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IDT72V235L20TF8 PDF预览

IDT72V235L20TF8

更新时间: 2024-02-18 20:20:00
品牌 Logo 应用领域
艾迪悌 - IDT 时钟先进先出芯片内存集成电路
页数 文件大小 规格书
25页 247K
描述
FIFO, 2KX18, 12ns, Synchronous, CMOS, PQFP64, PLASTIC, STQFP-64

IDT72V235L20TF8 技术参数

是否无铅: 含铅是否Rohs认证: 不符合
生命周期:Obsolete零件包装代码:QFP
包装说明:PLASTIC, STQFP-64针数:64
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.32.00.71风险等级:5.62
最长访问时间:12 ns其他特性:EASILY EXPANDABLE IN DEPTH AND WIDTH
最大时钟频率 (fCLK):50 MHz周期时间:20 ns
JESD-30 代码:S-PQFP-G64JESD-609代码:e0
长度:10 mm内存密度:36864 bit
内存集成电路类型:OTHER FIFO内存宽度:18
湿度敏感等级:3功能数量:1
端子数量:64字数:2048 words
字数代码:2000工作模式:SYNCHRONOUS
最高工作温度:70 °C最低工作温度:
组织:2KX18可输出:YES
封装主体材料:PLASTIC/EPOXY封装代码:LFQFP
封装等效代码:QFP64,.47SQ,20封装形状:SQUARE
封装形式:FLATPACK, LOW PROFILE, FINE PITCH并行/串行:PARALLEL
峰值回流温度(摄氏度):240电源:3.3 V
认证状态:Not Qualified座面最大高度:1.6 mm
最大待机电流:0.005 A子类别:FIFOs
最大供电电压 (Vsup):3.6 V最小供电电压 (Vsup):3 V
标称供电电压 (Vsup):3.3 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn85Pb15)端子形式:GULL WING
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:20宽度:10 mm
Base Number Matches:1

IDT72V235L20TF8 数据手册

 浏览型号IDT72V235L20TF8的Datasheet PDF文件第19页浏览型号IDT72V235L20TF8的Datasheet PDF文件第20页浏览型号IDT72V235L20TF8的Datasheet PDF文件第21页浏览型号IDT72V235L20TF8的Datasheet PDF文件第22页浏览型号IDT72V235L20TF8的Datasheet PDF文件第23页浏览型号IDT72V235L20TF8的Datasheet PDF文件第25页 
IDT72V205/72V215/72V225/72V235/72V245 3.3V CMOS SyncFIFOTM  
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18  
COMMERCIALANDINDUSTRIAL  
TEMPERATURERANGES  
specificationisnotmetbetweenWCLKandtransferclock,orRCLKandtransfer  
clock,fortheORflag.  
Therippledown”delayisonlynoticeableforthefirstwordwrittentoanempty  
depthexpansionconfiguration. Therewillbenodelayevidentforsubsequent  
wordswrittentotheconfiguration.  
The first free location created by reading from a full depth expansion  
configurationwillbubbleup”fromthelastFIFOtothepreviousoneuntilitfinally  
movesintothefirstFIFOofthechain. Eachtimeafreelocationiscreatedinone  
FIFOofthechain,thatFIFOsIRlinegoesLOW,enablingtheprecedingFIFO  
towriteawordtofillit.  
Forafullexpansionconfiguration,theamountoftimeittakesforIRofthefirst  
FIFOinthechaintogoLOWafterawordhasbeenreadfromthelastFIFO is  
the sumofthe delays foreachindividualFIFO:  
DEPTH EXPANSION CONFIGURATION (FWFT MODE)  
InFWFTmode,theFIFOscanbeconnectedinseries(thedataoutputsof  
one FIFO connected to the data inputs of the next) with no external logic  
necessary. Theresultingconfigurationprovidesatotaldepthequivalenttothe  
sumofthedepthsassociatedwitheachsingleFIFO. Figure31showsadepth  
expansionusingtwoIDT72V205/72V215/72V225/72V235/72V245devices.  
CareshouldbetakentoselectFWFTmodeduringMasterResetforallFIFOs  
in the depth expansion configuration. The first word written to an empty  
configurationwillpassfromoneFIFOtothenext(rippledown)untilitfinally  
appears at the outputs of the last FIFO in the chain–no read operation is  
necessarybuttheRCLKofeachFIFOmustbefree-running. Eachtimethedata  
word appears at the outputs of one FIFO, that devices OR line goes LOW,  
enabling a write to the next FIFO in line.  
Foranemptyexpansionconfiguration,theamountoftimeittakesforORof  
thelastFIFOinthechaintogoLOW(i.e.validdatatoappearonthelastFIFO’s  
outputs)afterawordhasbeenwrittentothefirstFIFOisthesumofthedelays  
for each individual FIFO:  
(N – 1)*(3*transfer clock) + 2 TWCLK  
where N is the number of FIFOs in the expansion and TWCLK is the WCLK  
period. NotethatextracyclesshouldbeaddedforthepossibilitythatthetSKEW1  
specificationisnotmetbetweenRCLKandtransferclock,orWCLKandtransfer  
clock,fortheIRflag.  
(N – 1)*(4*transfer clock) + 3*TRCLK  
TheTransferClocklineshouldbetiedtoeitherWCLKorRCLK,whichever  
whereNisthenumberofFIFOsintheexpansionandTRCLKistheRCLKperiod. isfaster. Boththeseactionsresultindatamoving,asquicklyaspossible,tothe  
Note that extra cycles should be added for the possibility that the tSKEW1 endofthechainandfreelocations tothebeginningofthechain.  
HF  
HF  
PAF  
PAE  
TRANSFER CLOCK  
WRITE CLOCK  
WRITE ENABLE  
INPUT READY  
READ CLOCK  
READ ENABLE  
OUTPUT READY  
WCLK  
WEN  
IR  
RCLK  
WCLK  
RCLK  
OR  
WEN  
REN  
72V205  
72V215  
72V225  
72V235  
72V245  
72V205  
72V215  
72V225  
72V235  
72V245  
REN  
OE  
OR  
OE  
Qn  
IR  
OUTPUT ENABLE  
GND  
n
DATA OUT  
n
n
DATA IN  
Dn  
Qn  
Dn  
FL  
(0,1)  
RXI  
FL  
(0,1)  
WXI  
RXI  
WXI  
4294 drw 31  
VCC  
VCC  
GND  
GND  
Figure 31. Block Diagram of 512 x 18, 1,024 x 18, 2,048 x 18, 4,096 x 18, 8,192 x 18  
Synchronous FIFO Memory With Programmable Flags used in Depth Expansion Configuration  
FEBRUARY22,2006  
24  

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