{"id":3569,"date":"2026-06-06T10:40:51","date_gmt":"2026-06-06T10:40:51","guid":{"rendered":"https:\/\/materialparts.com\/cat24c256wi-gt3\/"},"modified":"2026-06-06T10:40:51","modified_gmt":"2026-06-06T10:40:51","slug":"cat24c256wi-gt3","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/cat24c256wi-gt3\/","title":{"rendered":"CAT24C256WI-GT3"},"content":{"rendered":"

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

The CAT24C256WI-GT3 from onsemi is a 256-Kb (32K x 8) I2C CMOS serial EEPROM with 64-byte page write buffer. Supporting Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) I2C modes, it features on-chip ECC for high reliability, hardware write protection, and Schmitt trigger inputs for noise immunity. The WI-GT3 denotes the SOIC-8 package in tape-and-reel.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\nSerial I2C EEPROM<\/td>\n<\/tr>\n
Memory Size<\/td>\n256 Kb (32K x 8)<\/td>\n<\/tr>\n
Organization<\/td>\n512 pages x 64 bytes<\/td>\n<\/tr>\n
Interface<\/td>\nI2C (Standard\/Fast\/Fast-Plus)<\/td>\n<\/tr>\n
Clock Frequency<\/td>\nUp to 1 MHz (Fast-Plus)<\/td>\n<\/tr>\n
Page Write Buffer<\/td>\n64 bytes<\/td>\n<\/tr>\n
Write Cycle Time<\/td>\n5 ms (max)<\/td>\n<\/tr>\n
Endurance<\/td>\n1,000,000 program\/erase cycles<\/td>\n<\/tr>\n
Data Retention<\/td>\n100 years<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8V – 5.5V<\/td>\n<\/tr>\n
Write Protection<\/td>\nHardware (WP pin, entire memory)<\/td>\n<\/tr>\n
On-Chip ECC<\/td>\nYes (Error Correction Code)<\/td>\n<\/tr>\n
Address Pins<\/td>\n3 (A0-A2, up to 8 devices on bus)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 256 Kb (32K x 8) with 64-byte page write buffer<\/li>\n
  • Supports Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) I2C<\/li>\n
  • On-chip ECC for high-reliability data storage<\/li>\n
  • 1,000,000 program\/erase cycle endurance<\/li>\n
  • 100-year data retention<\/li>\n
  • Hardware write protection via WP pin (entire memory)<\/li>\n
  • Schmitt triggers and noise suppression on SCL\/SDA inputs<\/li>\n
  • Up to 8 devices on the same I2C bus via A0-A2 address pins<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial control parameter storage<\/li>\n
    • Consumer device configuration memory<\/li>\n
    • Automotive system calibration data<\/li>\n
    • Communication equipment settings<\/li>\n
    • Computer peripheral identification and setup data<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CAT24C256WI-GT3 from onsemi is a 256-Kb (32K x 8) I2C CMOS serial EEPROM with 64-byte page write buffer. Supporting Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) I2C modes, it features on-chip ECC for high reliability, hardware write protection, and Schmitt trigger inputs for noise immunity. The WI-GT3 denotes the […]<\/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":[26,13],"tags":[],"chip_brand":[182],"class_list":["post-3569","post","type-post","status-publish","format-standard","hentry","category-digital-signal-processors-dsp","category-integrated-circuits-ics","chip_brand-onsemi"],"acf":{"brief_explanation":"256Kb I2C EEPROM, 32Kx8, 1MHz, 64-byte page, ECC, SOIC-8, 1M cycles","date_code":"","package_case":"SOIC-8 (4.90 x 3.90 x 1.27 mm)","in_stock":5006,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/CAT24C256-D.PDF","price":"$0.37 @ 1ku","product_introduction":"The CAT24C256WI-GT3 from onsemi is a 256-Kb serial I2C EEPROM organized as 32,768 x 8 bits with a 64-byte page write buffer. It supports the full range of I2C modes from Standard (100 kHz) to Fast-Plus (1 MHz) for flexible system integration. On-chip ECC (Error Correction Code) provides single-bit error correction for enhanced data reliability, making it suitable for applications where data integrity is critical. The device features 1,000,000 program\/erase cycle endurance and 100-year data retention. Three address pins (A0-A2) allow up to eight CAT24C256 devices on the same I2C bus, providing up to 2 Mb of EEPROM storage.","working_principle":"The CAT24C256WI-GT3 communicates via the I2C protocol with device address 0xA0\/0xA1 (write\/read). The 15-bit address space (32K bytes) is accessed through two address bytes following the device address byte. The 64-byte page write buffer allows writing up to 64 bytes in a single operation; the write cycle completes in 5 ms maximum. Random and sequential read operations are supported for flexible data retrieval. The on-chip ECC engine generates and stores a Hamming code for each byte, enabling single-bit error detection and correction during read operations. The WP (Write Protect) pin, when driven high, prevents all write operations to the entire memory array. Schmitt trigger inputs on SCL and SDA provide noise immunity in electrically harsh environments.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>A0<\/td>Input<\/td>Address bit 0 (device select)<\/td><\/tr>
      2<\/td>A1<\/td>Input<\/td>Address bit 1 (device select)<\/td><\/tr>
      3<\/td>A2<\/td>Input<\/td>Address bit 2 (device select)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      5<\/td>SDA<\/td>I\/O<\/td>Serial data (open-drain, bidirectional)<\/td><\/tr>
      6<\/td>SCL<\/td>Input<\/td>Serial clock<\/td><\/tr>
      7<\/td>WP<\/td>Input<\/td>Write protect (HIGH = protect all)<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>Supply voltage (1.8-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial control: Calibration and configuration storage with ECC protection<\/li>
      • Consumer devices: Settings and user preference storage with 1 MHz fast access<\/li>
      • Automotive: Parameter storage with 1M cycle endurance and 100-year retention<\/li>
      • Communication: MAC address and serial number storage with noise-immune inputs<\/li>
      • Multi-device systems: 8 devices on one I2C bus for up to 256KB storage<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>AT24C256C-SSHL-T<\/td>SOIC-8<\/td>256Kb I2C, 1MHz, ESD protection<\/td><\/tr>
        ST<\/td>M24256-BRMN6TP<\/td>SOIC-8<\/td>256Kb I2C, automotive qualified<\/td><\/tr>
        Rohm<\/td>BR24G256FJ-3AGTE2<\/td>SOIC-8<\/td>256Kb I2C, 1.7-5.5V<\/td><\/tr>
        onsemi<\/td>CAT24C256YI-GT3<\/td>TSSOP-8<\/td>Same function, TSSOP package<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3569","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=3569"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3569\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3569"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}