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IDT728985

IDT
Part Number IDT728985
Manufacturer IDT
Description TIME SLOT INTERCHANGE DIGITAL SWITCH
Published Dec 29, 2006
Detailed Description www.DataSheet4U.com TIME SLOT INTERCHANGE DIGITAL SWITCH 256 x 256 .EATURES: • • • • • • • • • • IDT728985 256 x 256 ...
Datasheet PDF File IDT728985 PDF File

IDT728985
IDT728985

Overview
www.
DataSheet4U.
com TIME SLOT INTERCHANGE DIGITAL SWITCH 256 x 256 .
EATURES: • • • • • • • • • • IDT728985 256 x 256 channel non-blocking switch Automatic signal identification (ST-BUS®, GCI) 8 RX inputs — 32 channels at 64 Kbit/s per serial line 8 TX outputs — 32 channels at 64 Kbit/s per serial line Three-state serial outputs Microprocessor Interface (8-bit data bus) Frame Integrity for data applications 5V Power Supply Operating Temperature Range -40°C to +85°C Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 44-pin Plastic Quad Flatpack (PQFP) and 40-pin Plastic Dip (P-DIP) and write access to individual channels.
As an important function of a digital switch is to maintain sequence integrity and minimize throughput delay, the IDT728985 is an ideal solution for most switching needs.
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UNCTIONAL DESCRIPTION Frame sequence, constant throughput delay, and guaranteed minimum delay are high priority requirements in today’s integrated data and multimedia networks.
The IDT728985 provides these functions on a per-channel basis using a standard microprocessor control interface.
Each of the eight serial lines is designed to switch 64 Kbit/s PCM or N x 64 Kbit/s data.
In Processor Mode, the microprocessor can access the input and output time slots to control other devices such as ISDN transceivers and trunk interfaces.
Supporting both GCI and ST-BUS® formats, IDT728985 has incorporated an internal circuit to automatically identify the polarity and format of the frame synchronization.
A functional block diagram of the IDT728985 device is shown on page 1.
The serial streams operate continuously at 2.
048 Mb/s and are arranged in 125µs wide frames each containing 32, 8-bit channels.
Eight input (RX0-7) and DESCRIPTION: The IDT728985 is a ST-BUS®/GCI compatible digital switch controlled by a microprocessor.
The IDT728985 can handle as many as 256, 64 Kbit/s input and output channels.
Those 256 channels are divided into 8 serial inputs and outputs, each of which consi...


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