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Quad Inverse Multiplexing for ATM (IMA) device with flexible IMA and UNI modeThe MT90221 device is targeted to systems implementing the ATM FORUM UNI specifications for T1/E1 rates or Inverse Multiplexing for ATM (IMA). In the MT90221 architecture, up to 4 physical and independent T1/E1 streams can be terminated through the utilization of off-the-shelf, traditional T1/E1 framers and LIUs. This allows ATM designers to leverage previous T1/E1 design experience, hardware and software implementation, and to select the best T1/E1 framer for the required application.
Features
- Cost effective, single chip, 4-port ATM IMA and UNI processor
- Up to 4 IMA groups over 4 T1/E1 links can be implemented
- Supports MIXED mode; links not assigned to an IMA group can be used in UNI mode
- Versatile PCM Interface to most popular T1 or E1 framers, reducing development time
- Supports Symmetrical and Asymmetrical Operation
- Supports both Common Transmit Clock and Independent Transmit Clock clocking modes
- Supports T1 ISDN lines
- Provides UTOPIA Level 2 MPHY Interface
- Complies with ITU G.804
- Provides ATM framing using cell delineation according to the ITU I.432 cell delineation process
- Provides Header Error Control verification and generation, error detection, Filler cell filtering (IMA mode) and Idle/Unassigned cell filtering (UNI mode)
- Provides statistics to support MIB
- Connects to popular asychronous SRAM
- Provides statistics on the number of HEC errors
- 8 bit Microprocessor Interface, compatible with Intel and Motorola
- 3.3V operation / 5V tolerant inputs
- JTAG Test support
Typical Applications
- Cost effective single chip solution to implement IMA and UNI links over T1 or E1 in all public or private UNI, NNI and B-ICI applications
- ATM Edge switch IMA and UNI Line Card
Design
- Can be used for cost reduction in current applications based on FPGA implementation
Technology: | unknown |
Package: | MQFP 208 Pin |
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http://products.zarlink.com/partfinder/prodprofile.cgi?device=1012
PDF documentation used to be available at: http://assets.zarlink.com/products/datasheets/zarlink_MT90221_DEC_99.pdf
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