{"id":5629,"date":"2026-06-11T02:54:21","date_gmt":"2026-06-11T02:54:21","guid":{"rendered":"https:\/\/materialparts.com\/pca9535cpw\/"},"modified":"2026-06-12T09:12:23","modified_gmt":"2026-06-12T09:12:23","slug":"pca9535cpw","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/pca9535cpw\/","title":{"rendered":"PCA9535CPW"},"content":{"rendered":"

Productos<\/h2>\n

The PCA9535CPW from NXP is a 16-bit I2C-bus I\/O expander with interrupt output in TSSOP-24 for adding GPIO ports to microcontrollers.<\/p>\n

Especificaciones<\/h2>\n\n\n
Paquete<\/td>\nTSSOP-24<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

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

      Product Overview The PCA9535CPW from NXP is a 16-bit I2C-bus I\/O expander with interrupt output in TSSOP-24 for adding GPIO ports to microcontrollers. Key Specifications Package TSSOP-24 Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Automotive electronics<\/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":[168],"class_list":["post-5629","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-nxp"],"acf":{"brief_explanation":"16-bit I2C I\/O expander, TSSOP-24","date_code":"","package_case":"TSSOP-24","in_stock":11980,"datasheet":"https:\/\/www.nxp.com\/docs\/en\/data-sheet\/PCA9535_PCA9535C.pdf","price":"$1.10 @ 1ku","product_introduction":"The PCA9535CPW from NXP is a 16-bit I2C-bus I\/O expander with interrupt output in TSSOP-24 for adding GPIO ports to microcontrollers.","working_principle":"The PCA9535CPW is a 16-bit I2C I\/O expander from NXP in TSSOP-24, providing 16 general-purpose I\/O pins controlled via I2C (400kHz Fast-mode). The device has 8 internal registers: Input Port (read pin state), Output Port (set pin output level), Polarity Inversion (invert input polarity), Configuration (set direction: 0=output, 1=input). Each register is 8 bits, with separate registers for Port 0 and Port 1. The I2C base address is 0x20 (7-bit), with A0-A2 pins selecting one of 8 addresses (0x20-0x27), allowing 8 devices (128 I\/O pins) on a single I2C bus. The I\/O pins can sink 25mA (LED driving) and source 10mA. The interrupt output (INT#) asserts LOW when any input pin changes state from its previous read value, enabling interrupt-driven input scanning instead of polling. The interrupt is cleared by reading the Input Port register. The PCA9535 differs from the PCA9555 in that it has weaker pull-up resistors (100k vs 50k on PCA9555) and no internal pull-ups on I\/O pins configured as inputs. The -CPW suffix specifies TSSOP-24, commercial temperature (0C to +70C). The PCA9535 is one of the most popular I2C I\/O expanders, used in: LED matrix control, button\/keyboard scanning, and adding extra GPIO to microcontrollers.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-8<\/td>I\/O0.0-I\/O0.7<\/td>I\/O<\/td>Port 0 (8-bit, push-pull or open-drain, 25mA sink, 10mA source)<\/td><\/tr>
      9<\/td>A0<\/td>Input<\/td>Address bit 0 (connect to VDD or GND for I2C address selection)<\/td><\/tr>
      10<\/td>A1<\/td>Input<\/td>Address bit 1<\/td><\/tr>
      11<\/td>A2<\/td>Input<\/td>Address bit 2 (3 bits = 8 devices on same I2C bus)<\/td><\/tr>
      12-19<\/td>I\/O1.0-I\/O1.7<\/td>I\/O<\/td>Port 1 (8-bit, same capabilities as Port 0)<\/td><\/tr>
      20<\/td>INT#<\/td>Output<\/td>Interrupt output (active LOW, asserts on input change, open-drain)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Automotive electronics<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      NXP<\/td>PCA9535CPW<\/td>TSSOP-24<\/td>Same device, NXP brand<\/td><\/tr>
      NXP<\/td>PCAL9535APW<\/td>TSSOP-24<\/td>Enhanced version with latch, programmable output drive<\/td><\/tr>
      Texas Instruments<\/td>TCA9535PWR<\/td>TSSOP-24<\/td>Pin-compatible, TI brand<\/td><\/tr>
      Microchip<\/td>MCP23017-E\/SP<\/td>SPDIP-28<\/td>16-bit I2C I\/O expander, Microchip brand<\/td><\/tr>
      NXP<\/td>PCA9555PW<\/td>TSSOP-24<\/td>16-bit I2C I\/O with interrupt, NXP brand<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=5629"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5629\/revisions"}],"predecessor-version":[{"id":6212,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5629\/revisions\/6212"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=5629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=5629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=5629"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=5629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}