mt89l86apr1 Zarlink Semiconductor, mt89l86apr1 Datasheet - Page 22

• Manufacturer Part Number: mt89l86apr1
• Description: 512 X 256 Channels 3.3 V Multiple Rate Digital Switch Mrdx With Constant Delay Mode
• Manufacturer: Zarlink Semiconductor

Applications
Switch Matrix Architectures
The MT89L86 is an ideal device for designs of medium size switch matrix. For applications where voice and
grouped data channels are transported within the same frame, the voice samples have to be time interchanged with
a minimum delay while maintaining the integrity of grouped data. To guarantee the integrity of grouped data during
switching and to provide a minimum delay for voice connections, the MT89L86 provides the per-channel selection
between variable and constant throughput delay. This can be selected by the V/C bit of the Connection Memory
High locations.
Different configurations at different data rates can be built to accommodate Non-Blocking matrices of up to 512
channels while maintaining the per channel selection of the device's throughput delay. Some examples of such
Non-Blocking configurations are given in Figures 9 to 11.
For applications where voice and data samples are encoded into individual 64 kb/s time-slots on an 8kHz frame
basis, the switch matrix can operate with time interchange procedures where only variable throughput delay is
guaranteed. For such applications, the MT89L86 allows cost effective implementations of Non-Blocking matrices
ranging up to 1024 channels. Figures 12 and 13 show the block diagram of implementations with Non-Blocking
capacities of 512 and 1024-channel, respectively.
x=Don’t care
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Figure 10 - 256-Channel Switch with Rate Conversion between 2.048 and 4.096 Mb/s
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Figure 9 - 512-Channel Switch with Serial Streams at 2.048 Mb/s
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MT89L86
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Data Sheet
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