MT8985AL Zarlink, MT8985AL Datasheet - Page 10

• Manufacturer Part Number: MT8985AL
• Description: Switch Fabric 256 x 256 16.384Mbps 5V 44-Pin MQFP Tray
• Manufacturer: Zarlink

Specifications of MT8985AL

• Package: 44MQFP
• Number Of Ports: 8
• Fabric Size: 256 x 256
• Switching Bandwidth: 16.384 Mbps
• Switch Core: Non-Blocking
• Port Speed: 2.048 Mbps
• Operating Supply Voltage: 5 V

Applications
Typical Exchange, PBX or Multiplexer
Figure 7 shows a typical implementation of line cards being interconnected through a central routing matrix that can
scale up in channel capacity to accommodate different number of ports depending on the application. In a
configuration where the switched services utilize concatenated or grouped time slots to carry voice, data and video
(channels of 128, 256 Kb/s, ISDN H0 and others), the central routing matrix has to guarantee constant throughput
delay to maintain the sequence integrity between input and output channels. Figure 7 shows an example where
the MT8985 device guarantees data integrity when data flows from the T1/E1 to the S/U interface links and vice-
versa. Modern technologies available today such as Frame Relay network using dedicated fractional T1 are one of
the key applications for the MT8985 device.
S/U
Basic Rate Line Card
MT8930/31
MT8910
MT8972
Figure 7 - Typical Exchange, PBX or Multiplexer Configuration
ST-BUS
Zarlink Semiconductor Inc.
To other lines
MT8985
To other lines
10
µC
MT8940/
MT8941
Primary Rate Card
ROUTING
MT8985’s
Layers
Entity
2 & 3
MATRIX
ST-BUS
MT8920
MH89760/
MH89790
ST-BUS
Data Sheet
T1/E1
Link
C
P
U