mt89l85apr1 Zarlink Semiconductor, mt89l85apr1 Datasheet - Page 10

• Manufacturer Part Number: mt89l85apr1
• Description: 256 X 256 Channels 8 Tdm Streams At 2.048 Mbps 3.3 V Non-blocking Enhance Digital Switch Edx With Constant Delay Mode
• Manufacturer: Zarlink Semiconductor

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 MT89L85 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 MT89L85 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
MT89L85
To other lines
10
µC
MT8940/
MT8941
Primary Rate Card
MT89L85’s
ROUTING
Layers
Entity
2 & 3
MATRIX
ST-BUS
MT8920
MH89760/
MH89790
ST-BUS
Data Sheet
T1/E1
Link
C
P
U