{"id":7635,"date":"2026-06-26T07:03:22","date_gmt":"2026-06-26T07:03:22","guid":{"rendered":"https:\/\/materialparts.com\/cat24c256wi-gt3-2\/"},"modified":"2026-06-26T14:03:28","modified_gmt":"2026-06-26T14:03:28","slug":"cat24c256wi-gt3-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/cat24c256wi-gt3-2\/","title":{"rendered":"CAT24C256WI-GT3"},"content":{"rendered":"

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

The CAT24C256WI-GT3 from onsemi is a 256Kbit I2C Serial EEPROM with 1MHz clock, 128-byte page write, and 1M cycle endurance in SOIC-8.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Density<\/td>\n256 Kbit (32K x 8)<\/td>\n<\/tr>\n
Interface<\/td>\nI2C (2-wire)<\/td>\n<\/tr>\n
Max Clock<\/td>\n1 MHz<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.7V to 5.5V<\/td>\n<\/tr>\n
Write Endurance<\/td>\n1,000,000 cycles<\/td>\n<\/tr>\n
Data Retention<\/td>\n> 200 years<\/td>\n<\/tr>\n
Page Size<\/td>\n128 bytes<\/td>\n<\/tr>\n
Write Cycle Time<\/td>\n5 ms max<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +125 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 256Kbit with 128-byte page write<\/li>\n
  • 1MHz I2C fast-mode plus<\/li>\n
  • 1 million cycle endurance<\/li>\n
  • 200+ year data retention<\/li>\n
  • Hardware write protect pin<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial calibration data storage<\/li>\n
    • Automotive configuration EEPROM<\/li>\n
    • Medical device settings<\/li>\n
    • Network equipment MAC address<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CAT24C256WI-GT3 from onsemi is a 256Kbit I2C Serial EEPROM with 1MHz clock, 128-byte page write, and 1M cycle endurance in SOIC-8. Key Specifications Density 256 Kbit (32K x 8) Interface I2C (2-wire) Max Clock 1 MHz Supply Voltage 1.7V to 5.5V Write Endurance 1,000,000 cycles Data Retention > 200 years Page Size […]<\/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],"tags":[],"chip_brand":[144],"class_list":["post-7635","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"256Kbit I2C EEPROM, 1MHz, 1M cycle, SOIC-8","date_code":"","package_case":"SOIC-8 (4.90 x 3.90 x 1.25 mm)","in_stock":18000,"datasheet":"https:\/\/www.onsemi.com\/pdf\/datasheet\/cat24c256-d.pdf","price":"$0.54 @ 1ku","product_introduction":"The CAT24C256WI-GT3 from onsemi is a 256Kbit (32K x 8) I2C serial EEPROM in SOIC-8. It supports 1MHz I2C fast-mode plus, 128-byte page write, and exceptional 1 million cycle endurance with greater than 200-year data retention. The device uses a standard 2-wire I2C interface with up to 4 devices sharing the same bus via A0, A1 address pins. The hardware write protect (WP) pin prevents accidental data modification. The GT3 suffix denotes SOIC-8 with automotive temperature range (-40 to +125C).","working_principle":"The CAT24C256WI-GT3 operates as an I2C serial EEPROM. (1) Communication uses standard I2C protocol with SDA and SCL lines. Each transaction begins with a START condition, followed by a device address byte (1010 + A1A0 + R\/W), and then the 15-bit memory address for random access. Up to 4 devices can share the same I2C bus. (2) Read operations support current-address read (sequential), random read (with address set), and sequential read (continuous stream). The 1MHz clock rate supports fast data transfer. (3) Write operations support byte-write and 128-byte page-write modes. During page-write, up to 128 bytes can be written in a single operation with the internal address counter incrementing automatically within the page boundary. The write cycle time is 5ms maximum. The WP pin, when tied to VCC, protects the upper quadrant of memory from writes.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>A0<\/td>Device address bit 0<\/td><\/tr>
      2<\/td>A1<\/td>Device address bit 1<\/td><\/tr>
      3<\/td>VSS<\/td>Ground<\/td><\/tr>
      4<\/td>SDA<\/td>Serial data (I2C)<\/td><\/tr>
      5<\/td>SCL<\/td>Serial clock (I2C)<\/td><\/tr>
      6<\/td>WP<\/td>Write protect (active high)<\/td><\/tr>
      7<\/td>NC<\/td>No connect<\/td><\/tr>
      8<\/td>VCC<\/td>Power supply (1.7-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial calibration data with 1M cycle endurance<\/li>
      • Automotive configuration EEPROM with 200-year retention<\/li>
      • Medical device settings storage with hardware WP<\/li>
      • Network equipment MAC address with 1MHz I2C<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        CAT24C128WI-GT3<\/td>onsemi<\/td>128Kbit, same family<\/td><\/tr>
        CAT24C512WI-GT3<\/td>onsemi<\/td>512Kbit, same family<\/td><\/tr>
        AT24C256C-SSHL-T<\/td>Microchip<\/td>256Kbit, I2C, SOIC-8<\/td><\/tr>
        24LC256-I\/SN<\/td>Microchip<\/td>256Kbit, 400kHz, SOIC-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7635","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=7635"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7635\/revisions"}],"predecessor-version":[{"id":7670,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7635\/revisions\/7670"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7635"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}