MT90221 Zarlink Semiconductor, MT90221 Datasheet - Page 2

• Manufacturer Part Number: MT90221
• Description: Quad Inverse Multiplexing For Atm (IMA) Device With Flexible Ima And Uni Mode
• Manufacturer: Zarlink Semiconductor

Features
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Figure 1 - MT90221 Block Diagram with Built-in IMA functions for 4 IMA Groups over up to 4 links
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 (CTC)
and Independent Transmit Clock (ITC) clocking
modes
Supports T1 ISDN lines
Provides UTOPIA Level 2 MPHY Interface
(MT90221 device slaved to ATM device)
Complies with ITU G.804 recommendations for
performing cell mapping into T1 and E1
transmission systems
Provides ATM framing using cell delineation
according to the ITU I.432 cell delineation
process
Level 2
Utopia
BUS
I/F CTRL
Utopia
Utopia FiFo
Processor I/F
RX External Static RAM
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4 x TC Circuit
4 x CD Circuit
Transmission
Convergence
Delineator
Processors
4 Internal
Cell
IMA
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DS5065
Provides Header Error Control (HEC)
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
MQFP-208 pin
JTAG Test support
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MT90221AL
Quad IMA/UNI PHY Device
P/S
P/S
Ordering Information
-40 C to +85 C
ISSUE 4
208 Pin MQFP
4 Serial PCM Ports
Framers
Framers
Framers
MT90221
T1/E1
T1/E1
T1/E1
December 1999
2.048 or
1.544 Mb/s
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