Document
1.8V MULTI-QUEUE FLOW-CONTROL DEVICES (128 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648 bits 2,359,296 bits 4,718,592 bits
ADVANCE INFORMATION
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IDT72P51749 IDT72P51759 IDT72P51769
FEATURES
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Choose from among the following memory density options: IDT72P51749 Total Available Memory = 1,179,648 bits IDT72P51759 Total Available Memory = 2,359,296 bits IDT72P51769 Total Available Memory = 4,718,592 bits Configurable from 1 to 128 Queues Default configuration of 128 or 64 symmetrical queues Default multi-queue device configurations – IDT72P51749: 256 x 36 x 128Q – IDT72P51759: 512 x 36 x 128Q – IDT72P51769: 1,024 x 36 x 128Q Default configuration can be augmented via the queue address bus Number of queues and individual queue sizes may be configured at master reset though serial programming 200 MHz High speed operation (5ns cycle time) 3.6ns access time Independent Read and Write access per queue
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User Selectable Bus Matching Options: – x36 in to x36 out – x18 in to x36 out – x9 in to x36 out – x36in to x18out – x18 in to x18 out – x9 in to x18 out – x36in to x9out – x18 in to x9 out – x9 in to x9 out User selectable I/O: 1.5V HSTL, 1.8V eHSTL, or 2.5V LVTTL 100% Bus Utilization, Read and Write on every clock cycle Selectable First Word Fall Through (FWFT) or IDT standard mode of operation Ability to operate on packet or word boundaries Mark and Re-Write operation Mark and Re-Read operation Individual, Active queue flags (OR / EF, IR / FF, PAE, PAF, PR) 8 bit parallel flag status on both read and write ports Direct or polled operation of flag status bus Expansion of up to 256 queues JTAG Functionality (Boundary Scan) Available in a 256-pin PBGA, 1mm pitch, 17mm x 17mm HIGH Performance submicron CMOS technology Industrial temperature range (-40°C to +85°C) is available
FUNCTIONAL BLOCK DIAGRAM
MULTI-QUEUE FLOW-CONTROL DEVICE
WADEN FSTR WRADD WEN WCLK WCS
8
READ CONTROL
Q127
RADEN ESTR RDADD
8
WRITE CONTROL
Q126
REN RCLK RCS OE
Q125 Din Qout
x36, 18 or x9 DATA IN
x36, x18 or x9 DATA OUT
READ FLAGS
EF/OR PR PAE PAEn
8
WRITE FLAGS
FF/IR PAF PAFn
8
Q0
PRn
6714 drw01
IDT and the IDT logo are trademarks of Integrated Device Technology, Inc
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
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2004 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
SEPTEMBER 2004
DSC-6714/-
IDT72P51749/72P51759/72P51769 1.8V, MULTI-QUEUE FLOW-CONTROL DEVICES (128 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648, 2,359,296, and 4,718,592 bits
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
Table of Contents
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Features ........................................................................................................................................................................................................................ 1 Description ................................................................................................................................................................................................................... 5 Pin configuration ......................................................................................................................................................................................................... 7 Detailed description .................................................................................................................................................................................................... 8 Pin descriptions ......................................................................................................................................................................................................... 10 Pin number table ........................................................................................................................................................................................................ 16 Recommended DC operating conditions ................................................................................................................................................................ 17 Absolute maximum ratings ........................................................................................................................................................................................ 17 DC electrical characteristics ..................................................................................................................................................................................... 18 AC electrical characteristics ...................................................................................................................................................................................... 20 Functional description .........................................................................................................