IDT72801(2001) View Datasheet(PDF) - Integrated Device Technology
Part Name
Description
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IDT72801 Datasheet PDF : 16 Pages
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DEPTH EXPANSION — IDT72801/72811/72821/72831/72841/72851
can be adapted to applications that require greater than 256/512/1,024/
2,048/4,096/8,192 words. The existence of double enable pins on the read
and write ports allow depth expansion. The Write Enable 2/Load (WENA2,
WENB2) pins are used as a second write enables in a depth expansion
configuration, thus the Programmable flags are set to the default values.
Depth expansion is possible by using one enable input for system control
while the other enable input is controlled by expansion logic to direct the flow
of data. A typical application would have the expansion logic alternate data
access from one device to the next in a sequential manner. These FIFOs
operate in the Depth Expansion configuration when the following conditions
are met:
1. WENA2/LDA and WENB2/LDB pins are held HIGH during Reset so
that these pins operate as second Write Enables.
2. External logic is used to control the flow of data.
Please see the Application Note" DEPTH EXPANSION OF IDT'S SYN-
CHRONOUS FIFOs USING THE RING COUNTER APPROACH" for details
of this configuration.
ORDERING IN.ORMATION
IDT XXXXX
Device Type
X
Power
XX
Speed
XX
Package
X
Process/
Temperature
Range
BLANK
I(1)
Commercial (0 C to +70 C)
Industrial (-40 C to +85 C)
PF
Thin Quad Flatpack (TQFP, PN64-1)
TF
Slim Thin Quad Flatpack(STQFP, PP64-1)
10
Commercial Only
Clock Cycle Time
15
Commercial and Industrial (tCLK), Speed in
25
Commercial and Industrial Nanoseconds
L
72801
72811
72821
72831
72841
72851
Low Power
256 x 9 Dual SyncFIFO
512 x 9 Dual SyncFIFO
1,024 x 9 Dual SyncFIFO
2,048 x 9 Dual SyncFIFO
4,096 x 9 Dual SyncFIFO
8,192 x 9 Dual SyncFIFO
NOTES:
1. Industrial temperature range product for 15ns and 25ns speed grade are available as a standard device.
3034 drw 19
DATASHEET DOCUMENT HISTORY
04/24/2001
pgs. 4, 5 and 16
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
for TECH SUPPORT:
(408) 330-1753
e-mail: FIFOhelp@idt.com
PF Pkg: www.idt.com/docs/PSC4036.pdf
TF Pkg: www.idt.com/docs/PSC4046.pdf
The SyncFIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
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