MT90870AG Zarlink, MT90870AG Datasheet - Page 2

• 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

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Applications
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Device Overview
The MT90870 has two data ports, the Backplane and the Local port. The Backplane port has two modes of
operation, either 32 input and 32 output streams operated at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s,
in any combination, or 16 input and 16 output streams operated at 32.768 Mb/s. The Local port has 16 input and 16
output streams operated at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s, in any combination.
The MT90870 contains two data memory blocks (Backplane and Local) to provide the following switching path
configurations:
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The device contains two connection memory blocks, one for the Backplane output and one for the Local output.
Data to be output on the serial streams may come from either of the data memories (Connection Mode) or directly
from the connection memory contents (Message Mode).
Constant throughput delay for frame integrity
Per-channel high impedance output control for Local and Backplane streams
Per-channel driven-high output control for Local and Backplane streams
High impedance-control outputs for external drivers on Backplane and Local port
Per-channel message mode for Local and Backplane output streams
Connection memory block programming for fast device initialization
Automatic selection between ST-BUS and GCI-BUS operation
Non-multiplexed Motorola microprocessor interface
BER testing for Local and Backplane ports
Conforms to the mandatory requirements of the IEEE-1149.1 (JTAG) standard
Memory Built-In-Self-Test (BIST), controlled via microprocessor registers
1.8 V core supply voltage
3.3 V I/O supply voltage
5 V tolerant inputs, outputs and I/Os
Per streams subrate switching at 4 bit, 2 bit and 1 bit depending on stream data rate
Central Office Switches (Class 5)
Mediation Switches
Class-independent switches
Access Concentrators
Scalable TDM-Based Architectures
Digital Loop Carriers
Backplane-to-Local, supporting 8 K x 4 K data switching,
Local-to-Backplane, supporting 4 K x 8 K data switching,
Backplane-to-Backplane, supporting 8 K x 8 K data switching.
Local-to-Local, supporting 4 K x 4 K data switching.
Zarlink Semiconductor Inc.
MT90870
2
Data Sheet