{"id":10093,"date":"2026-07-08T08:49:07","date_gmt":"2026-07-08T08:49:07","guid":{"rendered":"https:\/\/materialparts.com\/ch9344l-2\/"},"modified":"2026-07-08T08:49:07","modified_gmt":"2026-07-08T08:49:07","slug":"ch9344l-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ch9344l-2\/","title":{"rendered":"CH9344L"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The WCH (Nanjing Qinheng Microelectronics) CH9344L is a USB to 4xUART bridge, 12Mbps, LQFP-48. It provides a cost-effective solution for USB-to-serial communication in embedded systems.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n12Mbps<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nLQFP-48<\/td>\n<\/tr>\n
Clock Source<\/td>\nInternal crystal<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Full-speed USB 2.0 compatible<\/li>\n
  • Multiple serial protocols supported<\/li>\n
  • Low cost and widely available<\/li>\n
  • Simple external circuit required<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • USB-to-serial adapter cables<\/li>\n
    • Embedded system debug ports<\/li>\n
    • Arduino-compatible boards<\/li>\n
    • Industrial equipment programming interfaces<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The WCH (Nanjing Qinheng Microelectronics) CH9344L is a USB to 4xUART bridge, 12Mbps, LQFP-48. It provides a cost-effective solution for USB-to-serial communication in embedded systems. Key Specifications Data Rate 12Mbps Package LQFP-48 Clock Source Internal crystal Features Full-speed USB 2.0 compatible Multiple serial protocols supported Low cost and widely available Simple external circuit […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[1327],"chip_brand":[283],"class_list":["post-10093","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-ch9344l","chip_brand-wch"],"acf":{"brief_explanation":"USB to 4xUART bridge, 12Mbps, LQFP-48","date_code":"","package_case":"LQFP-48","in_stock":4200,"datasheet":"https:\/\/www.wch.cn\/","price":"$0.35 @ 1ku","product_introduction":"The CH9344L from WCH is a USB-to-UART bridge IC supporting data rates up to 12Mbps in a LQFP-48 package. It provides a cost-effective solution for adding USB connectivity to embedded systems, widely used in Arduino boards and debug interfaces.","working_principle":"The CH9344L implements a USB device controller that enumerates as a virtual COM port on the host PC. USB packets are received and converted to UART serial format. The internal data buffer handles the speed mismatch between USB and UART. Configuration (baud rate, parity, stop bits) is set through the USB driver on the host side.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      V3<\/td>V3<\/td>3.3V internal regulator output<\/td><\/tr>
      TXD<\/td>TXD<\/td>UART transmit output<\/td><\/tr>
      RXD<\/td>RXD<\/td>UART receive input<\/td><\/tr>
      D+<\/td>UD+<\/td>USB D+ signal<\/td><\/tr>
      D-<\/td>UD-<\/td>USB D- signal<\/td><\/tr><\/table>","application_scenarios":"
      • USB-to-serial adapter for embedded programming<\/li>
      • Arduino UNO\/Nano compatible boards<\/li>
      • Industrial equipment service port<\/li>
      • GPS module USB interface<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Rate<\/th>Notes<\/th><\/tr>
        CP2102N-A02-GQFN24<\/td>Silicon Labs<\/td>1Mbps<\/td>Higher quality, higher cost<\/td><\/tr>
        CP2104-F03-GMR<\/td>Silicon Labs<\/td>2Mbps<\/td>Low power version<\/td><\/tr>
        FT232RL<\/td>FTDI<\/td>3Mbps<\/td>Industry standard, expensive<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/10093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=10093"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/10093\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=10093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=10093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=10093"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10093"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}