{"id":8749,"date":"2026-06-30T07:06:31","date_gmt":"2026-06-30T07:06:31","guid":{"rendered":"https:\/\/materialparts.com\/cp2102n-a02-gqfn28\/"},"modified":"2026-06-30T07:06:31","modified_gmt":"2026-06-30T07:06:31","slug":"cp2102n-a02-gqfn28","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/cp2102n-a02-gqfn28\/","title":{"rendered":"CP2102N-A02-GQFN28"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The CP2102N-A02-GQFN28 is a Silicon Labs USB-to-UART bridge controller, A02 variant with different GPIO configuration from A01. It shares the same core features: USB 2.0 full-speed, up to 3 Mbps UART, integrated transceiver and oscillator, 1 KB OTP, and 4 configurable GPIO. Packaged in 28-pin QFN (5×5 mm), -40C to +85C.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n
USB<\/td>\nUSB 2.0 Full-Speed<\/td>\n<\/tr>\n
UART Baud Rate<\/td>\nUp to 3 Mbps<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.2 V to 3.6 V<\/td>\n<\/tr>\n
OTP Memory<\/td>\n1 KB<\/td>\n<\/tr>\n
GPIO<\/td>\n4 configurable (A02 config)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nQFN-28 (5×5 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • No firmware development required<\/li>\n
  • USB 2.0 full-speed with integrated transceiver<\/li>\n
  • Up to 3 Mbps UART data rate<\/li>\n
  • 1 KB OTP for custom VID\/PID<\/li>\n
  • A02 GPIO variant configuration<\/li>\n
  • USB Battery Charger Detection<\/li>\n
  • Royalty-free VCP drivers<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB-to-serial adapters<\/li>\n
    • MCU programming interfaces<\/li>\n
    • IoT device connectivity<\/li>\n
    • Industrial USB bridges<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CP2102N-A02-GQFN28 is a Silicon Labs USB-to-UART bridge controller, A02 variant with different GPIO configuration from A01. It shares the same core features: USB 2.0 full-speed, up to 3 Mbps UART, integrated transceiver and oscillator, 1 KB OTP, and 4 configurable GPIO. Packaged in 28-pin QFN (5×5 mm), -40C to +85C. Key Specifications […]<\/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":[],"chip_brand":[184],"class_list":["post-8749","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-silabs"],"acf":{"brief_explanation":"USB-to-UART bridge (A02 variant), USB 2.0 FS, 3Mbps, OTP, QFN-28","date_code":"","package_case":"28-Pin QFN (5.0 x 5.0 x 0.6 mm with exposed pad)","in_stock":6210,"datasheet":"https:\/\/www.silabs.com\/documents\/public\/data-sheets\/cp2102n-datasheet.pdf","price":"$2.83 @ 1pc","product_introduction":"The CP2102N-A02-GQFN28 is a Silicon Labs USB-to-UART bridge controller, A02 variant with a different GPIO default configuration compared to the A01 variant. It provides USB 2.0 full-speed to UART conversion with data rates up to 3 Mbps, requiring no firmware development. The integrated USB transceiver, clock oscillator, and voltage regulator minimize external components. The 1 KB OTP configuration memory allows custom USB descriptors (VID\/PID, product strings). The A02 variant pre-configures GPIO pins with different default functions suited for specific application scenarios. USB Battery Charger Detection per BCS 1.2 is included. Royalty-free VCP drivers support Windows, macOS, and Linux. Packaged in 28-pin QFN (5x5 mm).","working_principle":"The CP2102N-A02 operates identically to the A01 variant. The USB device controller handles enumeration, flow control, and protocol management. The 48 MHz internal oscillator provides the USB clock. The UART controller supports baud rates up to 3 Mbps with configurable data format. The 1 KB OTP stores custom USB descriptors programmed once during manufacturing. The A02 variant differs only in GPIO pin pre-configuration (default functions and pull-up\/down states), which can be further customized through the Silicon Labs configurator tool before OTP programming.","pin_description":"

      Same 28-pin QFN pinout as CP2102N-A01: D+\/D-, VBUS, VREGIN, VDD, GND, TX, RX, RTS, CTS, DTR, DSR, GPIO.0-GPIO.3 (A02 default config), RSTb, SUSPEND\/SUSPENDB. Refer to datasheet for complete 28-pin mapping and A02 GPIO default assignments.<\/p>","application_scenarios":"

      • USB-to-serial adapter with A02 GPIO variant for specific handshake pin routing<\/li>\n
      • MCU debug and programming interface with custom VID\/PID via OTP<\/li>\n
      • IoT device USB connectivity with battery charger detection<\/li>\n
      • Legacy serial equipment USB bridge with A02 GPIO configuration<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        CP2102N-A01-GQFN28<\/td>Silicon Labs<\/td>A01 GPIO variant<\/td><\/tr>
        CP2104-F01-GQFN24<\/td>Silicon Labs<\/td>Smaller QFN-24, fewer GPIO<\/td><\/tr>
        FT232RL<\/td>FTDI<\/td>USB-UART, SSOP-28<\/td><\/tr>
        CH340G<\/td>WCH<\/td>Lower cost, SOP-16<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8749"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8749\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8749"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}