ZL50075GAC ZARLINK [Zarlink Semiconductor Inc], ZL50075GAC Datasheet - Page 14

• Manufacturer Part Number: ZL50075GAC
• Description: 32 K Channel Digital Switch with High Jitter Tolerance, Rate Conversion per Group of 2 Streams (8, 16, 32 or 64 Mbps), and 64 Inputs and 64 Outputs
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

The maximum channel switching capacity is determined by the number of streams and their rate of operation, as
shown in Table 1.
† The maximum capacity shown is when all streams are at the same rate, and none are operating at 16.384 Mbps or 8.192 Mbps.
‡ Switch capacity is limited to less than 32 K channels, only when streams are provisioned at 16 Mbps or 8 Mbps. The maximum switch capac-
1.3
The ZL50075 is a large switch with a comprehensive list of user configurable, ’per-group’ programmable features.
In order to facilitate ease of use, the ZL50075 offers a simple programming model. Streams are grouped in sets of
two, with each group sharing the same configured characteristics. In this way it is possible to reduce programming
complexity, while still maintaining flexible ’per-stream’ configuration options:
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•
•
•
•
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The streams are grouped, one from the TDM ’A’ streams, combined with the corresponding ’B’ streams. For
example, input stream group #12 is STiA12 and STiB12, and output stream group #4 is SToA4 and SToB4. There
are 32 input and 32 output groups. Depending on the data rate set for the group there will be between 1 and 2
streams activated. If the data rate is set for 65.536 Mbps, the ‘A’ stream will be activated and the ‘B’ stream will not
be activated. If the data rate is set for 32.768 Mbps, 16.384 Mbps or 8.192 Mbps, the ‘A’ and ‘B’ streams will be
activated. The maximum channel capacity of a group is 1024 channels when operating at 65 Mbps or 32 Mbps. The
ity in this case is given by 32,768 - (M x 256) - (N x 384), where M is the number of 16 Mbps input or output streams, and N is the number of
8 Mbps input or output streams.
Input and output rate selection, see Section 1.4
Input stream clock source selection, see Section 2.0
Output stream clock source selection, see Section 2.0
Input stream sampling point selection, see Section 5.1
Output stream fractional bit advance, see Section 5.2
Input and output stream inversion control, see Section 14.4
65.536 Mbps
32.768 Mbps
16.384 Mbps
TDM Group
8.192 Mbps
Stream Provisioning
Data Rate
TDM INPUT
64 Streams
Input Group 0
Input Group 31
Maximum Number
of Input TDM Data
Figure 2 - 32 K x 32 K Channel Basic Switch Configuration
Streams
Table 1 - Data Rate and Maximum Switch Size
32
64
64
64
STiA0
STiB0
STiA31
STiB31
Maximum Number
Zarlink Semiconductor Inc.
of Output TDM
Data Streams
ZL50075
ZL50075
32 K x 32 K
32
64
64
64
14
64 kbps Channels
SToA0
SToB0
SToA31
SToB31
per Stream
Number of
1024
256
128
512
Output Group 0
Output Group 31
TDM OUTPUT
64 Streams
Capacity
x channels = total)
32 x 1024 = 32,768
64 x 256 = 16,384
Maximum Switch
64 x 512 = 32,768
64 x 128 = 8,192
†
Data Sheet
(streams
‡
‡