IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFOTM 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18" />
參數(shù)資料
型號(hào)： IDT72225LB25TFI
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 1024X18 SYNC 25NS 64TQFP
標(biāo)準(zhǔn)包裝： 80
系列： 7200
功能： 同步
存儲(chǔ)容量： 18.4K（1K x 18）
訪問(wèn)時(shí)間： 25ns
電源電壓： 4.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°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： 72225LB25TFI
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)
相關(guān)PDF資料
PDF描述
AD7875KRZ IC ADC 12BIT SAMPLING 5V 24SOIC
LT1138ACSW#TRPBF IC 5DRV/3RCV RS232 5V 28-SOIC
AD9613BCPZRL7-170 IC ADC 12BIT SRL 170MSPS 64LFCSP
IDT72225LB25PFI IC FIFO 1024X18 SYNC 25NS 64TQFP
LT1138ACSW#TR IC TXRX 5V RS232 LP CAPS 28SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IDT72225LB25TFI8 功能描述:IC FIFO 1024X18 SYNC 25NS 64TQFP 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
IDT72230L10TP 功能描述:IC FIFO 2KX8 SYNC 10NS 28DIP 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
IDT72230L15TP 功能描述:IC FIFO 2KX8 SYNC 15NS 28DIP 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
IDT72230L25TP 功能描述:IC FIFO 2KX8 SYNC 25NS 28DIP 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
IDT72231L10J 功能描述:IC FIFO SYNC 512X9 10NS 32PLCC 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*