{"id":5860,"date":"2026-06-11T06:00:29","date_gmt":"2026-06-11T06:00:29","guid":{"rendered":"https:\/\/materialparts.com\/mcp23017t-e-ml\/"},"modified":"2026-06-12T02:44:29","modified_gmt":"2026-06-12T02:44:29","slug":"mcp23017t-e-ml","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/mcp23017t-e-ml\/","title":{"rendered":"MCP23017T-E\/ML"},"content":{"rendered":"

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

The MCP23017T-E\/ML from Microchip is a 16-bit I2C I\/O expander with 1.7MHz bus speed, interrupt output, and 3 address pins in QFN-28 surface-mount for GPIO expansion.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n
\u5305\u88c5<\/td>\nQFN-28 (6x6mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MCP23017T-E\/ML from Microchip is a 16-bit I2C I\/O expander with 1.7MHz bus speed, interrupt output, and 3 address pins in QFN-28 surface-mount for GPIO expansion. Key Specifications Package QFN-28 (6x6mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","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],"tags":[],"chip_brand":[134],"class_list":["post-5860","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-microchip"],"acf":{"brief_explanation":"16-bit I2C I\/O expander, 1.7MHz, QFN-28","date_code":"","package_case":"QFN-28 (6x6mm)","in_stock":3139,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/MCP23017","price":"$1.50 @ 1ku","product_introduction":"The MCP23017T-E\/ML from Microchip is a 16-bit I2C I\/O expander with 1.7MHz bus speed, interrupt output, and 3 address pins in QFN-28 surface-mount for GPIO expansion.","working_principle":"The MCP23017T-E\/ML is a 16-bit I2C I\/O expander from Microchip in QFN-28 (4x4mm), providing 16 bidirectional GPIO pins via an I2C interface at up to 1.7MHz (high-speed mode). The 16 I\/O pins are split into two 8-bit ports (Port A and Port B), each with its own configuration, input, output, and polarity registers. The IODIRA and IODIRB registers set each pin as input (1) or output (0). The OLATA\/OLATB registers set output latch values. The GPIOA\/GPIOB registers read current pin states. The IPOLA\/IPOLB registers can invert the polarity of input pins. Each pin has an internal weak pull-up resistor (100kOhm) configurable via GPPUA\/GPPUB. The interrupt-on-change feature: the INTCONA\/INTCONB registers configure whether interrupts are generated on any change or only when a pin differs from a reference value (DEFVALA\/DEFVALB). The INTA and INTB output pins can be configured as active-high, active-low, or open-drain, and can mirror each other or operate independently. The three address pins (A0-A2) allow up to 8 MCP23017 devices on one I2C bus, providing 128 I\/O channels. The QFN-28 package is 70% smaller than the DIP-28, critical for space-constrained designs.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-8<\/td>GPB0-GPB7<\/td>I\/O<\/td>Port B GPIO (bits 0-7)<\/td><\/tr>
      9<\/td>VSS<\/td>Power<\/td>Ground<\/td><\/tr>
      10<\/td>SCK<\/td>Input<\/td>SPI clock (active in SPI mode)<\/td><\/tr>
      11<\/td>CS<\/td>Input<\/td>SPI chip select (active low)<\/td><\/tr>
      12<\/td>SDI<\/td>Input<\/td>SPI data in (MOSI)<\/td><\/tr>
      13<\/td>SDO<\/td>Output<\/td>SPI data out (MISO)<\/td><\/tr>
      14-15<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      16-23<\/td>GPA0-GPA7<\/td>I\/O<\/td>Port A GPIO (bits 0-7)<\/td><\/tr>
      24-28<\/td>INTB\/INTA\/A0-A2\/VDD<\/td>Output\/Input\/Power<\/td>Interrupt outputs, address select, supply (1.8-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      Microchip<\/td>MCP23017-E\/SP<\/td>DIP-28<\/td>Same device, DIP package for prototyping<\/td><\/tr>
      NXP<\/td>PCA8575DB<\/td>SSOP-24<\/td>16-bit I2C I\/O expander alternative<\/td><\/tr>
      Texas Instruments<\/td>TCA9555DBQR<\/td>SSOP-24<\/td>16-bit I2C expander, 400kHz<\/td><\/tr>
      Microchip<\/td>MCP23S17T-E\/ML<\/td>QFN-28<\/td>SPI version of same device<\/td><\/tr>
      Silicon Labs<\/td>CP2112-A01-GMR<\/td>QFN-24<\/td>USB to I2C bridge + GPIO<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5860","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=5860"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5860\/revisions"}],"predecessor-version":[{"id":6012,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5860\/revisions\/6012"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5860"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}