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ZL50075 Datasheet(PDF) 2 Page - Zarlink Semiconductor Inc

Part No. ZL50075
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
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Maker  ZARLINK [Zarlink Semiconductor Inc]
Homepage  http://www.zarlink.com
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ZL50075 Datasheet(HTML) 2 Page - Zarlink Semiconductor Inc

 
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ZL50075
Data Sheet
2
Zarlink Semiconductor Inc.
Applications
• Large Switching Platforms
• Central Office Switches
• Wireless Base Stations
• Multi-service Access Platforms
• Media Gateways
Description
The ZL50075 is a non-blocking Time Division Multiplex (TDM) switch with maximum 32,768 x 32,768 channels. The
device can switch 64 kbps and Nx64 kbps TDM channels from any input stream to any output stream. With a
number of enhanced features, the ZL50075 is designed for high capacity voice and data switching applications.
The ZL50075 has 64 input and 64 output data streams which can operate at 8.192 Mbps, 16.384 Mbps,
32.768 Mbps or 65.536 Mbps. The large number of inputs and outputs maintains full 32 K x 32 K channel switching
capacity at bit rates of 65 Mbps and 32 Mbps. Up to 32 input and output data streams may operate at 65 Mbps. Up
to 64 input and output data streams may operate at 32 Mbps, 16 Mbps or 8 Mbps. The data rate can be
independently set in groups of 2 input or output streams. In this way it is possible to provide rate conversion from
input data channel to output data channel.
The ZL50075 uses a master clock (CKi0) and frame pulse (FPi0) to define the TDM data stream frame boundary
and timing. A high speed system clock is derived internally from CKi0 and FPi0. The input and output data streams
can independently reference their timings to the input clock or to the internal system clock.
The ZL50075 has a variety of user configurable options designed to provide flexibility when data streams are
connected to multiple TDM components or circuits. These include:
• Variable input bit delay and output advancement, to accommodate delays and frame offsets of streams
connected through different data paths
• Two timing outputs, CKo1 - 0 and FPo1 - 0, which can be configured independently to provide a variety of
clock and frame pulse options
• Support of both ST-BUS and GCI-Bus formats
The ZL50075 also has a number of value added features for voice and data applications:
• Per-channel variable delay mode for low latency applications and constant delay mode for frame integrity
applications
• Per-channel A-Law/
µ-Law Conversions for both voice and data
• 64 separate Pseudo-random Bit Sequence (PRBS) test circuits; one per stream. This provides an integrated Bit
Error Rate (BER) test capability to facilitate data path integrity checking
The ZL50075 has two major modes of operation: Connection Mode (normal) and Message Mode. In Connection
Mode, data bytes received at the TDM inputs are switched to timeslots in the output data streams, with mapping
controlled by the Connection Memories. Using Zarlink's Message Mode capability, microprocessor data can be
broadcast to the output data streams on a per-channel basis. This feature is useful for transferring control and
status information to external circuits or other TDM devices.
A non-multiplexed microprocessor port provides access to the internal Data Memory, Connection Memory and
Control Registers used to program ZL50075 options. The port is configurable to interface with either 16 bit Motorola
or Intel-type microprocessors.
The mandatory requirements of IEEE 1149.1 standard are supported via the dedicated Test Access Port.


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