3.3V MULTI-QUEUE FIFO (4 QUEUES)
36 BIT WIDE CONFIGURATION
589,824 bits, 1,179,648 bits and
2,359,296 bits
PRELIMINARY
IDT72V51236
IDT72V51246
IDT72V51256
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4 bit parallel flag status on both read and write ports
FEATURES:
Provides continuous PAE and PAF status of up to 4 Queues
Global Bus Matching - (All Queues have same Input Bus Width
and Output Bus Width)
User Selectable Bus Matching Options:
- x36in to x36out
- x18in to x36out
- x9in to x36out
- x36in to x18out
- x36in to x9out
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Choose from among the following memory density options:
IDT72V51236
IDT72V51246
IDT72V51256
Total Available Memory = 589,824 bits
Total Available Memory = 1,179,648 bits
Total Available Memory = 2,359,296 bits
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Configurable from 1 to 4 Queues
Queues may be configured at master reset from the pool of
Total Available Memory in blocks of 256 x 36
Independent Read and Write access per queue
User programmable via serial port
Default Multi-Queue device configurations
-IDT72V51236: 4,096 x 36 x 4Q
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FWFT mode of operation on read port
Packet Ready mode of operation
Partial Reset, clears data in single Queue
Expansion of up to 8 Multi-Queue devices in parallel is available
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
-IDT72V51246: 8,192 x 36 x 4Q
-IDT72V51256: 16,384 x 36 x 4Q
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100% Bus Utilization, Read and Write on every clock cycle
166 MHz High speed operation (6ns cycle time)
3.7ns access time
Individual, Active queue flags (OV, FF, PAE, PAF, PR)
DATA PATH FLOW DIAGRAM
MULTI-QUEUE FIFO
WADEN
FSTR
RADEN
ESTR
Q
0
RDADD
6
WRADD
5
REN
WEN
RCLK
WCLK
OE
Q
D
in
out
x9, x18, x36
DATA OUT
x9, x18, x36
DATA IN
OV
FF
Q
3
PR
PAF
PAE
PAFn
4
PAEn/PRn
4
5937 drw01
IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc
JANUARY 2002
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
1
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-5937/4