{"id":3641,"date":"2026-06-06T12:18:13","date_gmt":"2026-06-06T12:18:13","guid":{"rendered":"https:\/\/materialparts.com\/tca9539rger\/"},"modified":"2026-06-06T12:18:13","modified_gmt":"2026-06-06T12:18:13","slug":"tca9539rger","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tca9539rger\/","title":{"rendered":"TCA9539RGER"},"content":{"rendered":"

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

The TCA9539RGER from Texas Instruments is a 16-bit I2C\/SMBus I\/O expander with interrupt output and reset input. Providing 16 general-purpose I\/O pins that can be individually configured as inputs or outputs, this device expands the I\/O capabilities of microcontrollers and processors through a standard I2C serial interface. Packaged in a 24-pin VQFN (RGE) format measuring 4mm x 4mm, it features an active-low interrupt output that signals input state changes, a reset input for power-on initialization, and wide 1.65V to 5.5V voltage operation.<\/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
I\/O Channels<\/td>\n16-bit (2 x 8-bit ports)<\/td>\n<\/tr>\n
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nI2C \/ SMBus<\/td>\n<\/tr>\n
I2C Clock Frequency<\/td>\n400kHz (fast mode)<\/td>\n<\/tr>\n
Supply Voltage (VCC)<\/td>\n1.65V to 5.5V<\/td>\n<\/tr>\n
I\/O Voltage<\/td>\n1.65V to 5.5V (independent of VCC)<\/td>\n<\/tr>\n
Output Sink Current<\/td>\n25mA per I\/O, 100mA total<\/td>\n<\/tr>\n
Interrupt Output<\/td>\nActive-low (INT)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 16 general-purpose I\/O pins (P00-P07, P10-P17)<\/li>\n
  • Individual I\/O direction and polarity inversion configuration<\/li>\n
  • Active-low interrupt output on input change<\/li>\n
  • Active-low reset input for power-on initialization<\/li>\n
  • Hardware address pins for up to 4 devices on one I2C bus<\/li>\n
  • 5V tolerant I\/O pins<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • GPIO expansion for microcontrollers<\/li>\n
    • LED and button matrix control<\/li>\n
    • Industrial automation I\/O modules<\/li>\n
    • Server and networking equipment management<\/li>\n
    • Consumer electronics interface expansion<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TCA9539RGER from Texas Instruments is a 16-bit I2C\/SMBus I\/O expander with interrupt output and reset input. Providing 16 general-purpose I\/O pins that can be individually configured as inputs or outputs, this device expands the I\/O capabilities of microcontrollers and processors through a standard I2C serial interface. Packaged in a 24-pin VQFN (RGE) […]<\/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":[138],"class_list":["post-3641","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"16-bit I2C I\/O Expander with Interrupt, Reset, 1.65V-5.5V, 24-pin VQFN","date_code":"","package_case":"24-pin VQFN (RGE), 4mm x 4mm","in_stock":7516,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tca9539.pdf","price":"$1.05 @ 1ku","product_introduction":"The TCA9539RGER from Texas Instruments is a 16-bit I2C and SMBus-compatible I\/O expander that provides 16 general-purpose I\/O pins organized as two 8-bit ports (Port 0 and Port 1). Each I\/O can be individually configured as input or output through the Configuration registers, and the Polarity Inversion register allows input polarity to be flipped. An active-low interrupt output (INT) is generated when any input changes state from its registered default, enabling efficient polling-free host interaction. The device supports I2C fast mode up to 400kHz and operates from 1.65V to 5.5V, with I\/O voltage levels independent of the supply. The RGER package is a 24-pin VQFN measuring 4mm x 4mm.","working_principle":"The TCA9539 communicates with the host controller via a standard 2-wire I2C interface. The host writes to and reads from internal registers to configure and control the I\/O pins. The Configuration register (0x06\/0x07) sets each pin as input (1) or output (0). The Output Port register (0x02\/0x03) sets the output logic level, while the Input Port register (0x00\/0x01) reads the actual pin state. The Polarity Inversion register (0x04\/0x05) can invert the logic of input pins. When any input pin changes state, the INT output is driven low, signaling the host to read the input register. The RESET input allows all registers to be initialized to their default states without cycling power.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1-8<\/td>P00-P07<\/td>Port 0 I\/O pins<\/td><\/tr>
      9<\/td>GND<\/td>Ground<\/td><\/tr>
      10<\/td>VCC<\/td>Power supply (1.65V-5.5V)<\/td><\/tr>
      11<\/td>SDA<\/td>I2C serial data<\/td><\/tr>
      12<\/td>SCL<\/td>I2C serial clock<\/td><\/tr>
      13<\/td>INT<\/td>Interrupt output (active low)<\/td><\/tr>
      14<\/td>RESET<\/td>Reset input (active low)<\/td><\/tr>
      15-16<\/td>A0-A1<\/td>I2C address select<\/td><\/tr>
      17-24<\/td>P10-P17<\/td>Port 1 I\/O pins<\/td><\/tr><\/table>","application_scenarios":"
      • GPIO expansion for pin-limited microcontrollers and processors<\/li>
      • LED matrix control and button\/switch scanning panels<\/li>
      • Industrial PLC I\/O module expansion via I2C bus<\/li>
      • Server management board fan and sensor monitoring<\/li>
      • Consumer electronics front panel button and indicator control<\/li><\/ul>","alternative_models":"
        Model<\/th>Notes<\/th><\/tr>
        TCA9539PWR<\/td>24-pin TSSOP package version<\/td><\/tr>
        PCAL9539A<\/td>NXP equivalent with additional latch features<\/td><\/tr>
        MCP23017<\/td>Microchip 16-bit I\/O expander, I2C, 28-pin<\/td><\/tr>
        SX1509<\/td>Diasemi 16-bit I\/O expander with PWM\/LED driver<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3641","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=3641"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3641\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3641"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3641"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3641"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3641"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}