參數(shù)資料
型號(hào)： 72845LB25PF8
廠(chǎng)商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi)： FIFO
英文描述： 4K X 18 BI-DIRECTIONAL FIFO, 15 ns, PQFP128
封裝： TQFP-128
文件頁(yè)數(shù)： 16/26頁(yè)
文件大?。?/td> 334K
代理商： 72845LB25PF8
23
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
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
OPERATING CONFIGURATIONS
SINGLE DEVICE CONFIGURATION
Each of the two FIFOs contained in a single IDT72805LB/72815LB/
72825LB/72835LB/72845LB may be used as a stand-alone device when
the application requirements are for 256/512/1,024/2,048/4,096 words or
less. These FIFOs are in a single Device Configuration when the First Load
(
FL), Write Expansion In (WXI) and Read Expansion In (RXI) control inputs
are configured as (
FL, RXI, WXI = (0,0,0), (0,0,1), (0,1,0), (1,0,0), (1,0,1) or
(1,1,0) during reset (Figure 28).
Figure 28. Block Diagram of Single 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, 4,096 x 18 Synchronous FIFO
(One of the two FIFOs contained in the IDT72805LB/72815LB/72825LB/72835LB/72845LB)
Figure 29. Block Diagram of the two FIFOs contained in one IDT72805LB/72815LB/72825LB/72835LB/72845LB
configured for a 36-bit Width Expansion
WIDTH EXPANSION CONFIGURATION
Word width may be increased simply by connecting together the control
signals of FIFO A and B. Status flags can be detected from any one device.
The exceptions are the Empty Flag/Output Ready and Full Flag/Input
Ready. Because of variations in skew between RCLK and WCLK, it is
possible for flag assertion and deassertion to vary by one cycle between
FIFOs. To avoid problems the user must create composite flags by gating
the Empty Flags/Output Ready of every FIFO, and separately gating all Full
Flags/Input Ready. Figure 29 demonstrates a 36-word width by using one
IDT72805LB/72815LB/72825LB/72835LB/72845LBs. Any word width can
be attained by adding additional IDT72805LB/72815LB/72825LB/72835LB/
72845LBs. These FIFOs are in a single Device Configuration when the First
Load (
FL), Write Expansion In (WXI) and Read Expansion In (RXI) control
inputs are configured as (
FL, RXI, WXI = (0,0,0), (0,0,1), (0,1,0), (1,0,0),
(1,0,1) or (1,1,0) during reset (Figure 29). Please see the Application Note
AN-83.
WRITE CLOCK (WCLK)
WRITE ENABLE (
WEN)
READ CLOCK (RCLK)
READ ENABLE (
REN)
LOAD (
LD)
OUTPUT ENABLE (
OE)
DATA IN (D0 - D17)
DATA OUT (Q0 - Q17)
FULL FLAG/INPUT READY (
FF/IR)
PROGRAMMABLE (
PAE)
HALF-FULL FLAG (
HF)
EMPTY FLAG/OUTPUT READY (
EF/OR)
PROGRAMMABLE (
PAF)
RESET (
RS)
IDT
72805
72815
72825
72835
72845
3139 drw 28
FL
RXI
WXI
FIFO A OR B
WRITE CLOCK (WCLK)
WRITE ENABLE (
WEN)
READ CLOCK (RCLK)
READ ENABLE (
REN)
LOAD (
LD)
OUTPUT ENABLE (
OE)
DATA IN (D)
DATA OUT (Q)
FULL FLAG/INPUT
READY (
FF/IR)
PROGRAMMABLE (
PAE)
HALF FULL FLAG (
HF)
EMPTY FLAG/OUTPUT
READY (
EF/OR)
PROGRAMMABLE (
PAF)
RESET (
RS)
FIFO A
FIFO B
RESET (
RS)
36
18
FF/IR
EF/OR
3139 drw 29
FL
WXI RXI
FL
WXI RXI
FF/IR
EF/OR
NOTE:
1. Do not connect any output control signals directly together.
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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(pán) 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(fǎng)問(wèn)時(shí)間:15ns 電壓 - 電源:4.5V ~ 5.5V 電流 - 電源（最大值）:60mA 總線(xiàn)方向:雙向 擴(kuò)充類(lèi)型:深度，寬度 可編程標(biāo)志支持:是 中繼能力:無(wú) FWFT 支持:無(wú) 工作溫度:0°C ~ 70°C 安裝類(lèi)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(lèi)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(lèi)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(lèi)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(lèi)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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