Product category:
Communications ICs (Wired)
News Release from: Zarlink Semiconductor | Subject: MT90503
Edited by the Electronicstalk Editorial
Team on 27 July 2001
First AAL1 device to perform on-chip ATM
switching
Zarlink Semiconductor claims the MT90503 is the industry's highest density AAL1 segmentation and reassembly (SAR) chip for TDM to ATM conversion.
Zarlink Semiconductor claims the MT90503 is the industry's highest density AAL1 segmentation and reassembly (SAR) chip for TDM to ATM conversion The new chip processes up to 2048 virtual channels (VCs) - more than any device available - and performs on-chip ATM switching, another industry first
This article was originally published on Electronicstalk on 7 Feb 2001 at 8.00am (UK)
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Operators of asynchronous transfer mode (ATM) networks are facing greater volumes of converging voice, data and video traffic, transmitted at higher speeds.
Zarlink's MT90503 chip provides equipment designers with the industry's highest bandwidth solution for ATM edge switches, multiservice switching platforms, access equipment, and gateways.
The MT90503 receives constant bitrate (CBR) traffic from a time division multiplex (TDM) stream, and converts it to 53byte cells for transmission over ATM networks.
The device processes a maximum of 2048 bidirectional VCs.
When supporting circuit emulation services (CES) or DS1/E1 N x 64kbit/s service with channel associated signaling (CAS), the chip supports 1024 VCs.
Zarlink's newest SAR device offers improved flexibility and ease-of-use.
On its ATM interface, the MT90503 transfers data to ATM networks at up to 622Mbit/s, and includes three UTOPIA ports, the most in the industry.
With its on-chip, or integrated ATM switching capability, costs are lowered since designers can interconnect multiple SAR and physical (PHYs) devices without the need for external hardware.
The chip's TDM interface provides OC-3 bandwidth, with 32 TDM serial input streams running at 2, 4, or 8Mbit/s, and supports open telecomms standard buses such as H.100, H.110 and MVIP.
The MT90503 also supports trunking, which is the ability to map any TDM voice/data channel to any ATM cell in a virtual channel.
In addition, the device exceeds the ATM Forum specification, AF-VTOA-0089, for N x 64Kbit/s service, offering 2048 channel capacity per VC.
The MT90503 is the third in Zarlink's growing family of SAR devices.
It builds on the MT90500, a 1024 channel AAL1 chip, and complements the MT90502, a 1023 channel ATM Adaptation Layer 2 (AAL2) device.
The MT90503 is now shipping in volume and priced at US $250 in 1K quantities.
The device is packaged in a 503-pin PBGA measuring 40 x 40 mm.
A complete evaluation kit with circuit board, documentation, and API software is available for US $6000.
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