MT90823AL1 View Datasheet(PDF) - Zarlink Semiconductor Inc
Part Name
Description
MFG CO.
MT90823AL1 Datasheet PDF : 46 Pages
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MT90823
Data Sheet
Applications
Switch Matrix Architectures
The MT90823 is an ideal device for medium to large size switch matrices where voice and grouped data channels
are transported within the same frame. In such applications, the voice samples have to be time interchanged with a
minimum delay while maintaining the integrity of grouped data. To ensure the integrity of grouped data during
switching and to provide a minimum delay for voice connections, the MT90823 provides per-channel selection
between variable and constant throughput delay. This can be selected by the V/C bit of the Connection Memory.
Figure 6 illustrates how four MT90823 devices can be used to form non-blocking switches for up to 4096 channels
with data rate of 8.192 Mb/s.
Serial Input Frame Alignment Evaluation
The MT90823 is capable of performing frame alignment evaluation. The frame pulse under evaluation is connected
to the FE (frame measurement) pin. An external multiplexer is required to select one of the frame pulses related to
the different input streams. Figure 7 - The block diagram at Figure 7 shows a switch matrix that performs frame
alignment evaluation for 16 frame pulses.
16 Streams
IN
16 Streams
MT90823
#1
MT90823
#2
MT90823
#3
MT90823
#4
16 Streams
OUT
16 Streams
Bit Rate
(IN/OUT)
Size of
Switch Matrix
2.048 Mb/s 1,024 - Channel Switch
4.096 Mb/s 2,048 - Channel Switch
8.192 Mb/s 4,096 - Channel Switch
Figure 6 - Switch Matrix with Serial Stream at Various Bit Rates
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Zarlink Semiconductor Inc.
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