参数资料
型号: IDT72V06L25JI8
厂商: IDT, Integrated Device Technology Inc
文件页数: 11/12页
文件大小: 0K
描述: IC ASYNCH 8192X18 25NS 32PLCC
标准包装: 750
系列: 72V
功能: 异步
存储容量: 144K(16K x 9)
访问时间: 25ns
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-LCC(J 形引线)
供应商设备封装: 32-PLCC(13.97x11.43)
包装: 带卷 (TR)
其它名称: 72V06L25JI8
8
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V01/72V02/72V03/72V04/72V05/72V06 3.3V ASYNCHRONOUS FIFO
512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9 and 16,384 x 9
OPERATING MODES:
Caremustbetakentoassurethattheappropriateflagismonitoredbyeach
system (i.e. FFis monitored on the device where Wis used; EFis monitored
onthedevicewhereRisused).Foradditionalinformation,refertoTechNote
8: Operating FIFOs on Full and Empty Boundary Conditions and Tech Note
6: Designing with FIFOs.
SINGLE DEVICE MODE
A single IDT72V01/72V02/72V03/72V04/72V05/72V06 may be used
when the application requirements are for 512/1,024/2,048/4,096/8,192/
16,384wordsorless.ThesedevicesareinaSingleDeviceConfigurationwhen
the Expansion In ( XI) control input is grounded (see Figure 12).
TheseFIFOscaneasilybeadaptedtoapplicationswhentherequirements
are for greater than 512/1,024/2,048/4,096/8,192/16,384 words. Figure 14
demonstratesDepthExpansionusingthreeIDT72V01/72V02/72V03/72V04/
72V05/72V06s. Any depth can be attained by adding additional IDT72V01/
72V02/72V03/72V04/72V05/72V06s. These devices operate in the Depth
Expansionmodewhenthefollowingconditionsaremet:
1. ThefirstdevicemustbedesignatedbygroundingtheFirstLoad(FL)control
input.
2. All other devices must have FLin the HIGH state.
3. TheExpansionOut(XO)pinofeachdevicemustbetiedtotheExpansion
In ( XI ) pin of the next device. See Figure 14.
4. ExternallogicisneededtogenerateacompositeFullFlag(FF)andEmpty
Flag ( EF). This requires the ORing of all EFs and ORing of all FFs (i.e.
allmustbesettogeneratethecorrectcompositeFForEF). SeeFigure14.
5. The Retransmit ( RT) function and Half-Full Flag ( HF) are not available
in the Depth Expansion Mode.
Foradditionalinformation,refertoTechNote9: CascadingFIFOsorFIFO
Modules.
USAGE MODES:
WIDTH EXPANSION
Wordwidthmaybeincreasedsimplybyconnectingthecorrespondinginput
controlsignalsofmultipledevices. Statusflags(EF,FFandHF)canbedetected
from any one device. Figure 13 demonstrates an 18-bit word width by using
twoIDT72V01/72V02/72V03/72V04/72V05/72V06s. Anywordwidthcanbe
attainedbyaddingadditionalIDT72V01/72V02/72V03/72V04/72V05/72V06s
(Figure 13).
BIDIRECTIONAL OPERATION
Applications which require data buffering between two systems (each
system capable of Read and Write operations) can be achieved by pairing
IDT72V01/72V02/72V03/72V04/72V05/72V06sasshowninFigure16.Both
Depth Expansion and Width Expansion may be used in this mode.
DATAFLOW-THROUGH
Twotypesofflow-throughmodesarepermitted,areadflow-throughand
writeflow-throughmode. Forthereadflow-throughmode(Figure17),theFIFO
permitsareadingofasinglewordafterwritingonewordofdataintoanempty
FIFO. The data is enabled on the bus in (tWEF + tA) ns after the rising edge of
W,calledthefirstwriteedge,anditremainsonthebusuntilthe Rlineisraised
fromLOW-to-HIGH,afterwhichthebuswouldgointoathree-statemodeafter
tRHZ ns. The EFline would have a pulse showing temporary deassertion and
then would be asserted.
Inthewriteflow-throughmode(Figure18),theFIFOpermitsthewritingof
asinglewordofdataimmediatelyafterreadingonewordofdatafromafullFIFO.
The Rline causes the FFto be deasserted but the Wline being LOW causes
it to be asserted again in anticipation of a new data word. On the rising edge
ofW,thenewwordisloadedintheFIFO.TheWlinemustbetoggledwhenFF
isnotassertedtowritenewdataintheFIFOandtoincrementthewritepointer.
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