IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFOTM 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18" />
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    參數(shù)資料
    

    


    


    
型號(hào)：
IDT72205LB25TF

    

    
廠商：
IDT, Integrated Device Technology Inc

    

    
文件頁(yè)數(shù)：
14/16頁(yè)

    

    
文件大?。?/td>
0K

    

    
描述：
IC FIFO 256X18 SYNC 25NS 64STQFP

    

    
標(biāo)準(zhǔn)包裝：
80

    

    
系列：
7200

    

    
功能：
同步
    		

    

    
存儲(chǔ)容量：
4.6K（256 x 18）
    		

    

    
數(shù)據(jù)速率：
40MHz
    		

    

    
訪問(wèn)時(shí)間：
25ns
    		

    

    
電源電壓：
4.5 V ~ 5.5 V
    		

    

    
工作溫度：
0°C ~ 70°C
    		

    

    
安裝類型：
表面貼裝
    		

    

    
封裝/外殼：
64-LQFP
    		

    

    
供應(yīng)商設(shè)備封裝：
64-TQFP（10x10）
    		

    

    
包裝：
托盤
    		

    

    
其它名稱：
72205LB25TF
    		

    

    

    

	
    
    
    

    
    
	
    7
    IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFOTM
    256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
    COMMERCIALANDINDUSTRIAL
    TEMPERATURERANGES
    MARCH 2013
    When the LD pin is LOW and WEN is HIGH, the WCLK input is disabled;
    thenasignalatthisinputcanneitherincrementthewriteoffsetregisterpointer,
    nor execute a write.
    Thecontentsoftheoffsetregisterscanbereadontheoutputlineswhenthe
    LD pin is set LOW and REN is set LOW; then, data can be read on the LOW-
    to-HIGH transition of the read clock (RCLK). The act of reading the control
    registersemploysadedicatedreadoffsetregisterpointer.(Thereadandwrite
    pointersoperateindependently).
    A read and a write should not be performed simultaneously to the offset
    registers.
    FIRST LOAD (FL)
    FLisgroundedtoindicateoperationintheSingleDeviceorWidthExpansion
    mode.IntheDepthExpansionconfiguration,FLisgroundedtoindicateitisthe
    first device loaded and is set to HIGH for all other devices in the Daisy Chain.
    (SeeOperatingConfigurationsforfurtherdetails.)
    WRITE EXPANSION INPUT (WXI)
    Thisisadualpurposepin. WXIisgroundedtoindicateoperationintheSingle
    Device or Width Expansion mode. WXIisconnectedtoWriteExpansionOut
    (WXO) of the previous device in the Daisy Chain Depth Expansion mode.
    READ EXPANSION INPUT (RXI)
    Thisisadualpurposepin.RXIisgroundedtoindicateoperationintheSingle
    Device or Width Expansion mode. RXI is connected to Read Expansion Out
    (RXO) of the previous device in the Daisy Chain Depth Expansion mode.
    OUTPUTS:
    FULL FLAG(FF)
    When the FIFO is full, FF will go LOW, inhibiting further write operations.
    WhenFFisHIGH,theFIFOisnotfull. Ifnoreadsareperformedafterareset,
    FFwillgoLOWafterDwritestotheFIFO. D=256writesfortheIDT72205LB,
    512fortheIDT72215LB,1,024fortheIDT72225LB,2,048fortheIDT72235LB
    and 4,096 for the IDT72245LB.
    TheFFisupdatedontheLOW-to-HIGHtransitionofthewriteclock(WCLK).
    EMPTY FLAG/ (EF)
    WhentheFIFOisempty,EFwillgoLOW,inhibitingfurtherreadoperations.
    When EF is HIGH, the FIFO is not empty.
    TheEFisupdatedontheLOW-to-HIGHtransitionofthereadclock(RCLK).
    PROGRAMMABLE ALMOST-FULL FLAG (PAF)
    The Programmable Almost-Full Flag (PAF) will go LOW when FIFO
    reachestheAlmost-Fullcondition. IfnoreadsareperformedafterReset(RS),
    thePAFwillgoLOWafter(256-m)writesfortheIDT72205LB,(512-m)writes
    fortheIDT72215LB,(1,024-m)writesfortheIDT72225LB,(2,048–m)writes
    fortheIDT72235LBand(4,096–m)writesfortheIDT72245LB. Theoffset“m”
    isdefinedintheFULLoffsetregister.
    IfthereisnoFulloffsetspecified,the PAFwillbeLOWwhenthedeviceis
    31awayfromcompletelyfullforIDT72205LB,63awayfromcompletelyfullfor
    IDT72215LB, and 127 away from completely full for IDT72225LB/72235LB/
    72245LB.
    ThePAFisassertedLOWontheLOW-to-HIGHtransitionofthewriteclock
    (WCLK).PAFisresettoHIGHontheLOW-to-HIGHtransitionofthereadclock
    (RCLK). Thus PAF is asynchronous.
    PROGRAMMABLEALMOST-EMPTYFLAG(PAE)
    TheProgrammableAlmost-EmptyFlag(PAE)willgoLOWwhentheread
    pointeris"n+1"locationslessthanthewritepointer.Theoffset"n"isdefinedin
    theEMPTYoffsetregister.
    IfthereisnoEmptyoffsetspecified,theProgrammableAlmost-EmptyFlag
    (PAE) will be LOW when the device is 31 away from completely empty for
    IDT72205LB,63awayfromcompletelyemptyforIDT72215LB,and127away
    fromcompletelyemptyforIDT72225LB/72235LB/72245LB.
    ThePAEisassertedLOWontheLOW-to-HIGHtransitionofthereadclock
    (RCLK).PAEisresettoHIGHontheLOW-to-HIGHtransitionofthewriteclock
    (WCLK). Thus PAE is asynchronous.
    WRITE EXPANSION OUT/HALF-FULL FLAG (WXO/HF)
    This is a dual-purpose output. In the Single Device and Width Expansion
    mode, when Write Expansion In (WXI) and Read Expansion In (RXI) are
    grounded,thisoutputactsasanindicationofahalf-fullmemory.
    Number of Words in FIFO
    IDT72205LB
    IDT72215LB
    IDT72225LB
    IDT72235LB
    IDT72245LB
    FF PAF
    HF PAE EF
    00
    0
    H
    L
    1 to n(1)
    HH
    H
    L
    H
    (n + 1) to 128
    (n + 1) to 256
    (n + 1) to 512
    (n + 1) to 1,024
    (n + 1) to 2,048
    H
    129 to (256-(m+1))
    257 to (512-(m+1))
    513 to (1,024-(m+1))
    1,025 to (2,048-(m+1))
    2,049 to (4,096-(m+1))
    HH
    L
    H
    (256-m)(2)to255
    (512-m)(2)to511
    (1,024-m)(2)to1,023
    (2,048-m)(2)to2,047
    (4,096-m)(2)to4,095
    H
    L
    H
    256
    512
    1,024
    2,048
    4,096
    L
    H
    TABLE 1 — STATUS FLAGS
    NOTES:
    1. n = Empty Offset (Default Values : IDT72205LB n=31, IDT72215LB n = 63, IDT72225LB/72235LB/72245LB n = 127)
    2. m = Full Offset (Default Values : IDT72205LB m=31, IDT72215LB m = 63, IDT72225LB/72235LB/72245LB m = 127)
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
IDT72205LB25TF8
功能描述:IC FIFO 256X18 SYNC 25NS 64STQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:80 系列:7200 功能:同步 存儲(chǔ)容量:18.4K（1K x 18） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（10x10） 包裝:托盤 其它名稱:72225LB10TF

    

    
IDT72205LB25TFI
功能描述:IC FIFO 256X18 SYNC 25NS 64STQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:80 系列:7200 功能:同步 存儲(chǔ)容量:18.4K（1K x 18） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（10x10） 包裝:托盤 其它名稱:72225LB10TF

    

    
IDT72205LB25TFI8
功能描述:IC FIFO 256X18 SYNC 25NS 64STQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:80 系列:7200 功能:同步 存儲(chǔ)容量:18.4K（1K x 18） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（10x10） 包裝:托盤 其它名稱:72225LB10TF

    

    
IDT72210L10TP
功能描述:IC FIFO 512X8 SYNC 10NS 28-DIP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:90 系列:7200 功能:同步 存儲(chǔ)容量:288K（16K x 18） 數(shù)據(jù)速率:100MHz 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（14x14） 包裝:托盤 其它名稱:72271LA10PF

    

    
IDT72210L15TP
功能描述:IC FIFO 512X8 SYNC 15NS 28-DIP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:90 系列:7200 功能:同步 存儲(chǔ)容量:288K（16K x 18） 數(shù)據(jù)速率:100MHz 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（14x14） 包裝:托盤 其它名稱:72271LA10PF

    

    
    
    
    
	
    	
    
    
     
     
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