{"id":2956,"date":"2026-05-28T15:08:39","date_gmt":"2026-05-28T15:08:39","guid":{"rendered":"https:\/\/materialparts.com\/max3109etjt\/"},"modified":"2026-05-28T15:08:39","modified_gmt":"2026-05-28T15:08:39","slug":"max3109etjt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/max3109etjt\/","title":{"rendered":"MAX3109ETJ+T"},"content":{"rendered":"

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

The MAX3109ETJ+T from Analog Devices (formerly Maxim Integrated) is an advanced dual-channel UART with 128-word FIFOs in a 32-pin TQFN (5 x 5 mm) package. It bridges SPI\/I2C microcontroller buses to asynchronous serial interfaces (RS-485, RS-232, IrDA) with data rates up to 24 Mbps, integrated PLL, and flexible logic-level translation.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n2 (dual UART)<\/td>\n<\/tr>\n
Max Data Rate<\/td>\n24 Mbps<\/td>\n<\/tr>\n
FIFO Depth<\/td>\n128 words (TX and RX)<\/td>\n<\/tr>\n
Controller Interface<\/td>\nSPI (up to 26 MHz) \/ I2C (up to 1 MHz)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.71V to 3.6V<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n1 \u00b5A<\/td>\n<\/tr>\n
GPIOs<\/td>\n8 flexible with 20 mA drive<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTQFN-32 (5 x 5 x 0.75 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Dual UART in a single 5 x 5 mm TQFN package<\/li>\n
  • 128-word TX and RX FIFOs for each channel<\/li>\n
  • SPI up to 26 MHz and I2C Fast Mode Plus up to 1 MHz<\/li>\n
  • Integrated PLL and fractional baud-rate generator<\/li>\n
  • Automatic RTS\/CTS hardware flow control<\/li>\n
  • Automatic XON\/XOFF software flow control<\/li>\n
  • IrDA SIR and MIR encoder\/decoder<\/li>\n
  • 9-bit multidrop mode and special character detection<\/li>\n
  • Logic-level translation on controller and transceiver interfaces<\/li>\n
  • Shutdown and auto-sleep power management modes<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive infotainment systems<\/li>\n
    • Industrial PLCs and PROFIBUS-DP<\/li>\n
    • Power meters and smart grid equipment<\/li>\n
    • Medical systems and point-of-sale terminals<\/li>\n
    • Handheld devices and building automation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX3109ETJ+T from Analog Devices (formerly Maxim Integrated) is an advanced dual-channel UART with 128-word FIFOs in a 32-pin TQFN (5 x 5 mm) package. It bridges SPI\/I2C microcontroller buses to asynchronous serial interfaces (RS-485, RS-232, IrDA) with data rates up to 24 Mbps, integrated PLL, and flexible logic-level translation. Key Specifications Channels […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[165],"class_list":["post-2956","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-adi"],"acf":{"brief_explanation":"Dual UART, 24Mbps, 128-word FIFO, SPI\/I2C, TQFN-32, IrDA","date_code":"","package_case":"TQFN-32 (5.0 x 5.0 x 0.75 mm)","in_stock":3679,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX3109.pdf","price":"$8.63 @ 1ku","product_introduction":"The MAX3109ETJ+T from Analog Devices is an advanced dual SPI\/I2C UART, designed to bridge microcontroller buses to asynchronous serial interfaces such as RS-485, RS-232, and IrDA. Each UART channel features 128-word TX and RX FIFOs that significantly offload the host processor. The integrated PLL and fractional baud-rate generator provide high-resolution programmable baud rates up to 24 Mbps. Independent logic-level translation on both controller and transceiver interfaces ensures compatibility between different voltage domains. With automatic hardware and software flow control, 9-bit multidrop mode, and special character detection, this device simplifies serial communication system design.","working_principle":"The MAX3109ETJ+T operates as a bridge between a host controller (via SPI or I2C) and two independent asynchronous serial channels. The host writes TX data to the TX FIFO through the SPI\/I2C interface, and the UART serializer transmits the data bit-by-bit on the TX pin. Received data on the RX pin is deserialized, checked for errors, and placed in the RX FIFO for the host to read. The fractional baud-rate generator and integrated PLL allow precise baud-rate synthesis from a wide range of reference clocks. The 128-word FIFOs buffer data between the host and serial ports, reducing interrupt frequency. Automatic flow control (RTS\/CTS hardware and XON\/XOFF software) manages data flow without host intervention. The IrDA encoder\/decoder handles SIR and MIR infrared protocols.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>TX0<\/td>Output<\/td>UART0 transmit data<\/td><\/tr>
      2<\/td>RX0<\/td>Input<\/td>UART0 receive data<\/td><\/tr>
      3<\/td>CTS0<\/td>Input<\/td>UART0 clear-to-send input<\/td><\/tr>
      4<\/td>RTS0<\/td>Output<\/td>UART0 request-to-send output<\/td><\/tr>
      5<\/td>GPIO0<\/td>I\/O<\/td>General purpose I\/O<\/td><\/tr>
      6<\/td>GPIO1<\/td>I\/O<\/td>General purpose I\/O<\/td><\/tr>
      7<\/td>GPIO2<\/td>I\/O<\/td>General purpose I\/O<\/td><\/tr>
      8<\/td>GPIO3<\/td>I\/O<\/td>General purpose I\/O<\/td><\/tr>
      9<\/td>TX1<\/td>Output<\/td>UART1 transmit data<\/td><\/tr>
      10<\/td>RX1<\/td>Input<\/td>UART1 receive data<\/td><\/tr>
      11<\/td>CTS1<\/td>Input<\/td>UART1 clear-to-send input<\/td><\/tr>
      12<\/td>RTS1<\/td>Output<\/td>UART1 request-to-send output<\/td><\/tr>
      13-16<\/td>GPIO4-GPIO7<\/td>I\/O<\/td>General purpose I\/O<\/td><\/tr>
      17<\/td>IRQ<\/td>Output<\/td>Interrupt request output<\/td><\/tr>
      18<\/td>RST<\/td>Input<\/td>Reset input (active low)<\/td><\/tr>
      19<\/td>CS\/A0<\/td>Input<\/td>SPI chip select \/ I2C address bit 0<\/td><\/tr>
      20<\/td>MOSI\/A1<\/td>Input<\/td>SPI data in \/ I2C address bit 1<\/td><\/tr>
      21<\/td>MISO\/SDA<\/td>I\/O<\/td>SPI data out \/ I2C data<\/td><\/tr>
      22<\/td>SCLK\/SCL<\/td>Input<\/td>SPI clock \/ I2C clock<\/td><\/tr>
      23<\/td>XIN<\/td>Input<\/td>Crystal oscillator input<\/td><\/tr>
      24<\/td>XOUT<\/td>Output<\/td>Crystal oscillator output<\/td><\/tr>
      25-28<\/td>VCC\/VL\/GND<\/td>Power<\/td>Supply and ground pins<\/td><\/tr>
      29<\/td>LDOEN<\/td>Input<\/td>Internal LDO enable<\/td><\/tr>
      30-32<\/td>VCC\/EP<\/td>Power<\/td>Supply \/ exposed pad (GND)<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial PLCs and PROFIBUS-DP communication systems<\/li>
      • Automotive infotainment requiring multiple serial channels<\/li>
      • Smart grid power meters with RS-485 metering interfaces<\/li>
      • Medical systems needing isolated serial communication<\/li>
      • Point-of-sale terminals with multi-port serial connectivity<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Analog Devices<\/td>MAX3107ETI+T<\/td>TQFN-28<\/td>Single UART, similar feature set<\/td><\/tr>
        Analog Devices<\/td>MAX14830ETI+T<\/td>TQFN-28<\/td>Quad UART, register compatible<\/td><\/tr>
        NXP<\/td>SC16IS752IPW<\/td>TSSOP-28<\/td>Dual UART, SPI\/I2C, 64-byte FIFO<\/td><\/tr>
        TI<\/td>TL16C752CIFN<\/td>PLCC-44<\/td>Dual UART, 64-byte FIFO, parallel interface<\/td><\/tr>
        Exar<\/td>XR20M1172IL24<\/td>QFN-24<\/td>Dual UART, 64-byte FIFO, smaller<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2956","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=2956"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2956\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2956"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}