- 您現(xiàn)在的位置：買(mǎi)賣IC網(wǎng) > PDF目錄369304 > 74F525SCX (NATIONAL SEMICONDUCTOR CORP) Programmable Counter PDF資料下載
參數(shù)資料
| 型號(hào)： | 74F525SCX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Programmable Counter |
| 中文描述： | F/FAST SERIES, ASYN POSITIVE EDGE TRIGGERED DOWN DIVIDE BY N COUNTER, PDSO28 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-28 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 184K |
| 代理商： | 74F525SCX |
Timing Diagrams
(Continued)
TL/F/9547–8
FIGURE 4. MODE 6
M
n
e
110
j
With XTR HIGH, the rising edge of CP loads data from the latches to the counter.
k
With XTR LOW, the rising edge of CP begins the count, and Q goes HIGH.
l
When the count reaches zero, Q goes LOW, and Q/2 toggles state. Bringing XTR HIGH before count reaches zero will reload the counter, but not affect Q.
Notes:
Loading N
e
0 halts counter; loading N
e
1 will result in undefined operation.
Pulse width
e
(2/CP)
*
(N
b
1)
TL/F/9547–9
FIGURE 5. MODE 7
M
n
e
111
j
With XTR HIGH, the rising edge of CP, loads data from the latches to the counter.
k
On the falling edge of XTR, the rising edge of CP begins count-down.
l
When count reaches zero, Q goes HIGH for one period of CP, and Q/2 toggles on the Q rising edge.
m
On the rising edge of CP on which Q goes LOW, the counters are reloaded.
n
Count-down begins again.
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F525 | Programmable Counter |
| 74F525PCX | Programmable Counter |
| 74F525QCX | Programmable Counter |
| 74F676SPC | 16-Bit Serial/Parallel-In, Serial-Out Shift Register |
| 74F676SC | 16-Bit Serial/Parallel-In, Serial-Out Shift Register |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F5300 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Fiber optic LED driver |
| 74F5302 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Fiber optic dual LED/clock driver |
| 74F533 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Octal Transparent Latch with TRI-STATE Outputs |
| 74F533_TKH3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F533DC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit D-Type Latch |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。