- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10071 > IDT72251L25PFI8 (IDT, Integrated Device Technology Inc)IC FIFO SYNC 512X9 25NS 32QFP PDF資料下載
參數(shù)資料
| 型號(hào)： | IDT72251L25PFI8 |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FIFO SYNC 512X9 25NS 32QFP |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 系列： | 7200 |
| 功能： | 同步 |
| 存儲(chǔ)容量： | 72K（8K x 9） |
| 訪問時(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： | 32-LQFP |
| 供應(yīng)商設(shè)備封裝： | 32-TQFP（7x7） |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 72251L25PFI8 |
13
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72421/72201/72211/72221/72231/72241/72251 CMOS SyncFIFO
64 x 9, 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9
configuration,theWriteEnable2/Load(WEN2/LD)pinissetLOWatResetso
thatthepinoperatesasacontroltoloadandreadtheprogrammableflagoffsets.
DEPTH EXPANSION - The IDT72421/72201/72211/72221/72231/72241/
72251 can be adapted to applications when the requirements are for greater
than 64/256/512/1,024/2,048/4,096/8,192 words. The existence of two
enable pins on the read and write port allow depth expansion. The Write
Enable 2/Load pin is used as a second write enable in a depth expansion
configurationthustheProgrammableflagsaresettothedefaultvalues. Depth
expansion is possible by using one enable input for system control while the
otherenableinputiscontrolledbyexpansionlogictodirecttheflowofdata. A
typicalapplicationwouldhavetheexpansionlogicalternatedataaccessfrom
one device to the next in a sequential manner. These devices operate in the
DepthExpansionconfigurationwhenthefollowingconditionsaremet:
1. The WEN2/ LD pin is held HIGH during Reset so that this pin operates a
secondWriteEnable.
2. External logic is used to control the flow of data.
Please see the Application Note "DEPTH EXPANSION OF IDT'S SYN-
CHRONOUSFIFOsUSINGTHERINGCOUNTERAPPROACH"fordetails
ofthisconfiguration.
Figure 15. Block Diagram of 64 x 18, 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, 4,096 x 18, 8,192 x 18
Synchronous FIFO Used in a Width Expansion Configuration
OPERATINGCONFIGURATIONS
SINGLE DEVICE CONFIGURATION
AsingleIDT72421/72201/72211/72221/72231/72241/72251maybeused
when the application requirements are for 64/256/512/1,024/2,048/4,096/
8,192wordsorless.WhentheseFIFOsareinaSingleDeviceConfiguration,
the Read Enable 2 (REN2) control input can be grounded (see Figure 14). In
thisconfiguration,theWriteEnable2/Load(WEN2/LD)pinissetLOWatReset
so that the pin operates as a control to load and read the programmable flag
offsets.
WIDTH EXPANSION CONFIGURATION
Wordwidthmaybeincreasedsimplybyconnectingthecorrespondinginput
controlssignalsofmultipledevices. Acompositeflagshouldbecreatedforeach
oftheendpointstatusflags(EFandFF). Thepartialstatusflags(AEandAF)
can be detected from any one device. Figure 15 demonstrates a 18-bit word
width by using two IDT72421/72201/72211/72221/72231/72241/72251s.
AnywordwidthcanbeattainedbyaddingadditionalIDT72421/72201/72211/
72221/72231/72241/72251s.
When these FIFOs are in a Width Expansion Configuration, the Read
Enable 2 (REN2) control input can be grounded (see Figure 15). In this
Figure 14. Block Diagram of Single 64 x 9, 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9 Synchronous FIFO
DATA OUT (Q0 - Q8)
DATA IN (D0 - D8)
RESET (
RS)
READ CLOCK (RCLK)
READ ENABLE 1 (
REN1)
OUTPUT ENABLE (
OE)
EMPTY FLAG (
EF)
PROGRAMMABLE ALMOST-EMPTY (
PAE)
READ ENABLE 2 (
REN2)
WRITE CLOCK (WCLK)
WRITE ENABLE 1 (
WEN1)
WRITE ENABLE 2/LOAD (WEN2/
LD)
FULL FLAG (
FF)
PROGRAMMABLE ALMOST-FULL (
PAF)
IDT
72421
72201
72211
72221
72231
72241
72251
2655 drw 16
DATA IN (D)
WRITE CLOCK (WCLK)
18
9
RESET (
RS)
READ CLOCK (RCLK)
DATA OUT (Q)
9
18
READ ENABLE 2 (
REN2)
READ ENABLE 2 (
REN2)
WRITE ENABLE1 (
WEN1)
FULL FLAG (
FF) #1
PROGRAMMABLE (
PAF)
PROGRAMMABLE (
PAE)
EMPTY FLAG (
EF) #2
OUTPUT ENABLE (
OE)
READ ENABLE1 (
REN1)
9
WRITE ENABLE2/LOAD (WEN2/
LD)
IDT
72421
72201
72211
72221
72231
72241
72251
FULL FLAG (
FF) #2
EMPTY FLAG (
EF) #1
RESET (
RS)
IDT
72421
72201
72211
72221
72231
72241
72251
2655 drw 17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IDT72251L15PF8 | IC FIFO SYNC 512X9 15NS 32QFP |
| IDT72245LB25J8 | IC FIFO 1024X18 SYNC 25NS 68PLCC |
| AD7870AJNZ | IC ADC 12BIT SAMPLING 3V 24-DIP |
| VI-26K-MX-F4 | CONVERTER MOD DC/DC 40V 75W |
| VI-26K-MX-F3 | CONVERTER MOD DC/DC 40V 75W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IDT72255LA10PF | 功能描述:IC FIFO SUPERSYNC 8KX18 64QFP 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 |
| IDT72255LA10PF8 | 功能描述:IC FIFO 8KX18 LP 10NS 64QFP 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 |
| IDT72255LA10PFG | 功能描述:IC FIFO 8KX18 LP 10NS 64QFP RoHS:是 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 |
| IDT72255LA10PFG8 | 功能描述:IC FIFO 8KX18 LP 10NS 64QFP RoHS:是 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 |
| IDT72255LA10TF | 功能描述:IC FIFO 8KX18 LP 10NS 64QFP 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。