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Description: 按键扫描 51单片机加8279
8279通过74LS 138译码器扩展4×4键盘、6位显示器。
由3-8译码器对SL0～SL2译出键扫描线，由另一3-8译码器译出显示器的位扫描线，并采用了编码扫描方式。
为了防止出现重键现象，扫描输出线高位SL3不参加键扫描译码。CPU对8279的监视采用了查询方式，故8279的中断请求信号IRQ悬空未用。
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Size: 2143 |
Author: qiumh |
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Description: 收集来的74ls系列中文资料功能介绍
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Size: 14328541 |
Author: yangliang |
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Description: 这是一篇关于74LS系列集成块的型号及其功能介绍
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Size: 6285 |
Author: 254180979@qq.com |
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Description:
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Size: 11059 |
Author: auklet@qq.com |
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Description: 74LS系列芯片的比较全的简介,74系列虽然已不是主流,但在一些硬件电路中还是时常见到,其低价格高性能的特点，仍然是电子电路应用中不可缺少的一员.-74LS series chips Compare the profiles, although the 74 Series is not the mainstream, but in some hardware circuit or often see that its high-performance low-cost feature is the electronic circuit applications indispensable one.
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Size: 3072 |
Author: 123 |
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Description: 74LS的引脚大全，不清楚的可以看看！还是不错的哦！-hardware of the pin for it is not clear can see! Still pretty good!
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Size: 22528 |
Author: fangshu |
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Description: 74LS系列使用手册
可以让初学者快速的上手，十分实用-Series hardware manual can be used for beginners to get started quickly, very practical
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Size: 2221056 |
Author: 洋洋 |
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Description: 74LS电路系列名称解释，郑重推荐给大家参考-Circuits 74LS Series title explained solemnly recommend to the U.S. reference
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Size: 6144 |
Author: chenguo |
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Description: CMOS 74系列芯片全部资料之二---74LS系列。
写硬件程序必备的资料！-CMOS 74 tread芯conduct anti 片 全之old woman snapped at slip step tread conduct anti-74LS 。 glass写硬most序hoh-de-sac cavity collapse misstep ！
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Size: 9621504 |
Author: 仙儿 |
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Description: June 1989
54LS00/DM 74LS00
Quad 2-Input NAND Gates
General Description
This device contains four independent gates each of which
performs the logic NAND function.
Features
Y Alternate Military/Aerospace device (54LS00) is avail-
able. Contact a National Semiconductor Sales Office/
Distributor for specifications.
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Size: 8937472 |
Author: 123wj |
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Description: ７４ls１６４的资料，里面有这款芯片的相关介绍与用法-74ls164 information, there are new chips, introduced with the use of related
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Size: 100352 |
Author: yang |
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Description: 74ls系列的中文资料，对与单片机的开发者的使用来说十分方便。-74ls series of Chinese data, the developer with the use of SCM is very convenient.
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Size: 14614528 |
Author: 谢海彬 |
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Description: 74ls系列所有芯片的中文资料，方便查阅-the references of chinese version in 74ls chips
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Size: 10418176 |
Author: 储培 |
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Description: 常用74系列，74LS，74HC系列逻辑门电路-Used 74 series, 74LS, 74HC series logic gates
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Size: 43374592 |
Author: huahua |
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Description: 数字逻辑与系统的关于所有的器件74LS的介绍，功能表-Digital Logic and System devices 74LS on the introduction of all the menu
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Size: 8939520 |
Author: 万淑红 |
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Description: 常用74系列，74LS，74HC系列逻辑门电路-Used 74 series, 74LS, 74HC series logic gate
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Size: 23869440 |
Author: cangmang |
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Description: he Display is an array of 5x24 Leds. I used Shift registers to light up every column, DO NOT USE ANY 74LSXXX TTL. The 74LS is a Low Power TTL that doesn t light up the leds very well. Use the 74HCXXX series or 74FXX series.
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Size: 3072 |
Author: pastora26 |
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Description: 74LS系列的英文数据手册说明，很全，对大家很有帮助-74LS series of English data sheet shows that it is the whole, very helpful to everyone
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Size: 8941568 |
Author: 刘翔 |
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Description: 辛苦收集 史上最全的74系列芯片 汇总包含74HC、74LS等其他芯片-Hard to collect the history of the most complete summary of the 74 series chips include 74HC, 74LS, and other chips
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Size: 25222144 |
Author: abc |
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Description: 74LS series data sheets
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Size: 1893376 |
Author: nocknock
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