Zarlink (Zarlink Semiconductor ) : MT90502

Multi-Channel AAL2 SAR

The MT90502 Multi-Channel AAL2 SAR bridges a standard TDM (Time Division Multiplexed) backplane to a standard ATM (Asynchronous Transfer Mode) bus. The device provides the CPS (Common Part Sublayer) and SAR (Segmentation and Reassembly) engines. The MT90502 has the capability of simultaneously processing 1023 bi-directional CIDs (AAL2 Channel Identifiers) and bi-directional VCCs (Virtual Channel Connections). The device can be connected directly to an H.110 compatible bus. The TDM bus consists of 32 bi-directional serial data streams operating at 2.048, 4.096, or 8.192 Mbits/s.

• AAL2 Segmentation Reassembly device capable of simultaneously processing up to 1023 active CIDs (AAL2 Channel Identifier) and 1023 active VCC (Virtual Channel Connections)
• ATM VCCs can support up to 255 CIDs
• Implements AAL2 Common Part Sub-layer functions specified in ITU I.363.2
• CPS packet payload can support up to 64 bytes
• Can support over-subscription of 10:1
• TDM Bus supports Multiple Data Transfer formats
• Support for a DSP array to perform a variety of operations such as compression of voice
• Two UTOPIA ports: Ports A & B are configurable as a single 8-bit UTOPIA Level 2 PHY Port with 5 ADDR lines or dual 8-bit UTOPIA Level 1 configurable as PHY or ATM
• Third UTOPIA port for connection to an external AAL5 SAR processor
• TDM bus provides 32 bidirectional serial TDM streams operating at 2.40, 4.096, and 8.192 Mbits/s
• Performs silence suppression for PCM and ADPCM
• 8-bit or 16-bit microprocessor port, configurable to Motorola or Intel timing

• Gateway
• ATM Edge Switch
• Next Generation Digital Loop Carrier
• Multiservice Switching Platform
• 3rd Generation Mobile System Equipment

Technology:	unknown
Package:	BGA 456 Pin