參數(shù)資料
型號(hào)： 72845LB25PF8
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： FIFO
英文描述： 4K X 18 BI-DIRECTIONAL FIFO, 15 ns, PQFP128
封裝： TQFP-128
文件頁(yè)數(shù)： 17/26頁(yè)
文件大?。?/td> 334K
代理商： 72845LB25PF8
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72805LB/72815LB/72825LB/72835LB/72845LB CMOS Dual SyncFIFOTM
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
24
Figure 30. Block Diagram of 8,192 x 18 Synchronous
FIFO Memory With Programmable Flags used in Depth Expansion Configuration
DEPTH EXPANSION CONFIGURATION — DAISY CHAIN TECHNIQUE
(WITH PROGRAMMABLE FLAGS)
These devices can easily be adapted to applications requiring more than
256/512/1,024/2,048/4,096 words of buffering. Figure 30 shows Depth
Expansion using one IDT72805LB/72815LB/72825LB/72835LB/72845LBs.
Maximum depth is limited only by signal loading. Follow these steps:
1.ThefirstdevicemustbedesignatedbygroundingtheFirstLoad(
FL)controlinput.
2. All other devices must have
FL in the HIGH state.
3. The Write Expansion Out (
WXO) pin of each device must be tied to the
Write Expansion In (
WXI) pin of the next device. See Figure 30.
4. The Read Expansion Out (
RXO) pin of each device must be tied to the
Read Expansion In (
RXI) pin of the next device. See Figure 30.
5. All Load (
LD) pins are tied together.
6. The Half-Full flag (
HF) is not available in this Depth Expansion
Configuration.
7.
EF, FF, PAE, and PAF are created with composite flags by ORing
together every respective flags for monitoring. The composite
PAE and
PAF flags are not precise.
8. In Daisy Chain mode, the flag outputs are single register-buffered and
the partial flags are in asynchronous timing mode.
LOAD
WRITE CLOCK
WRITE ENABLE
READ CLOCK
READ ENABLE
OUTPUT ENABLE
DATA IN
DATA OUT
RESET
FIRST LOAD (
FL)
Vcc
WXOA
WXIA
RXOA
RXIA
WXOB
WXIB
RXOB
RXIB
IDT72845
FFA/IRA
PAFA
EFA/ORA
PAEA
PAFB
PAEB
EF/OR
PAE
FF/IR
PAF
3139 drw 30
RCLKB
RENB
OEB
WCLKB
WENB
RSB
FLA
RCLKA
RENA
OEA
WCLKA
WENA
RSA
LDA
DAn
QAn
DBn
QBn
LDB
FIFO A
4,096 x 18
FIFO B
4,096 x 18
FFA/IRA EFA/ORA
相關(guān)PDF資料
PDF描述
72T3655L5BBGI 2K X 36 OTHER FIFO, 3.6 ns, PBGA208
72V275L15PF8 32K X 18 OTHER FIFO, 10 ns, PQFP64
72V285L10PF8 64K X 18 OTHER FIFO, 6.5 ns, PQFP64
72V285L15TFI9 64K X 18 OTHER FIFO, 10 ns, PQFP64
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
72845LB25PF9 功能描述:IC FIFO SYNC DL 4096X18 128TQFP 制造商:idt, integrated device technology inc 系列:7200 包裝:托盤 零件狀態(tài):最後搶購(gòu) 存儲(chǔ)容量:144K（4K x 18 x 2） 功能:同步 數(shù)據(jù)速率:40MHz 訪問時(shí)間:15ns 電壓 - 電源:4.5V ~ 5.5V 電流 - 電源（最大值）:60mA 總線方向:雙向 擴(kuò)充類型:深度，寬度 可編程標(biāo)志支持:是 中繼能力:無 FWFT 支持:無 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:128-LQFP 供應(yīng)商器件封裝:128-TQFP（14x20） 標(biāo)準(zhǔn)包裝:1,000
72846-204LF 功能描述:I/O 連接器 72846-204LF-SOFIX POWER KIT RoHS:否 制造商:Hirose Connector 產(chǎn)品:Plugs 系列:DH 端口數(shù)量: 位置/觸點(diǎn)數(shù)量:51 節(jié)距:1 mm 觸點(diǎn)電鍍: 觸點(diǎn)材料: 型式:Male 電流額定值:0.5 A 安裝風(fēng)格:Cable 端接類型:IDC 顏色: 安裝角:
72846-205LF 功能描述:I/O 連接器 72846-205LF-SOFIX POWER KIT RoHS:否 制造商:Hirose Connector 產(chǎn)品:Plugs 系列:DH 端口數(shù)量: 位置/觸點(diǎn)數(shù)量:51 節(jié)距:1 mm 觸點(diǎn)電鍍: 觸點(diǎn)材料: 型式:Male 電流額定值:0.5 A 安裝風(fēng)格:Cable 端接類型:IDC 顏色: 安裝角:
72-8470 制造商:Tenma 功能描述:Portable 2-Channel 20MHz Oscilloscope with True RMS Multimeter 制造商:TENMA 功能描述:OSCILLOSCOPE, HAND-HELD, 2-CHAN, 20MHZ, 100MSPS; Scope Type:Hand Held; Scope Channels:2 Digital; Bandwidth:20MHz; Meter Display Type:TFT-LCD Colour; Sampling Rate:100MSPS; Input Impedance:10Mohm; Rise Time:17.5ns; Input Voltage:400V
72847-202LF 功能描述:高速/模塊連接器 SOFIX POWER KIT RoHS:否 制造商:Molex 系列:iPass 產(chǎn)品類型: 排數(shù): 列數(shù): 位置/觸點(diǎn)數(shù)量:38 安裝角:Right 節(jié)距:0.8 mm 安裝風(fēng)格:Plug 端接類型:SMD/SMT 外殼材料:Thermoplastic 觸點(diǎn)材料:High Performance Alloy (HPA) 觸點(diǎn)電鍍:Gold
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