MT90870AG Zarlink, MT90870AG Datasheet - Page 35

• Manufacturer Part Number: MT90870AG
• Description: Switch Fabric 12K x 12K/8K x 4K 1.8V/3.3V 272-Pin BGA Tray
• Manufacturer: Zarlink

Specifications of MT90870AG

• Package: 272BGA
• Number Of Ports: 32
• Fabric Size: 12K x 12K|8K x 4K
• Switch Core: Non-Blocking|Blocking
• Port Speed: 2.048|4.096|8.192|16.384 Mbps
• Operating Supply Voltage: 1.8|3.3 V

Note 1: Clock Period count is referenced to Frame Boundary.
Note 2: The Channel Numbers presented relate to the data-rate selected for a specific stream.
Note 3-1 to 3-4: See Section 4.2.1 for examples of Channel Control Bit for streams of different data-rates.
2043
2044
2045
2046
2047
2048
1
2
3
etc
Period
C16o
1
16
20
24
28
0
4
8
12
16
etc
BCSTo0
Table 3 - BCSTo Allocation of Channel Control Bits to the Output Streams
Allocated Stream No.
17
21
25
29
1
5
9
13
17
etc
BCSTo1
18
22
26
30
2
6
10
14
18
etc
BCSTo2
(Non-32 Mb/s Mode) (continued)
Zarlink Semiconductor Inc.
19
23
27
31
3
7
11
15
19
etc
BCSTo3 16 Mb/s
MT90870
35
Ch 0
Ch 0
Ch 0
Ch 0
Ch 1
Ch 1
Ch 1
Ch 1
Ch 1
etc
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
etc
8 Mb/s
Channel No.
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
etc
4 Mb/s
2
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
etc
2 Mb/s
Frame
Boundary
Data Sheet