{"id":10680,"date":"2026-07-20T09:43:10","date_gmt":"2026-07-20T09:43:10","guid":{"rendered":"https:\/\/ic-vendor.com\/tca9546apwr\/"},"modified":"2026-07-20T09:43:10","modified_gmt":"2026-07-20T09:43:10","slug":"tca9546apwr","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/tca9546apwr\/","title":{"rendered":"TCA9546APWR"},"content":{"rendered":"

Productos<\/h2>\n

The TCA9546APWR from Texas Instruments is a 4-channel I2C\/SMBus switch with reset and voltage-level translation in a TSSOP-16 (PW) package. Operating from 1.65V to 5.5V, it enables a single I2C master to communicate with up to 4 downstream I2C buses at different voltage levels, resolving address conflicts and supporting hot insertion with low RON switches.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Canales<\/td>\n4 (1-to-4 bidirectional)<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n1.65V – 5.5V<\/td>\n<\/tr>\n
I2C Frequency<\/td>\n0 – 400 kHz<\/td>\n<\/tr>\n
Address Pins<\/td>\n3 (A0-A1-A2), up to 8 devices on bus<\/td>\n<\/tr>\n
Restablecer<\/td>\nActive-low RESET input<\/td>\n<\/tr>\n
Level Translation<\/td>\n1.8V\/2.5V\/3.3V\/5V between channels<\/td>\n<\/tr>\n
I\/O Tolerance<\/td>\n5.5V<\/td>\n<\/tr>\n
ESD<\/td>\n4000V HBM, 1500V CDM<\/td>\n<\/tr>\n
Paquete<\/td>\nTSSOP-16 (PW) 5×6.4 mm<\/td>\n<\/tr>\n
Temperature<\/td>\n-40 a +85 grados C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • 1-of-4 bidirectional translating switches for I2C bus expansion<\/li>\n
  • Voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses<\/li>\n
  • Active-low RESET input recovers from stuck downstream buses<\/li>\n
  • Three address pins allow up to 8 TCA9546A devices on one I2C bus<\/li>\n
  • Hot insertion support with no glitch on power-up<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Server and router I2C bus expansion and isolation<\/li>\n
    • Multi-sensor I2C networks with address conflict resolution<\/li>\n
    • Mixed-voltage I2C bus bridging (1.8V to 5V)<\/li>\n
    • Broadcast communication across multiple I2C segments<\/li>\n
    • Industrial fault isolation on I2C buses<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TCA9546APWR from Texas Instruments is a 4-channel I2C\/SMBus switch with reset and voltage-level translation in a TSSOP-16 (PW) package. Operating from 1.65V to 5.5V, it enables a single I2C master to communicate with up to 4 downstream I2C buses at different voltage levels, resolving address conflicts and supporting hot insertion with low […]<\/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":[2021],"chip_brand":[138],"class_list":["post-10680","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-tca9546apwr","chip_brand-ti"],"acf":{"brief_explanation":"4-ch I2C switch with reset and level translation, 1.65-5.5V, 400kHz, TSSOP-16","date_code":"","package_case":"TSSOP-16 (PW) 5x6.4 mm","in_stock":14868,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tca9546a.pdf","price":"$0.463 @ 1ku","product_introduction":"The TCA9546A is a 4-channel I2C\/SMBus switch from Texas Instruments that enables a single I2C master to communicate with up to 4 downstream I2C buses. The upstream SCL\/SDA pair fans out to four downstream channel pairs, any of which can be selected individually or in combination via the programmable control register. The pass-gate construction allows different bus voltages on each channel, enabling voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses. The active-low RESET input recovers the device when a downstream bus is stuck low. With three address pins, up to 8 TCA9546A devices can coexist on the same I2C bus.","working_principle":"The TCA9546A operates as an I2C-controlled multiplexer for I2C buses. The master writes to the control register (via I2C) to select which downstream channels (0-3) are connected to the upstream bus. Each channel consists of a bidirectional analog switch connecting the upstream SCL\/SDA to the downstream SCn\/SDn. The pass gates are constructed so VCC limits the maximum high voltage passed, enabling level translation. External pull-up resistors on each downstream bus set the desired voltage level. When RESET is asserted low, the I2C state machine is reset and all channels are deselected. Power-on reset also deselects all channels, ensuring no bus conflicts during startup.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>SC0<\/td>I\/O<\/td>Channel 0 downstream SCL<\/td><\/tr>
      2<\/td>SD0<\/td>I\/O<\/td>Channel 0 downstream SDA<\/td><\/tr>
      3<\/td>SC1<\/td>I\/O<\/td>Channel 1 downstream SCL<\/td><\/tr>
      4<\/td>SD1<\/td>I\/O<\/td>Channel 1 downstream SDA<\/td><\/tr>
      5<\/td>SC2<\/td>I\/O<\/td>Channel 2 downstream SCL<\/td><\/tr>
      6<\/td>SD2<\/td>I\/O<\/td>Channel 2 downstream SDA<\/td><\/tr>
      7<\/td>SC3<\/td>I\/O<\/td>Channel 3 downstream SCL<\/td><\/tr>
      8<\/td>SD3<\/td>I\/O<\/td>Channel 3 downstream SDA<\/td><\/tr>
      9<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      10-12<\/td>A0-A2<\/td>Input<\/td>I2C address select<\/td><\/tr>
      13<\/td>RESET<\/td>Input<\/td>Active-low reset<\/td><\/tr>
      14<\/td>SCL<\/td>I\/O<\/td>Upstream I2C clock<\/td><\/tr>
      15<\/td>SDA<\/td>I\/O<\/td>Upstream I2C data<\/td><\/tr>
      16<\/td>VCC<\/td>Power<\/td>Supply (1.65-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Multi-sensor I2C: resolve address conflicts by isolating identical-address sensors<\/li>
      • Server I2C management: isolate FRU EEPROMs on different blades<\/li>
      • Mixed-voltage bridging: connect 1.8V I2C sensors to 3.3V MCU bus<\/li>
      • Broadcast mode: enable all channels simultaneously for I2C firmware update<\/li>
      • Industrial fault isolation: reset stuck bus without powering down the system<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>PCA9546APWR<\/td>TSSOP-16<\/td>Similar, 2.3-5.5V supply range<\/td><\/tr>
        TI<\/td>TCA9548APWR<\/td>TSSOP-24<\/td>8-channel version<\/td><\/tr>
        TI<\/td>TCA9546ARGER<\/td>VQFN-16<\/td>Smaller 4x4mm QFN package<\/td><\/tr>
        NXP<\/td>PCA9546APW<\/td>TSSOP-16<\/td>Pin-compatible alternative<\/td><\/tr>
        Renesas<\/td>ISL9546AIRZ<\/td>TSSOP-16<\/td>4-channel I2C MUX alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=10680"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10680\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=10680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=10680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=10680"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=10680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}