IDT72T51246L5BB datasheet(6/62 Pages) IDT

Part #	IDT72T51246L5BB

Description	2.5V MULTI-QUEUE FLOW-CONTROL DEVICES (4 QUEUES) 36 BIT WIDE CONFIGURATION 589,824 bits, 1,179,648 bits and 2,359,296 bits

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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TEMPERATURERANGES

IDT72T51236/72T51246/72T51256 2.5V, MULTI-QUEUE FLOW-CONTROL DEVICES

(4 QUEUES) 36 BIT WIDE CONFIGURATION 589,824, 1,179,648 and 2,359,296 bits

EXPANSION

Expansion of multi-queue devices is also possible, up to 8 devices can be

connectedinaparallelfashionprovidingthepossibilityofbothdepthexpansion

or queue expansion. Depth Expansion means expanding the depths of

individual queues. Queue expansion means increasing the total number of

queues available. Depth expansion is possible by virtue of the fact that more

memory blocks within a multi-queue device can be allocated to increase the

depth of a queue. For example, depth expansion of 8 devices provides the

possibilityof8queuesof64Kx36deep,eachqueuebeingsetupwithinasingle

device utilizing all memory blocks available to produce a single queue. This is

the deepest queue that can setup within a device.

For queue expansion of the 4 queue device, a maximum number of 32 (8

x 4) queues may be setup, each queue being 2K x36 deep, if less queues are

setup, then more memory blocks will be available to increase queue depths if

desired. When connecting multi-queue devices in expansion mode all respec-

tive input pins (data & control) and output pins (data & flags), should be

“connected” together between individual devices.

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