28 lines
7.0 KiB
Markdown
28 lines
7.0 KiB
Markdown
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title: 缓冲
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updated: 2022-08-08 08:35:55Z
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created: 2022-01-08 13:17:43Z
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---
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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<html><head><meta name="qrichtext" content="1" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><style type="text/css">
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p, li { white-space: pre-wrap; }
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</style></head><body style=" font-family:'微软雅黑'; font-size:9pt; font-weight:400; font-style:normal;">
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt;">数据输出用高速buffer</span><span style=" font-family:'Tahoma'; font-size:10pt; font-weight:600;"> </span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;">NC7SZ126</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;"> 每路都4.7k下拉</span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt;">输入采用的高速开漏buffer，须上拉</span><span style=" font-family:'Tahoma'; font-size:10pt; font-weight:600;"> </span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;">NC7WZ07</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;"> 例中390R上拉</span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">参考USRPX3X0中</span><a href="nyf://entry?itemid=0&file=SPI%2Bbuffer%E7%A4%BA%E4%BE%8B.png"><span style=" font-family:'Tahoma'; font-size:10pt; text-decoration: underline; color:#0000ff;">SPI+buffer示例.png</span></a><span style=" font-family:'Tahoma'; font-size:10pt;"> </span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">带开漏的双路buffer </span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;">SN74LVC2G07 74LVC2G07</span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Consolas'; font-size:10pt; color:#000000;">buffer需根据输入输出以</span><span style=" font-family:'Consolas'; font-size:10pt; color:#000000; background-color:#ffff00;">就近原则</span><span style=" font-family:'Consolas'; font-size:10pt; color:#000000;">优化放置位置</span></p>
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<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;"><br /></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">不带开漏的双路buffer </span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;">SN74LVC2G34</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;"> 可工作至100M，带载能力±24mA</span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;">74HCT2G04GW</span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">有些器件可以当buffer使用</span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;"> SNx4LV245A</span><span style=" font-family:'Arial'; font-size:16pt; font-weight:600;"> </span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">带载能力 -15mA/+24mA，实际是8路三态总线收发器，带方向控制和迟滞比较器，可以重整波形</span></p>
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<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Tahoma'; font-size:10pt; color:#000000;"><br /></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">buffer一般不带电平转换，但宽压、耐压使可【高-低】转换，反之不行</span></p>
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<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Tahoma'; font-size:10pt; color:#000000;"><br /></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Arial'; font-size:16pt; font-weight:600; background-color:#ffff00;">不同buffer带载能力不一样，一般都不会太差</span></p>
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<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Arial'; font-size:16pt; font-weight:600;"><br /></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">优选</span><span style=" font-family:'Arial'; font-size:16pt; font-weight:600; background-color:#ffff00;">速度高100MHz、带载强±20mA、体积小sc70、易采购</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">的器件</span></p>
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<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Tahoma'; font-size:10pt; color:#000000;"><br /></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">施密特触发器</span><span style=" font-family:'Tahoma'; font-size:12pt; font-weight:600; color:#000000;"> SN74AUP1T17 ，74LVC2G14,1G14</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">可用于输出信号整形、缓冲，参考USRPX3X0中</span><a href="nyf://entry?itemid=0&file=SN74AUP1T17%E4%BD%9C%E4%B8%BA%E8%BE%93%E5%87%BA%E7%BC%93%E5%86%B2.png"><span style=" font-family:'Tahoma'; font-size:10pt; text-decoration: underline; color:#0000ff;">SN74AUP1T17作为输出缓冲.png</span></a><span style=" font-family:'Tahoma'; font-size:10pt;"> </span></p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">74LVC</span><span style=" font-family:'Tahoma'; font-size:10pt; color:#000000;">1G14速率可达100MHz，输出电流可达24mA</span></p></body></html>
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