MT90871 Zarlink Semiconductor, MT90871 Datasheet - Page 9

• Manufacturer Part Number: MT90871
• Description: Flexible 8K Digital Switch (F8KDX)
• Manufacturer: Zarlink Semiconductor

Data Sheet
1.1.2
Because the input and output drivers are synchronous, the user can combine input backplane streams and input
local streams or output backplane streams and output local streams to increase the total number of input and output
streams of the switch in a unidirectional configuration.
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1.1.3
The F8KDX can be configured as a blocking switch if it is an application requirement. For example, it can be
configured as a 6K by 2K blocking switch.
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2.0
2.1
The device supports five switching configurations. (1) Backplane-to-Local, (2) Local-to-Backplane, (3) Backplane-
to-Backplane, (4) Local-to-Local, and (5) Uni-directional switch. The following sections describe the switching paths
in detail. Configurations (1) - (4) enable a non-blocking switch with a maximum capacity of 4,096 input channels
and 4,096 output channels at Backplane and Local stream data-rates of 16.384Mb/s. The switch paths of
Configurations (1) to (4) may be operated simultaneously. Configuration (5) provides a uni-directional switch with
a maximum capacity of 8,192 x 8,192 channels at 16.384Mb/s data rate.
2.1.1
The device can provide data switching between the Backplane input ports and the Local output ports. The
Local Connection Memory determines the switching configurations.
2.1.2
The device can provide data switching between the Local input ports and the Backplane output ports. The
Backplane Connection Memory determines the switching configurations.
2.1.3
The device can provide data switching between the Backplane input and output ports. The Backplane
Connection Memory determines the switching configurations.
8,192-channel x 8,192-channel non-blocking switching from input to output streams
6,144-channel x 2,048-channel blocking switching from ’backplane’ to ’local’ streams
2,048-channel x 6,144-channel blocking switching from ’local’ to ’backplane’ streams
6,144-channel x 6,144-channel non-blocking switching from ’backplane’ input to ’backplane’ output
streams
2,048-channel x 2,048-channel non-blocking switching from ’local’ input to ’local’ output streams
Total 24 input streams and
24 output streams.
Unidirectional Configuration
Blocking Configuration
Functional Description
Switching Configuration
Backplane-to-Local path
Local-to-Backplane path
Backplane-to-Backplane path
BSTo0-15
BSTi0-15
LSTo0-7
LSTi0-7
Figure 5 - 6K by 2K Blocking Configuration
6K x 6K
Zarlink Semiconductor Inc.
2K by 6K
MT90871
6K by 2K
2K by 2K
Total 8 input streams and
LSTo8-15
LSTi8-15
8 output streams.
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