HD74HC490中文資料日立數(shù)據(jù)手冊PDF規(guī)格書
HD74HC490規(guī)格書詳情
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 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
HIT |
23+ |
SOP14 |
30000 |
代理全新原裝現(xiàn)貨,價(jià)格優(yōu)勢 |
詢價(jià) | ||
HIT |
1922+ |
SOP14 |
6598 |
原裝進(jìn)口現(xiàn)貨庫存專業(yè)工廠研究所配單供貨 |
詢價(jià) | ||
HITACHI/日立 |
03+ |
SOP20 |
92 |
就找我吧!--邀您體驗(yàn)愉快問購元件! |
詢價(jià) | ||
HIT |
23+ |
SOP14 |
8560 |
受權(quán)代理!全新原裝現(xiàn)貨特價(jià)熱賣! |
詢價(jià) | ||
HITACHI/日立 |
23+ |
NA/ |
1380 |
優(yōu)勢代理渠道,原裝正品,可全系列訂貨開增值稅票 |
詢價(jià) | ||
HITACHI/日立 |
23+ |
SOP14 |
98900 |
原廠原裝正品現(xiàn)貨!! |
詢價(jià) | ||
HITACHI/日立 |
23+ |
SOP14 |
50000 |
全新原裝正品現(xiàn)貨,支持訂貨 |
詢價(jià) | ||
HIT |
23+ |
SOP20 |
5000 |
專注配單,只做原裝進(jìn)口現(xiàn)貨 |
詢價(jià) | ||
HIT |
23+ |
SOP20 |
20000 |
原廠原裝正品現(xiàn)貨 |
詢價(jià) | ||
HITACHI/日立 |
23+ |
SOP5.2 |
3531 |
一級代理原廠VIP渠道,專注軍工、汽車、醫(yī)療、工業(yè)、 |
詢價(jià) |
