HD74HC490中文資料瑞薩數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)
HD74HC490規(guī)格書(shū)詳情
Description
This circuit contains eight master-slave flip-flops and additional gating to implement two individual 4-bit decade counters. Each decade counter has individual clock, clear and set-to-9 inputs. BCD count sequences of any length up to divide-by-100 may be implemented with a single HD74HC490. Buffering on each output is provided to ensure that suceptibility to collector communication is reduced significantly. The counters have paralle outputs from each counter state so that submultiples of the input count frequency are available for system timing signals.
Features
? High Speed Operation: tpd (Clock to QA) = 13 ns typ (CL = 50 pF)
? High Output Current: Fanout of 10 LSTTL Loads
? Wide Operating Voltage: VCC = 2 to 6 V
? Low Input Current: 1 μA max
? Low Quiescent Supply Current: ICC (static) = 4 μA max (Ta = 25°C)
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
24+ |
DIP |
50 |
詢(xún)價(jià) | ||||
HIT |
23+ |
SOP |
7000 |
絕對(duì)全新原裝!100%保質(zhì)量特價(jià)!請(qǐng)放心訂購(gòu)! |
詢(xún)價(jià) | ||
HITACHI |
2023+ |
SOP14 |
3565 |
全新原廠原裝產(chǎn)品、公司現(xiàn)貨銷(xiāo)售 |
詢(xún)價(jià) | ||
HITACHI |
2023+ |
SOP14 |
50000 |
原裝現(xiàn)貨 |
詢(xún)價(jià) | ||
HIT |
20+ |
SOP14 |
2960 |
誠(chéng)信交易大量庫(kù)存現(xiàn)貨 |
詢(xún)價(jià) | ||
HIT |
2017+ |
SOP20 |
6528 |
只做原裝正品現(xiàn)貨!或訂貨假一賠十! |
詢(xún)價(jià) | ||
HIT |
23+ |
SOP14 |
8560 |
受權(quán)代理!全新原裝現(xiàn)貨特價(jià)熱賣(mài)! |
詢(xún)價(jià) | ||
HIT |
24+ |
SOP14 |
5000 |
全現(xiàn)原裝公司現(xiàn)貨 |
詢(xún)價(jià) | ||
HIT |
23+ |
SOP20 |
5000 |
專(zhuān)注配單,只做原裝進(jìn)口現(xiàn)貨 |
詢(xún)價(jià) | ||
HIT |
SOP14 |
68900 |
原包原標(biāo)簽100%進(jìn)口原裝常備現(xiàn)貨! |
詢(xún)價(jià) |
