Product category:
Communications ICs (Wired)
News Release from: IDT | Subject: 82P2828, 82P2821 and 82P2816
Edited by the Electronicstalk Editorial
Team on 05 July 2005
Line interfaces optimise tributary
aggregation
Integrated Device Technology has developed a new family of high-density line interface units for the T1/E1/J1 market.
Integrated Device Technology has developed a new family of high-density line interface units (LIUs) for the T1/E1/J1 market The family, which includes 28- (82P2828), 21- (82P2821) and 16-channel (82P2816) options in ultrasmall packages, provides an optimised set of solutions for tributary aggregation in applications such as multiservice provisioning platforms (MSPP), optical multiplexers, edge routers and wireless transport systems
This article was originally published on Electronicstalk on 12 Apr 2001 at 8.00am (UK)
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The new devices offer nearly four times the density of other LIU solutions on a single chip, saving at least 20% in board space.
The high-density LIU family also offers very flexible line and system interface configuration options to address a wide range of applications.
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An industry standard system interface ensures support for both commercial and custom framing and mapping circuits with standard TDM interfaces.
Each channel of the high-density LIU can be selected to operate independently in T1, J1 or E1 (75/120?) mode.
Fully integrated and software programmable internal impedance circuits enable designers to save external components and address multiple markets with a single bill of materials.
The new IDT devices also offer various line termination configuration options, including the industry's first true single-ended termination for E1 applications on the primary and secondary side of the transformer.
Up to 63 valuable backplane traces can be saved when routing lines from the I/O panel to the LIU.
IDT has also pioneered an innovative transformer-less operation and single-ended termination mode for differential T1/J1 and E1 lines to provide additional space and cost savings in intra-building applications.
The new LIU devices deliver an optimised architecture to support 1+1 and 1:1 hitless protection switching without external relays, thereby enabling redundancy in high-availability systems.
Other features include the provision of two output clocks derived from any of the recovered line clocks.
An integrated clock synthesiser is available as an option to scale these clocks to a wide range of frequencies from 8kHz to 32.768MHz.
A cascading feature is also provided to select a single reference clock from multiple devices without the need for any external logic.
The IDT high-density LIU devices ensure standards compliance by meeting or exceeding popular networking specifications by ANSI, ITU, ETSI and AT and T.
Dedicated monitor channels that meet the ITU G.772 requirements for in-service monitoring are available on every device option (ie 28(+1), 21(+1), 16(+1) channel).
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