Product category:
Communications ICs (Wired)
News Release from: Zarlink Semiconductor | Subject: MT90222/3/4 IMA chips
Edited by the Electronicstalk Editorial
Team on 11 October 2001
Inverse multiplexing for ATM
Zarlink Semiconductor has expanded its ATM family with three new multirate, inverse multiplexing for ATM (IMA) chips offering 4-, 8- and 16-port densities.
Zarlink Semiconductor has expanded its asynchronous transfer mode (ATM) family with three new multirate, inverse multiplexing for ATM (IMA) chips offering 4-, 8- and 16-port densities The ability to combine, or cascade up to six of Zarlink's MT90222/3/4 IMA chips provides superior flexibility in designing versatile and cost efficient IMA solutions for broadband access equipment
This article was originally published on Electronicstalk on 7 Feb 2001 at 8.00am (UK)
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Designers are demanding highly flexible IMA chips for transmitting growing volumes of ATM traffic over T1/E1 transmission lines and digital subscriber line (DSL) links.
Zarlink's versatile MT90222/3/4 IMA chips support ATM traffic over T1/E1, fractional T1/E1, and DSL transport facilities, with data rates of up to 10Mbit/s.
The devices are interoperable with IMA interfaces in ATM equipment from leading global vendors, and can be used in ATM edge switches, DSL access multiplexers (DSLAMs), wireless base stations and base station controllers, and other access equipment.
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"With Zarlink's MT90222/3/4 series, we're delivering a complete hardware and software solution that enables designers to build a flexible systems architecture", said Horace Lam, product line manager, Zarlink Semiconductor.
"These chips use the same package and pin-out locations, so the same design can be used for 4- to 32-ports on a single IMA line card.
Additionally, an IMA group can be made up of links from as many as six IMA chips on a TDM ring, further increasing design flexibility".
The MT90222/3/4 series offers mixed mode operation by supporting both IMA and transmission convergence (TC) layer applications, as well as symmetrical and asymmetrical transmissions.
The MT90224 is a 16-port, multirate IMA/TC physical (PHY) device that provides flexible bandwidth by transmitting ATM cells over different groupings of up to 16 independent T1/E1 or DSL links.
A serial bus interface supports data rates up to 2.5Mbit/s.
By aggregating ports, data throughput can be increased to 10Mbit/s.
Zarlink's MT90223 is an 8-port IMA/TC PHY that supports data rates of up to 5Mbit/s.
The MT90222 is a four-port IMA/TC PHY supporting data rates up to 10Mbit/s.
The MT90222/3/4 chips are interchangeable and pin compatible, which supports variable capacity IMA designs.
The chips are fully compliant with the ATM Forum's IMA specification v1.1 and are backward compatible with version 1.0.
Operating on less than one watt, these application specific standard parts (ASSPs) offer a versatile TDM interface, allowing designers to use most off-the-shelf framers without glue logic software, thus easing the implementation of ATM systems.
The 16-port multirate MT90224 begins sampling in November 2001, with volume production starting in the second quarter of 2002.
The device is priced at US$199 in quantities of 1000.
The MT90223, priced at US$129 for 1k quantities, and the MT90222, priced at US$85 for 1k quantities, begin sampling in Q1 2002.
All three devices are packaged in 384-ball PBGAs.
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