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IDT72V805 Datasheet(PDF) 1 Page - Integrated Device Technology

Part No. IDT72V805
Description  3.3 VOLT CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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IDT72V805 Datasheet(HTML) 1 Page - Integrated Device Technology

 
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2001 Integrated Device Technology, Inc.
DSC-4295/1
©
APRIL 2001
3.3 VOLT CMOS DUAL SyncFIFO™
DUAL 256 x 18, DUAL 512 x 18,
DUAL 1,024 x 18, DUAL 2,048 x 18
and DUAL 4,096 x 18
IDT72V805
IDT72V815
IDT72V825
IDT72V835
IDT72V845
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
The IDT logo is a registered trademark and the SyncFIFO is a trademark of Integrated Device Technology, Inc.
FUNCTIONAL BLOCK DIAGRAM
INPUT
REGISTER
OUTPUT
REGISTER
OFFSET
REGISTER
FLAG
LOGIC
FFA/IRA
PAFA
EFA/
ORA
PAEA
HFA/(WXOA)
READ
POINTER
READ
CONTROL
LOGIC
WRITE
CONTROL
LOGIC
WRITE
POINTER
EXPANSION
LOGIC
RESET
LOGIC
WENA
DA0-DA17
LDA
RSA
(
HFA)/WXOA
WXIA
RENA
RCLKA
OEA QA0-QA17
RXOA
RXIA
FLA
WCLKA
INPUT
REGISTER
OUTPUT
REGISTER
RAM
ARRAY
256 x 18
512 x 18
1,024 x 18
2,048 x 18
4,096 x 18
OFFSET
REGISTER
FLAG
LOGIC
FFB/IRB
PAFB
EFB/ORB
PAEB
HFB/(WXOB)
READ
POINTER
READ
CONTROL
LOGIC
WRITE
CONTROL
LOGIC
WRITE
POINTER
EXPANSION
LOGIC
RESET
LOGIC
WENB
DB0-DB17
LDB
RSB
(
HFB)/WXOB
WXIB
RENB
RCLKB
OEB
QB0-QB17
RXOB
RXIB
FLB
WCLKB
4295 drw 01
RAM
ARRAY
256 x 18
512 x 18
1,024 x 18
2,048 x 18
4,096 x 18
FEATURES:
••••• The IDT72V805 is equivalent to two IDT72V205 256 x 18 FIFOs
••••• The IDT72V815 is equivalent to two IDT72V215 512 x 18 FIFOs
••••• The IDT72V825 is equivalent to two IDT72V225 1,024 x 18 FIFOs
••••• The IDT72V835 is equivalent to two IDT72V235 2,048 x 18 FIFOs
••••• The IDT72V845 is equivalent to two IDT72V245 4,096 x 18 FIFOs
••••• Offers optimal combination of large capacity (8K), high speed,
design flexibility, and small footprint
••••• Ideal for the following applications:
– Network switching
– Two level prioritization of parallel data
– Bidirectional data transfer
– Bus-matching between 18-bit and 36-bit data paths
– Width expansion to 36-bit per package
– Depth expansion to 8,192 words per package
••••• 10 ns read/write cycle time
••••• 5V input tolerant
••••• IDT Standard or First Word Fall Through timing
••••• Single or double register-buffered Empty and Full Flags
••••• Easily expandable in depth and width
••••• Asynchronous or coincident Read and Write Clocks
••••• Asynchronous or synchronous programmable Almost-Empty
and Almost-Full flags with default settings
••••• Half-Full flag capability
••••• Output enable puts output data bus in high-impedance state
••••• High-performance submicron CMOS technology
••••• Available in a 128-pin thin quad flatpack (TQFP)
••••• Industrial temperature range (–40°C to +85°C) is available
DESCRIPTION:
The IDT72V805/72V815/72V825/72V835/72V845 are dual 18-bit-wide
synchronous (clocked) First-in, First-out (FIFO) memories designed to run
off a 3.3V supply for exceptionally low power consumption. One dual
IDT72V805/72V815/72V825/72V835/72V845 device is functionally equiva-
lent to two IDT72V205/72V215/72V225/72V235/72V245 FIFOs in a single
package with all associated control, data, and flag lines assigned to
independent pins. These devices are very high-speed, low-power First-In,
First-Out (FIFO) memories with clocked read and write controls. These


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