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SN54-74LS669中文資料安森美半導體數(shù)據(jù)手冊PDF規(guī)格書
SN54-74LS669規(guī)格書詳情
SYNCHRONOUS 4-BIT UP/DOWN COUNTER
The SN54 /74LS669 is a synchronous 4-bit up/down counter. The LS669 is a 4-bit binary counter. For high speed counting applications, this presettable counter features an internal carry lookahead for cascading purposes. By clocking all flip-flops simultaneously so the outputs change coincident with each other (when instructed to do so by the count enable inputs and internal gating) synchronous operation is provided. This helps to eliminate output counting spikes, normally associated with asynchronous (ripple-clock) count ers. The four master-slave flip-flops are triggered on the rising (positive-going) edge of the clock waveform by a buffered clock input.
? Programmable Look-Ahead Up/Down Binary/Decade Counters
? Fully Synchronous Operation for Counting and Programming
? Internal Look-Ahead for Fast Counting
? Carry Output for n-Bit Cascading
? Fully Independent Clock Circuit
? Buffered Outputs
供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
---|---|---|---|---|---|---|---|
TI/德州儀器 |
24+ |
CDIP |
72 |
原裝現(xiàn)貨假一賠十 |
詢價 | ||
TI/TEXAS |
23+ |
原廠封裝 |
8931 |
詢價 | |||
TI |
23+ |
NA |
20000 |
詢價 | |||
TI |
23+ |
CDIP |
5000 |
全新原裝,支持實單,非誠勿擾 |
詢價 | ||
TI/德州儀器 |
22+ |
CDIP |
12245 |
現(xiàn)貨,原廠原裝假一罰十! |
詢價 | ||
TI |
21+ |
CDIP |
13880 |
公司只售原裝,支持實單 |
詢價 | ||
TI |
24+ |
35200 |
一級代理/放心采購 |
詢價 | |||
TI/德州儀器 |
22+ |
2450 |
公司只做原裝!現(xiàn)貨供應! |
詢價 | |||
TI/德州儀器 |
24+ |
DIP |
66800 |
原廠授權一級代理,專注汽車、醫(yī)療、工業(yè)、新能源! |
詢價 | ||
TI |
2016+ |
DIP |
6528 |
只做原廠原裝現(xiàn)貨!終端客戶個別型號可以免費送樣品! |
詢價 |