{"id":3359,"date":"2026-06-03T05:54:15","date_gmt":"2026-06-03T05:54:15","guid":{"rendered":"https:\/\/materialparts.com\/mcp23s17t-e-ml\/"},"modified":"2026-06-03T05:54:15","modified_gmt":"2026-06-03T05:54:15","slug":"mcp23s17t-e-ml","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mcp23s17t-e-ml\/","title":{"rendered":"MCP23S17T-E\/ML"},"content":{"rendered":"

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

The MCP23S17T-E\/ML from Microchip Technology is a 16-bit I\/O expander with SPI interface in a 28-pin QFN (6x6mm) package. It provides 16 bidirectional I\/O pins with interrupt output, programmable via SPI at up to 10MHz. Three hardware address pins allow up to 8 devices on the same SPI bus.<\/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\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nSPI (Mode 0 and Mode 3)<\/td>\n<\/tr>\n
Number of I\/Os<\/td>\n16 (two 8-bit ports: PORTA and PORTB)<\/td>\n<\/tr>\n
Max SPI Clock<\/td>\n10 MHz<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n1.8V to 5.5V<\/td>\n<\/tr>\n
Output Current per Pin<\/td>\n25 mA sink\/source<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n1 uA max (standby)<\/td>\n<\/tr>\n
Operating Current<\/td>\n1 mA max @ SCK=1MHz<\/td>\n<\/tr>\n
Interrupt Output<\/td>\nINTA and INTB (configurable)<\/td>\n<\/tr>\n
Address Pins<\/td>\n3 (A0, A1, A2 for up to 8 devices)<\/td>\n<\/tr>\n
ESD Protection<\/td>\n4 kV HBM<\/td>\n<\/tr>\n
\u062a\u0628\u062f\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629<\/td>\n700 mW<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nQFN-28 (6x6mm, exposed pad)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 16-bit remote bidirectional I\/O expansion<\/li>\n
  • High-speed SPI interface up to 10MHz<\/li>\n
  • 3 hardware address pins for cascading up to 8 devices<\/li>\n
  • Two 16-bit configuration registers for I\/O direction<\/li>\n
  • Individual input polarity inversion<\/li>\n
  • Interrupt-on-change from register defaults<\/li>\n
  • Configurable interrupt output (active-high, active-low, open-drain)<\/li>\n
  • INTA and INTB can be configured independently or mirrored<\/li>\n
  • Power-on Reset (POR) circuit<\/li>\n
  • Low standby current: 1uA max<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Microcontroller I\/O expansion via SPI<\/li>\n
    • Keypad and matrix scanning<\/li>\n
    • LCD interface expansion<\/li>\n
    • LED control and status monitoring<\/li>\n
    • Embedded system GPIO expansion<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MCP23S17T-E\/ML from Microchip Technology is a 16-bit I\/O expander with SPI interface in a 28-pin QFN (6x6mm) package. It provides 16 bidirectional I\/O pins with interrupt output, programmable via SPI at up to 10MHz. Three hardware address pins allow up to 8 devices on the same SPI bus. Key Specifications Interface SPI […]<\/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":[134],"class_list":["post-3359","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-microchip"],"acf":{"brief_explanation":"16-bit SPI I\/O expander, 10MHz, 25mA\/pin, QFN-28, cascading up to 8 devices","date_code":"","package_case":"QFN-28 \/ VQFN-28 (6.0 x 6.0 x 0.9 mm, 0.65mm pitch, exposed pad)","in_stock":1211,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/20001952C.pdf","price":"$1.54 @ 1ku","product_introduction":"The MCP23S17T-E\/ML from Microchip is a 16-bit SPI I\/O expander in QFN-28 (6x6mm) package. Provides 16 bidirectional I\/O pins with 25mA sink\/source per pin and up to 10MHz SPI clock. Three address pins allow 8 devices on one bus. Features include interrupt-on-change, polarity inversion, POR, and 1uA standby current. The T suffix denotes tape-and-reel packaging, E denotes extended temperature range (-40 to 125C), and ML denotes QFN package.","working_principle":"The MCP23S17 is accessed via SPI (Mode 0 or Mode 3) using a standard SPI read\/write protocol with an 8-bit opcode (device opcode + R\/W bit) followed by a register address byte and data bytes. The 16 I\/O pins are organized as two 8-bit ports (PORTA\/GPA and PORTB\/GPB), each with dedicated configuration registers for I\/O direction (IODIRA\/B), input polarity (IPOLA\/B), interrupt-on-change control (GPINTENA\/B), default comparison value (DEFVALA\/B), and pull-up resistors (GPPUA\/B). The interrupt output pins (INTA, INTB) can be configured to trigger on any pin change from a programmed default state, or on any change from the previous state (interrupt-on-change). The IOCON register configures global features like banking mode, interrupt mirroring, and open-drain interrupt output.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GPB0<\/td>I\/O<\/td>Port B bit 0<\/td><\/tr>
      2<\/td>GPB1<\/td>I\/O<\/td>Port B bit 1<\/td><\/tr>
      3<\/td>GPB2<\/td>I\/O<\/td>Port B bit 2<\/td><\/tr>
      4<\/td>GPB3<\/td>I\/O<\/td>Port B bit 3<\/td><\/tr>
      5<\/td>GPB4<\/td>I\/O<\/td>Port B bit 4<\/td><\/tr>
      6<\/td>GPB5<\/td>I\/O<\/td>Port B bit 5<\/td><\/tr>
      7<\/td>GPB6<\/td>I\/O<\/td>Port B bit 6<\/td><\/tr>
      8<\/td>GPB7<\/td>I\/O<\/td>Port B bit 7<\/td><\/tr>
      9<\/td>VDD<\/td>Power<\/td>Positive supply (1.8-5.5V)<\/td><\/tr>
      10<\/td>VSS<\/td>Ground<\/td>Ground<\/td><\/tr>
      11<\/td>CS#<\/td>Input<\/td>SPI chip select (active low)<\/td><\/tr>
      12<\/td>SCK<\/td>Input<\/td>SPI clock<\/td><\/tr>
      13<\/td>SI<\/td>Input<\/td>SPI data in<\/td><\/tr>
      14<\/td>SO<\/td>Output<\/td>SPI data out<\/td><\/tr>
      15<\/td>A0<\/td>Input<\/td>Hardware address bit 0<\/td><\/tr>
      16<\/td>A1<\/td>Input<\/td>Hardware address bit 1<\/td><\/tr>
      17<\/td>A2<\/td>Input<\/td>Hardware address bit 2<\/td><\/tr>
      18<\/td>RESET#<\/td>Input<\/td>Reset (active low)<\/td><\/tr>
      19<\/td>INTB<\/td>Output<\/td>Interrupt output for Port B<\/td><\/tr>
      20<\/td>INTA<\/td>Output<\/td>Interrupt output for Port A<\/td><\/tr>
      21-28<\/td>GPA0-GPA7<\/td>I\/O<\/td>Port A bits 0-7<\/td><\/tr><\/table>","application_scenarios":"
      • MCU GPIO expansion via SPI bus for keypad\/matrix scanning<\/li>
      • LCD module interface with limited MCU I\/O pins<\/li>
      • Industrial control panel with many switches and LEDs<\/li>
      • Embedded system expansion board with 8 cascaded devices (128 I\/O)<\/li>
      • Robotics sensor\/actuator interface<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>MCP23017T-E\/ML<\/td>QFN-28<\/td>I2C version of the same device<\/td><\/tr>
        Microchip<\/td>MCP23S17T-E\/SS<\/td>SSOP-28<\/td>SSOP package version<\/td><\/tr>
        NXP<\/td>PCAL6524<\/td>QFN-28<\/td>24-bit I2C I\/O expander<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3359","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=3359"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3359\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3359"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3359"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}