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參數資料
| 型號： | 74ACT2708 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 64 x 9 First-In, First-Out Memory |
| 中文描述： | 64 × 9先入先出存儲器 |
| 文件頁數： | 4/13頁 |
| 文件大?。?/td> | 95K |
| 代理商： | 74ACT2708 |
www.fairchildsemi.com
4
7
MODES OF OPERATION
Mode 1: Shift in Sequence for FIFO Empty to Full
Sequence of Operation
1. Input Ready is initially HIGH; HF and FULL flags are
LOW. The FIFO is empty and prepared for valid data.
OR is LOW indicating that the FIFO is not yet ready to
output data.
2. Shift-In is set HIGH, and data is loaded into the FIFO.
Data has to be settled t
s
before the falling edge of SI
and held t
h
after.
3. Input Ready (IR) goes LOW propagation delay t
IR
after
SI goes HIGH: input stage is busy.
4. Shift-In is set LOW; IR goes HIGH indicating the FIFO
is ready for additional data. Data just shifted-in arrives
at output propagation delay t
OD5
after SI falls. OR goes
HIGH propagation delay t
IOR
after SI goes LOW, indi-
cating the FIFO has valid data on its outputs. HF goes
HIGH propagation delay t
IE
after SI falls, indicating the
FIFO is no longer empty.
5. The process is repeated through the 64th data word.
On the rising edge of the 33rd SI, FULL flag goes HIGH
propagation delay t
IHF
after SI, indicating a half-full
FIFO. HF goes LOW propagation delay t
IF
after the ris-
ing edge of the 64th pulse indicating that the FIFO is
full. Any further shift-ins are disabled.
Note:
SO and OE are LOW; MR is HIGH.
FIGURE 1. Modes of Operation Mode 1
相關PDF資料 |
PDF描述 |
|---|---|
| 74ACT2708PC | 64 x 9 First-In, First-Out Memory |
| 74ACT818 | Two 1-Bit LVTTL/GTLP Adj-Edge-Rate Bus Xcvrs w Split LVTTL Port, Fdbk Path and Selectable Polarity 20-TVSOP -40 to 85 |
| 74ACT818SPC | Two 1-Bit LVTTL/GTLP Adj-Edge-Rate Bus Xcvrs w Split LVTTL Port, Fdbk Path and Selectable Polarity 20-SOIC -40 to 85 |
| 74ACTQ02 | CONNECTOR ACCESSORY |
| 74ACTQ02PC | CONNECTOR ACCESSORY |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 74ACT2708 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74ACT2708PC | 功能描述:先進先出 64x9 (先進先出) Memory RoHS:否 制造商:IDT 電路數量: 數據總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| 74ACT273B | 功能描述:觸發(fā)器 USE 512-74ACT273PC RoHS:否 制造商:Texas Instruments 電路數量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
| 74ACT273DWG | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 74ACT273DWR2 | 制造商: 功能描述: 制造商:undefined 功能描述: |
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