{"id":10366,"date":"2026-07-19T12:47:21","date_gmt":"2026-07-19T12:47:21","guid":{"rendered":"https:\/\/ic-vendor.com\/25lc256-e-sn\/"},"modified":"2026-07-19T12:47:21","modified_gmt":"2026-07-19T12:47:21","slug":"25lc256-e-sn","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/25lc256-e-sn\/","title":{"rendered":"25LC256-E\/SN"},"content":{"rendered":"

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

The 25LC256-E\/SN is a 256Kbit SPI Serial EEPROM from Microchip, organized as 32K x 8 bits. It supports SPI modes 0 and 3 with up to 10MHz clock frequency. The ‘E’ temperature suffix denotes extended range (-40\u00b0C to +125\u00b0C) in an 8-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Memory Density<\/td>\n256Kbit (32KB)<\/td>\n<\/tr>\n
Organization<\/td>\n32K x 8<\/td>\n<\/tr>\n
Interface<\/td>\nSPI (modes 0 and 3)<\/td>\n<\/tr>\n
Max Clock Frequency<\/td>\n10MHz<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.5V to 5.5V<\/td>\n<\/tr>\n
Page Size<\/td>\n64 bytes<\/td>\n<\/tr>\n
Write Cycle Time<\/td>\n5ms max<\/td>\n<\/tr>\n
Write Protection<\/td>\nQuarter, Half, Whole Array<\/td>\n<\/tr>\n
Endurance<\/td>\n1,000,000 cycles<\/td>\n<\/tr>\n
Data Retention<\/td>\n>200 years<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n8-SOIC (3.9mm width)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 10MHz SPI clock \u2014 fast read throughput<\/li>\n
  • SPI modes 0 and 3 support<\/li>\n
  • 64-byte page write buffer<\/li>\n
  • Block write protection (1\/4, 1\/2, or entire array)<\/li>\n
  • Hardware write-protect pin (WP)<\/li>\n
  • Self-timed erase\/write cycle<\/li>\n
  • AEC-Q100 qualified (automotive grade)<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Automotive ECU configuration storage<\/li>\n
    • Industrial control parameter storage<\/li>\n
    • Medical device calibration data<\/li>\n
    • Consumer electronics settings<\/li>\n
    • Motor drive configuration memory<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 25LC256-E\/SN is a 256Kbit SPI Serial EEPROM from Microchip, organized as 32K x 8 bits. It supports SPI modes 0 and 3 with up to 10MHz clock frequency. The ‘E’ temperature suffix denotes extended range (-40\u00b0C to +125\u00b0C) in an 8-pin SOIC package. Key Specifications Memory Density 256Kbit (32KB) Organization 32K x […]<\/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":[40,4],"tags":[1660,1651,1661],"chip_brand":[134],"class_list":["post-10366","post","type-post","status-publish","format-standard","hentry","category-electrically-erasable-programmable-read-only-memory-eeprom","category-memory-chips","tag-25lc256-e-sn","tag-eeprom","tag-spi","chip_brand-microchip"],"acf":{"brief_explanation":"256Kbit SPI EEPROM, 10MHz, 2.5-5.5V, 64B page, 8-SOIC, -40~125\u00b0C Ext","date_code":"","package_case":"8-SOIC (0.154\", 3.90mm width)","in_stock":6800,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/25lc256","price":"","product_introduction":"The 25LC256-E\/SN is a 256Kbit SPI Serial EEPROM from Microchip, organized as 32K x 8 bits with support for SPI modes 0 and 3 at up to 10MHz clock frequency. The extended temperature range (-40\u00b0C to +125\u00b0C) makes it suitable for automotive and harsh-environment applications. Block write protection allows protecting 1\/4, 1\/2, or the entire memory array, while the hardware WP pin prevents inadvertent writes. The 64-byte page buffer and self-timed write cycle simplify firmware design.","working_principle":"The 25LC256 communicates via a 4-wire SPI bus (CS, SCK, SI, SO). To write data, the host first sends a Write Enable (WREN) instruction, then a Page Program instruction with a 16-bit address and up to 64 bytes of data. The device internally programs the page within 5ms. For read operations, the host sends a Read instruction with the starting address, then clocks out data bytes sequentially. Write protection is controlled by the Status Register: the BP1 and BP0 bits select 1\/4, 1\/2, or full array protection, while the WP pin provides hardware protection of the Status Register itself.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>CS<\/td>Chip Select (active low)<\/td><\/tr>
      2<\/td>SO<\/td>Serial Data Output<\/td><\/tr>
      3<\/td>WP<\/td>Write Protect (active low)<\/td><\/tr>
      4<\/td>VSS<\/td>Ground<\/td><\/tr>
      5<\/td>SI<\/td>Serial Data Input<\/td><\/tr>
      6<\/td>SCK<\/td>Serial Clock<\/td><\/tr>
      7<\/td>HOLD<\/td>Suspend\/Resume (active low)<\/td><\/tr>
      8<\/td>VCC<\/td>Power Supply<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive ECU configuration and calibration data storage<\/li>
      • Industrial controller parameter and tuning storage<\/li>
      • Medical device patient settings and calibration<\/li>
      • Motor drive and VFD configuration memory<\/li>
      • Consumer electronics user preference storage<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Density<\/th>Notes<\/th><\/tr>
        Microchip<\/td>AT25256B-SSHL-T<\/td>256Kbit<\/td>20MHz SPI, wider voltage (1.8V)<\/td><\/tr>
        STMicro<\/td>M95256-WMN6P<\/td>256Kbit<\/td>SPI EEPROM, SO8<\/td><\/tr>
        ON Semi<\/td>CAT25256VI<\/td>256Kbit<\/td>SPI EEPROM equivalent<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10366"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10366\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10366"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}