AT48801中文资料爱特梅尔数据手册PDF规格书-114ic电子网

<!DOCTYPE html> <html> <head>  <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge, chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"> <meta name="format-detection" content="telephone=no" /> <title>AT48801中文资料爱特梅尔数据手册PDF规格书-114ic电子网</title> <meta name="keywords" content="AT48801,AT48801中文资料,AT48801数据手册,Atmel"> <meta name="description" content="AT48801数据手册PDF,爱特梅尔公司中文资料pdf Datasheet,Atmel Corporation规格书,数据表,引脚功能,爱特梅尔公司电子元器件使用手册,爱特梅尔供应商,AT48801价格,8 Bit Spread- Spectrum Microcontroller,设计实例"> <link rel="stylesheet" type="text/css" href="https://oss.114ic.com/layuiadmin/layui/css/layui.css"> <link rel="stylesheet" type="text/css" href="https://oss.114ic.com/js/swiper/swiper.min.css"> <link rel="stylesheet" type="text/css" href="https://oss.114ic.com/css3w/global.css"> <link rel="stylesheet" type="text/css" href="https://oss.114ic.com/css3w/style.css"> <script type="text/javascript" src="https://oss.114ic.com/layuiadmin/layui/layui.js"></script> <script type="text/javascript" src="https://oss.114ic.com/js/jquery.min.js"></script> <script type="text/javascript" src="https://oss.114ic.com/js/swiper/swiper.min.js"></script> <script type="text/javascript" src="https://oss.114ic.com/js3w/main.js"></script> <script type="text/javascript" src="https://oss.114ic.com/js/tw.js"></script> </head> <body> <div class="header"> <div class="head_wrap"></div> <div class="head clear"> <div class="wrap"> <div id="headflt" class="flt">您好，欢迎来到114ic电子网！ <span class="login bg_icon"><a rel="nofollow" title="登录" target="_blank" href="https://member.114ic.com/member/login.asp">登录</a>，<a rel="nofollow" target="_blank" title="QQ快捷登录" href="https://member.114ic.com/member/loginqqapi.asp">QQ登录</a>，<a title="注册" target="_blank" href="https://member.114ic.com/reg/">免费注册</a></span></div> <div class="head_nav frt"> <ul> <li> <a rel="nofollow" title="旗下网站" href="javascript:void(0)">旗下网站<i class="bg_icon"></i></a> <div class="drop"> <ul> <li><a title="ic资料网" target="_blank" href="https://www.114ic.cn">ic资料网</a></li> </ul> </div> </li> <li><a id="zh_tran" rel="nofollow" title="繁体简体转换" href="#" onclick="zh_tran('t');" >繁体中文</a></li> <li><a title="网站地图" href="/about/sitemap.html">网站地图</a></li> <li><a rel="nofollow" title="会员套餐" href="/about/memberfunction.html#0183;3456:443;29177">会员套餐</a></li> <li><a rel="nofollow" title="广告服务" href="/about/ad.html">广告服务</a></li> <li><a rel="nofollow" title="付款方式" href="/about/pay.html">付款方式</a></li> <li><a rel="nofollow" title="联系我们" href="/about/contact.html">联系我们</a></li> <li><a rel="nofollow" title="在线咨询" href="/about/book/">在线咨询</a></li> <li><a rel="nofollow" title="诚信监督" href="/about/creditservice.html">诚信监督</a></li> </ul> </div> </div> </div> <div class="wrap"> <div class="logo flt"> <a href="/" title="114ic电子网"> <img src="https://oss.114ic.com/img/logo.png" alt="114ic电子网"></a> </div> <div class="menu frt"> <ul> <li><a href="/" title="首页">首页</a></li> <li><a href="/info/list1.html" title="商情资讯">商情资讯<i class="bg_icon down"></i></a></li> <li><a href="/fair/" title="电子展会">电子展会<i class="bg_icon down"></i></a></li> <li><a href="/hotic3/" title="IC芯片/元器件">芯片/元器件<i class="bg_icon down"></i></a></li> <li><a href="/especial/" title="IC芯片采购"><span class="bg_icon hot"></span>采购信息<i class="bg_icon down"></i></a></li> <li><a href="/company/" title="IC芯片供应商">芯片供应商</a></li> <li class="on"><a href="/pdf/" title="IC芯片规格书技术资料">技术资料<i class="bg_icon down"></i></a></li> </ul> </div> <div class="menu_wrap"></div> <div class="clear"></div> </div> </div> <div class="mainer"> <div class="wrap"> <form id="search" name="search" method="post" action="/stock/search.html" > <div class="search_flex"> <div class="search_box"> <div class="select"> <span>PDF资料</span> <i class="bg_icon down"></i> <input type="hidden" id="searchsort" name="searchsort" value="2" /> <div class="drop"> <ul> <li data-type="1">IC/元器件</li> <li data-type="2">PDF资料</li> <li data-type="3">商情资讯</li> <li data-type="4">丝印</li> </ul> </div> </div> <div class="sel_input"> <input type="text" placeholder="请输入型号或关键词" id="key" name="key" value="AT48801" class="select_inp" autocomplete="off" /> <label class="lbl exact">精确</label> </div> <div class="sel_btn"> <input type="hidden" class="exactprefix" name="exactprefix" value=""> <input type="submit" id="submit" name="submit" value="搜索" /> </div> <div class="drop2"> <div class="box box0"> </div> <div class="box box1"> </div> </div> <div class="search_hot"> <ul> <li><a title="IC芯片现货库存" href="/hotic3/">IC现货库存</a></li> <li><a title="CS5765NGO" href="/cs5765ngo/">CS5765NGO</a></li><li><a title="CS5755MTO" href="/cs5755mto/">CS5755MTO</a></li><li><a title="AR0132AT6C00XPEA0DPBR1" href="/ar0132at6c00xpea0dpbr1/">AR0132AT6C00XPEA0DPBR1</a></li><li><a title="OV4689-H67A" href="/ov4689-h67a/">OV4689-H67A</a></li><li><a title="ADS1114IRUGR" href="/ads1114irugr/">ADS1114IRUGR</a></li> </ul> </div> </div> <div class="sel_btn2"> <a title="发布紧急采购" rel="nofollow" onclick="window.open("/especial-c0/?key=AT48801")" href="javascript:"><span class="bg_icon shopcart"></span>发布紧急采购</a> </div> </div> </form> <div class="page_pos"> <p class="bg_icon"><a title="首页" href="/">首页</a>><a href="/at48801/">AT48801</a>>规格书详情</p> </div> <div class="pdf_details"> <div class="det_box"> <h1>AT48801中文资料爱特梅尔数据手册PDF规格书</h1> <div class="flex"> <div class="img"><img alt="AT48801" src="https://oss.114ic.com/img3w/pdf141156.png" /></div> <div class="tab2 flex1"> <table> <tr> <td>厂商型号</td> <td> <h3>AT48801</h3> </td> </tr> <tr> <td>功能描述</td> <td><p>8 Bit Spread- Spectrum Microcontroller</p> </td> </tr><tr> <td>文件大小</td> <td> <p><strong>429.9 Kbytes</strong></p> </td> </tr> <tr> <td>页面数量</td> <td> <p><strong>17</strong> 页</p> </td> </tr> <tr> <td>生产厂商</td> <td>Atmel Corporation</td> </tr> <tr> <td>企业简称</td> <td> <p> <span class='f_dblue'>Atmel</span>【<span class='f_dblue'>爱特梅尔</span>】 </p> </td> </tr> <tr> <td>中文名称</td> <td><p>爱特梅尔公司<a class="ml10" rel="nofollow" target="_blank" title="Atmel官网" href="http://www.atmel.com/">官网</a></p></td> </tr> <tr> <td>原厂标识</td> <td><a title="Atmel" href="/brand/20.html"><img src="https://img.114ic.com/brands/atmel.jpg" /></a></td> </tr> <tr> <td>数据手册</td> <td><p><a rel="nofollow" class="download" title="AT48801技术资料" onClick="window.open("http://www.alldatasheet.com/datasheet-pdf/pdf/56159/Atmel/AT48801.html")" href="javascript:">下载地址一</a><a rel="nofollow" class="download" title="AT48801资料深度搜索" onClick="window.open("https://www.alldatasheet.com/view.jsp?Searchword=AT48801")" href="javascript:">下载地址二</a><a rel="nofollow" class="download" title="AT48801技术资料" onClick="window.open("https://www.microchip.com/en-us/search?searchQuery=AT48801&category=ALL&fq=start%3D0%26rows%3D10")" href="javascript:">到原厂下载</a></p></td> </tr> <tr> <td>更新时间</td> <td><p>2025-3-29 17:02:00</p></td> </tr> <tr> <td>人工找货</td> <td><p>AT48801价格和库存，欢迎联系客服<a rel="nofollow" target="_blank" title="AT48801人工找货" href="/especial-c0/?key=AT48801">免费人工找货</a></p></td> </tr> </table> </div> </div> </div> <div class="det_rt box"> <div class="page_tit tit2"> <i class="bg_icon icon5"></i> <h3>相关芯片规格书</h3> <a title="AT48801芯片规格书" href="/at48801/pdf.html" class="more">更多</a> </div> <div class="list9"> <ul><li><a title="AT488 PDF" href="/at488/pdf-7440867.html">AT488</a></li> <li><a title="AT488 PDF" href="/at488/pdf-7439245.html">AT488</a></li> <li><a title="AT487 PDF" href="/at487/pdf-7440866.html">AT487</a></li> <li><a title="AT487 PDF" href="/at487/pdf-7439244.html">AT487</a></li> <li><a title="AT486 PDF" href="/at486/pdf-7440865.html">AT486</a></li> <li><a title="AT486 PDF" href="/at486/pdf-7439243.html">AT486</a></li> <li><a title="AT485 PDF" href="/at485/pdf-7440864.html">AT485</a></li> <li><a title="AT485 PDF" href="/at485/pdf-7439242.html">AT485</a></li> <li><a title="AT484 PDF" href="/at484/pdf-9400788.html">AT484</a></li> <li><a title="AT484 PDF" href="/at484/pdf-7440863.html">AT484</a></li> <li><a title="AT484 PDF" href="/at484/pdf-7439241.html">AT484</a></li> <li><a title="AT480S58 PDF" href="/at480s58/pdf-7507619.html">AT480S58</a></li> <li><a title="AT480 PDF" href="/at480/pdf-9400787.html">AT480</a></li> <li><a title="AT480 PDF" href="/at480/pdf-7507618.html">AT480</a></li> <li><a title="AT480 PDF" href="/at480/pdf-7440862.html">AT480</a></li> <li><a title="AT480 PDF" href="/at480/pdf-7439240.html">AT480</a></li> <li><a title="AT477 PDF" href="/at477/pdf-9475209.html">AT477</a></li> <li><a title="AT477 PDF" href="/at477/pdf-7440861.html">AT477</a></li> </ul> </div> </div> </div> <div class="page_box"> <div class="page_title2"> <h3>AT48801规格书详情</h3> </div> <div class="details_text con20"> <p> Description</p> <p> The AT48801 is a low-power, high-performance CMOS 8 bit microcomputer with 8K bytes on-board program memory. The device is compatible with the industry standard 80C51 and 80C52 instruction set and pinout. The Atmel AT48801 is a powerful microcomputer which provides a highly flexible and cost effective solution to spread-spectrum applications.</p> <p> Features</p> <p> • Compatible with MCS-51™ Products</p> <p> • 8K bytes of On-Board Program Memory</p> <p> • Fully Static Operation: 0 Hz to 16 MHz</p> <p> • 256 x 8 Bit Internal RAM</p> <p> • 32 Programmable I/O Lines</p> <p> • Three 16 Bit Timer/Counters</p> <p> • Eight Interrupt Sources</p> <p> • Programmable Serial Channel</p> <p> • Low Power Idle and Power Down Modes</p> </div> </div> <div class="det_tag tab4 tab_wap"> <table> <tr> <th>供应商</th> <th>型号</th> <th>品牌</th> <th>批号</th> <th>封装</th> <th>库存</th> <th>备注</th> <th>价格</th> </tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市振宏微科技有限公司" href="https://zhw02.114ic.com">深圳市振宏微科技有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-10793612.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">中科微</div></td> <td data-label="批号"><div class="con p1">23+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">28000</div></td> <td data-label="备注"><div class="con p1">原装正品</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://zhw02.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市胜彬电子有限公司" href="https://sbdz88.114ic.com">深圳市胜彬电子有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-10198944.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">ATMEL</div></td> <td data-label="批号"><div class="con p1">22+</div></td> <td data-label="封装"><div class="con p1">MSOP-8</div></td> <td data-label="库存"><div class="con p1">8000</div></td> <td data-label="备注"><div class="con p1">原装正品支持实单</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://sbdz88.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市创新迹电子有限公司" href="https://cxjdz01.114ic.com">深圳市创新迹电子有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-11936449.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">量大可定AT</div></td> <td data-label="批号"><div class="con p1">23+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">6000</div></td> <td data-label="备注"><div class="con p1">专注配单,只做原装进口现货</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://cxjdz01.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市壹芯创科技有限公司" href="https://yxckj.114ic.com">深圳市壹芯创科技有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890" href="https://www.114ic.com/at4890/hotic5-2212752.html">AT4890</a></span></div></td> <td data-label="品牌"><div class="con p1">AT</div></td> <td data-label="批号"><div class="con p1">22+</div></td> <td data-label="封装"><div class="con p1">原厂原封</div></td> <td data-label="库存"><div class="con p1">8200</div></td> <td data-label="备注"><div class="con p1">全新原装现货!自家库存!</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890询价" href="https://yxckj.114ic.com/order/?keywords=AT4890">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市科芯源微电子有限公司" href="https://kexinyuanwei.114ic.com">深圳市科芯源微电子有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-12724671.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">中科微</div></td> <td data-label="批号"><div class="con p1">25+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">695</div></td> <td data-label="备注"><div class="con p1">原装正品,欢迎来电咨询!</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://kexinyuanwei.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市创盛芯科技有限公司" href="https://csxkj.114ic.com">深圳市创盛芯科技有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-9375552.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">ATMEL/爱特梅尔</div></td> <td data-label="批号"><div class="con p1">24+</div></td> <td data-label="封装"><div class="con p1">MSOP-8</div></td> <td data-label="库存"><div class="con p1">7500</div></td> <td data-label="备注"><div class="con p1">原装现货假一赔十</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://csxkj.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市纳艾斯科技有限公司" href="https://naaisi.114ic.com">深圳市纳艾斯科技有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-4715329.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">中科微</div></td> <td data-label="批号"><div class="con p1">2020+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">80000</div></td> <td data-label="备注"><div class="con p1">只做自己库存,全新原装进口正品假一赔百,可开13%增</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://naaisi.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市永贝尔科技有限公司" href="https://everbell01.114ic.com">深圳市永贝尔科技有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT48801" href="https://www.114ic.com/at48801/hotic5-6855594.html">AT48801</a></span></div></td> <td data-label="品牌"><div class="con p1">ATMEL</div></td> <td data-label="批号"><div class="con p1">23+</div></td> <td data-label="封装"><div class="con p1">原厂原包</div></td> <td data-label="库存"><div class="con p1">19960</div></td> <td data-label="备注"><div class="con p1">只做进口原装终端工厂免费送样</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT48801询价" href="https://everbell01.114ic.com/order/?keywords=AT48801">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="深圳市科恒伟业电子有限公司" href="https://hemudakeji.114ic.com">深圳市科恒伟业电子有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-2007502.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">AT</div></td> <td data-label="批号"><div class="con p1">1742+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">98215</div></td> <td data-label="备注"><div class="con p1">只要网上有绝对有货!只做原装正品!</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://hemudakeji.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> <tr> <td data-label="供应商"><div class="con p1c"><a target="_blank" title="中天科工半导体（深圳）有限公司" href="https://whgj668.114ic.com">中天科工半导体（深圳）有限公司</a></div></td> <td data-label="型号"><div class="con p1c"><span><a target="_blank" title="AT4890MM" href="https://www.114ic.com/at4890mm/hotic5-4624967.html">AT4890MM</a></span></div></td> <td data-label="品牌"><div class="con p1">量大可定AT</div></td> <td data-label="批号"><div class="con p1">20+</div></td> <td data-label="封装"><div class="con p1">MSOP8</div></td> <td data-label="库存"><div class="con p1">49000</div></td> <td data-label="备注"><div class="con p1">原装优势主营型号-可开原型号增税票</div></td> <td data-label="询价"><a target="_blank" rel="nofollow" class="btn-1" title="AT4890MM询价" href="https://whgj668.114ic.com/order/?keywords=AT4890MM">询价</a></td></tr> </table> </div> <div class="list_more"><a title="AT48801供应商" href="/at48801/" class="btn">更多AT48801供应商<i class="bg_icon icon_more"></i></a> </div> <div class="page_box"> <div class="page_title2"> <h3><i class="bg_icon tit5"></i>相关库存</h3> <a title="a开始型号索引" href="/a/" class="more">更多</a> </div> <ul class="ul_list1"> <li><a title="AT477" href="/at477/">AT477</a></li> <li><a title="AT476" href="/at476/">AT476</a></li> <li><a title="AT476" href="/at476/">AT476</a></li> <li><a title="AT476" href="/at476/">AT476</a></li> <li><a title="AT475RATR15_SZ" href="/at475ratr15_sz/">AT475RATR15_SZ</a></li> <li><a title="AT475RATR12_SZ" href="/at475ratr12_sz/">AT475RATR12_SZ</a></li> <li><a title="AT475RATR10_SZ" href="/at475ratr10_sz/">AT475RATR10_SZ</a></li> <li><a title="AT48801-16QC" href="/at48801-16qc/">AT48801-16QC</a></li> <li><a title="AT48801-16QI" href="/at48801-16qi/">AT48801-16QI</a></li> </ul> </div> </div> </div> <div class="footer"> <div class="wrap"> <div class="foot"> <div class="foot_lt item"> <div class="logo"> <a title="首页" href="/"><img src="https://oss.114ic.com/img3w/logo_fff.png"></a> </div> <div class="f_qq"> <span>客户服务</span><a rel="nofollow" href="tencent://message/?Uin=524172589&Site=114ic电子网&Menu=yes"></a> <span>网站合作</span><a rel="nofollow" href="tencent://message/?Uin=164055401&Site=114ic电子网&Menu=yes"></a> </div> </div> <div class="foot_list item"> <ul> <li><a rel="nofollow" href="/about/memberfunction.html">会员套餐</a></li> <li><a rel="nofollow" href="/about/ad.html">广告服务</a></li> <li><a rel="nofollow" href="/about/escrow.html">委托交易</a></li> <li><a rel="nofollow" href="/about/job.html">诚聘精英</a></li> <li><a rel="nofollow" href="/about/caution/">黑名单</a></li> <li><a rel="nofollow" href="/about/about.html">关于我们</a></li> <li><a rel="nofollow" href="/about/pay.html">付款方式</a></li> <li><a rel="nofollow" href="/about/contact.html">联系我们</a></li> <li><a rel="nofollow" class="b-r-s-r" href="/about/book/">在线咨询</a></li> </ul> </div> <div class="add_list"> <ul> <li><p>Tel：+86-755-8246-9263</p></li> <li><p>Email：114ic＠114ic.com</p></li> <li><p>投诉建议：web＠114ic.com</p></li> </ul> </div> </div> </div> <div class="copyright"> <p>Copyright © 2003-2025 114ic.com All Rights Reserved <a rel="nofollow" target="_blank" href="https://beian.miit.gov.cn/">粤ICP备05011613号</a> <a rel="nofollow" target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=44030402000933">粤公网安备 44030402000933号</a> </p> </div> </div> <script src="https://oss.114ic.com/js/total.js" type="text/javascript"></script> </body></html>

CINXE.COM

AT48801中文资料爱特梅尔数据手册PDF规格书-114ic电子网