and allows redundancy to be built into the system without additional components.
It also supports 1149.1 compliant JTAG in-circuit test capability, and allows
improved manufacturing yield during system assembly.
Each channel consists
of a receiver with equalizer for reliable clock and data recovery, and a
transmitter, which accepts either single or dual-rail inputs for signal
transmission to the line using a low impedance line driver. Each device also
includes a crystal-less jitter attenuator which, depending on system
requirements, can be selected to receive or transmit through the Host or
Hardware Mode control.
The parts meet or
exceed specifications in ITU G.703, G.775, G.736 and G.823; TR-TSY-000449; ANSI
T1.403 and ETSI 300-166. All parts are low power CMOS devices and require only a
single 3.3 Volt supply. All digital inputs are 5 Volt tolerant.
Both DS1 devices are
fully independent, full duplex framers that support D4, ESF, T1DM and SLC-96
formats. They support input PCM and signaling data from 1.544 to 8.192 MHz, as
well as 4-channel multiplexed 12.352/16.384 Mbit/sec backplane busses that
interface with industry standard busses. In addition, two 512-bit elastic store
frame slip buffers are included for each channel, and shared HDLC controllers
support LAP-D messaging. The XRT84L14 is pin compatible to the already available
XRT84V24 E1 framer. The XRT84L18 supports 1149.1 JTAG.
The XRT82D20 is a
full-featured single-channel E1 LIU. The XRT82D20 has duty cycle correction
circuitry to generate output transmit pulses compliant with ITU-T G.703, and it
also detects and clears LOS (loss of signal) to be fully compliant with ITU-T
G.775. At the same time, the Company introduced its XRT81L27IV seven-channel
analog front end (AFE) with clock and data recovery, which allows customers to
implement physical layer solutions without additional devices. The part is
targeted for the same markets as the LIU products.
The XRT81L27 includes
seven independent E1 (CEPT) analog front ends (receiver/transmitter pairs with
clock recovery) allow the physical layer of a 21 line systems to be implemented
with only three devices. The chip contains duty cycle correction circuitry so
that the AFE can generate output transmit pulses compliant with ITU-T G.703
independent of the duty cycle of the transmit clock. It also detects and clears
LOS per ITU-T G.775.
(four-channel), packaged in a 100-pin TQFP, is $27 in 1K units, and the
XRT82L38IV (eight-channel), packaged in a 144-pin TQFP, is $48.64 in sample
quantities. The XRT82D20IW, packaged in a 28-pin SOIC package is $7.64 in 1K
quantities. The XRT81L27IV is $27.95 in 1K quantities and comes in a 128-pin
TQFP package. Samples for these devices will be available in Q1 CY '01, with
production in Q2 CY '01. The XRT84L14IV (four-channel) in a 208-pin PQFP, is $36
for 1K quantities, and the XRT84L18IV (eight-channel) in a 352-pin BGA, is
$61.20 for 1K units. Sample parts will be available in Q4 with production
volumes in Q1 CY '01. All of these products support the industrial temperature
Exar Corporation designs, develops and markets high-performance,
high-bandwidth analog and mixed-signal silicon solutions for the worldwide
communications infrastructure. Leveraging its industry-proven analog design
expertise, system-level knowledge and standard CMOS process technologies, Exar
provides OEMs innovative ICs addressing wide area network (WAN) transmission
standards such as T/E carrier, ATM and SONET. Additionally, Exar offers ICs for
both the serial communications and the video and imaging markets. The Company is
based in Fremont, CA, had fiscal 2000 revenues of $78.6 million, and employs
approximately 282 people worldwide.
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