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SN54-74LS390中文資料安森美半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)
SN54-74LS390規(guī)格書(shū)詳情
The SN54/74LS390 and SN54/74LS393 each contain a pair of high-speed 4-stage ripple counters. Each half of the LS390 is partitioned into a divide-by-two section and a divide-by five section, with a separate clock input for each section. The two sections can be connected to count in the 8.4.2.1 BCD code or they can count in a biquinary sequence to provide a square wave (50 duty cycle) at the final output.
Each half of the LS393 operates as a Modulo-16 binary divider, with the last three stages triggered in a ripple fashion. In both the LS390 and the LS393, the flip-flops are triggered by a HIGH-to-LOW transition of their CP inputs.
Each half of each circuit type has a Master Reset input which responds to a HIGH signal by forcing all four outputs to the LOW state.
? Dual Versions of LS290 and LS293
? LS390 has Separate Clocks Allowing ÷2, ÷2.5, ÷5
? Individual Asynchronous Clear for Each Counter
? Typical Max Count Frequency of 50 MHz
? Input Clamp Diodes Minimize High Speed Termination Effects
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
TI(德州儀器) |
23+ |
NA/ |
7350 |
現(xiàn)貨供應(yīng),當(dāng)天可交貨!免費(fèi)送樣,原廠技術(shù)支持!!! |
詢價(jià) | ||
TI/德州儀器 |
23+ |
NA/ |
24 |
優(yōu)勢(shì)代理渠道,原裝正品,可全系列訂貨開(kāi)增值稅票 |
詢價(jià) | ||
TI |
2020+ |
CDIP |
80000 |
只做自己庫(kù)存,全新原裝進(jìn)口正品假一賠百,可開(kāi)13%增 |
詢價(jià) | ||
TI |
24+ |
35200 |
一級(jí)代理/放心采購(gòu) |
詢價(jià) | |||
原廠 |
NA |
8650 |
一級(jí)代理 原裝正品假一罰十價(jià)格優(yōu)勢(shì)長(zhǎng)期供貨 |
詢價(jià) | |||
TI/德州儀器 |
22+ |
CDIP |
12245 |
現(xiàn)貨,原廠原裝假一罰十! |
詢價(jià) | ||
TI |
23+ |
CDIP |
3200 |
正規(guī)渠道,只有原裝! |
詢價(jià) | ||
TI/德州儀器 |
22+ |
2450 |
公司只做原裝!現(xiàn)貨供應(yīng)! |
詢價(jià) | |||
TI |
2016+ |
DIP |
6528 |
只做原廠原裝現(xiàn)貨!終端客戶個(gè)別型號(hào)可以免費(fèi)送樣品! |
詢價(jià) | ||
TI |
CDIP |
899933 |
集團(tuán)化配單-有更多數(shù)量-免費(fèi)送樣-原包裝正品現(xiàn)貨-正規(guī) |
詢價(jià) |
