Zarlink (Zarlink Semiconductor ) : MT90520

8-Port Primary Rate Circuit Emulation AAL1 SAR

The MT90520 8-Port Primary Rate Circuit Emulation AAL1 SAR allows primary rate TDM circuits to be carried over ATM networks using Circuit Emulation Services. Up to 256 bi-directional ATM VC connections can be simultaneously processed by the MT90520 CES AAL1 SAR device.

Features

• AAL1 Segmentation and Reassembly device compliant with Circuit Emulation Services (CES) standard (af-vtoa-0078.000)
• Supports both Unstructured and Structured Circuit Emulation of 8 independent DS1/E1/STBUS interfaces
• Supports AAL1 trunking, with up to 128 TDM channels per VC (af-vtoa-0089.001)
• Supports CAS transmission and reception in all structured modes of operation
• Supports simultaneous processing of up to 256 bidirectional Virtual Circuits
• Supports mixed DS1/E1 operation
• Supports mixed Unstructured and Structured CES operation
• Fully flexible DS0 assignment
• Complete clock recovery solution provided onchip: Synchronous, Adaptive, or Synchronous Residual Time Stamp (SRTS) via 8 independent PLLs
• Dual-mode (ATM-end or PHY-end) UTOPIA port operates in Level 1 or Level 2 mode for connection to external PHY or ATM devices with UTOPIA clock rate up to 52 MHz

Typical Applications

• B-ISDN (Broadband ISDN) systems requiring flexible N x 64kbps transport
• Systems requiring af-vtoa-0078.000 (ATM Forum CES v2.0) ?DS1 or E1 Nx64 Basic Service?, ?DS1 or E1 Nx64 Service with CAS?, or ?DS1 or E1 Unstructured Service? - flexible CES allows one-board solution to support multiple CES modes
• Systems requiring af-vtoa-0089.001 (ATM Forum - ATM Trunking Using AAL1 for Narrowband Services) - transport of up to 128 channels per VC
• DSLAM
• IAD
• Voice gateway
• NGDLC
• ATM Public Network access for PBX or CO

Technology:	CMOS
Package:	PBGA 456 Pin

http://assets.zarlink.com/products/datasheets/zarlink_MT90520_SEP_02.pdf