{"id":5438,"date":"2026-06-10T02:07:47","date_gmt":"2026-06-10T02:07:47","guid":{"rendered":"https:\/\/materialparts.com\/24aa02e48t-i-ot\/"},"modified":"2026-06-10T02:07:47","modified_gmt":"2026-06-10T02:07:47","slug":"24aa02e48t-i-ot","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/24aa02e48t-i-ot\/","title":{"rendered":"24AA02E48T-I\/OT"},"content":{"rendered":"

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

The 24AA02E48T-I\/OT from Microchip Technology is a 2Kb I2C serial EEPROM pre-programmed with a globally unique EUI-48 MAC address in a 5-pin SOT-23 package. Operating from 1.7V to 5.5V with 1MHz clock rate at 2.5V+, it eliminates the need for MAC address programming during production.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Density<\/td>\n2 Kbit (256 x 8)<\/td>\n<\/tr>\n
Interface<\/td>\nI2C (2-wire)<\/td>\n<\/tr>\n
Max Clock Rate<\/td>\n400 kHz @ 1.7V, 1 MHz @ 2.5V+<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.7V to 5.5V<\/td>\n<\/tr>\n
Unique Address<\/td>\nEUI-48 (48-bit) factory-programmed<\/td>\n<\/tr>\n
Page Size<\/td>\n8 bytes<\/td>\n<\/tr>\n
Write Cycle Time<\/td>\n3 ms typical (5 ms max)<\/td>\n<\/tr>\n
Endurance<\/td>\n1,000,000 write cycles<\/td>\n<\/tr>\n
Data Retention<\/td>\n>200 years<\/td>\n<\/tr>\n
Write Protect<\/td>\nHalf array<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-5<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 2Kb EEPROM with EUI-48 MAC address<\/li>\n
  • Globally unique 48-bit node address<\/li>\n
  • Compatible with EUI-48 and EUI-64<\/li>\n
  • 1.7V to 5.5V wide operating voltage<\/li>\n
  • 1uA max standby current<\/li>\n
  • Schmitt trigger inputs for noise suppression<\/li>\n
  • Half array write protection<\/li>\n
  • >4000V ESD protection<\/li>\n
  • Up to 3 address pins for bus expansion<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Network device MAC address provisioning<\/li>\n
    • IoT node identification<\/li>\n
    • Ethernet interface MAC storage<\/li>\n
    • Embedded system device serialization<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 24AA02E48T-I\/OT from Microchip Technology is a 2Kb I2C serial EEPROM pre-programmed with a globally unique EUI-48 MAC address in a 5-pin SOT-23 package. Operating from 1.7V to 5.5V with 1MHz clock rate at 2.5V+, it eliminates the need for MAC address programming during production. Key Specifications Density 2 Kbit (256 x 8) […]<\/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":[13,20],"tags":[],"chip_brand":[134],"class_list":["post-5438","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-microchip"],"acf":{"brief_explanation":"2Kb I2C EEPROM with EUI-48 MAC, 1MHz, 1.7-5.5V, SOT-23-5","date_code":"","package_case":"SOT-23-5 (3.1 x 1.8 x 1.3 mm)","in_stock":12433,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/20002124D.pdf","price":"$0.29 @ 1ku","product_introduction":"The 24AA02E48T-I\/OT from Microchip Technology is a 2Kb I2C serial EEPROM pre-programmed with a globally unique EUI-48 MAC address in a 5-pin SOT-23 package. The E48 in the part number indicates the factory-programmed EUI-48 node identity, guaranteed globally unique. The I suffix denotes industrial temperature range (-40 to +85C), T indicates tape and reel packaging, and OT denotes the SOT-23-5 package. The device is organized as two 128x8-bit memory blocks: the upper half contains the read-only 48-bit MAC address, while the lower 1Kb is available for general-purpose data storage. The 1uA maximum standby current and 1mA active current make it ideal for battery-powered applications. The EUI-48 MAC address eliminates the need for manufacturers to program unique identifiers during production, reducing assembly time and ensuring no duplicate MAC addresses.","working_principle":"The 24AA02E48 operates through three subsystems: (1) EEPROM Array: 2Kbit of electrically erasable PROM organized as 256x8-bit. The upper half is factory-locked with the EUI-48 MAC address (6 bytes at the top of the address space), permanently read-only. The lower half provides 1Kb of general-purpose EEPROM storage with byte and 8-byte page write capability, 1 million cycle endurance, and 200+ year data retention. (2) I2C Interface: A standard 2-wire I2C interface with Schmitt-trigger filtered inputs. The device supports standard mode (100kHz), fast mode (400kHz at 1.7V), and fast mode plus (1MHz at 2.5V+). The MAC address is accessed through a dedicated I2C slave address separate from the main EEPROM array address. (3) Address Configuration: Up to 3 address pins (A0, A1, A2) allow up to 8 devices on the same I2C bus. In the SOT-23-5 package, the A0 pin is shared with the SCL pin function, allowing 2 devices on the same bus.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>A0\/SCL<\/td>I\/O<\/td>Address bit \/ shared with SCL in SOT-23<\/td><\/tr>
      2<\/td>VSS<\/td>Power<\/td>Ground<\/td><\/tr>
      3<\/td>SDA<\/td>I\/O<\/td>Serial data (bidirectional, open-drain)<\/td><\/tr>
      4<\/td>VCC<\/td>Power<\/td>Supply voltage (1.7-5.5V)<\/td><\/tr>
      5<\/td>WP<\/td>Input<\/td>Write protect (HIGH=protect upper half)<\/td><\/tr><\/table>","application_scenarios":"
      • Ethernet device MAC address with factory-programmed EUI-48 eliminating production-line serialization<\/li>
      • IoT node identification with 2Kb EEPROM for configuration data and globally unique 48-bit ID<\/li>
      • Network interface card with 1MHz I2C at 3.3V and 1uA standby for always-on availability<\/li>
      • Embedded system device serialization with read-only MAC address and write-protectable user EEPROM<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Density<\/th>Address<\/th>Notes<\/th><\/tr>
        24AA02E64T-I\/OT<\/td>Microchip<\/td>2Kb<\/td>EUI-64<\/td>64-bit MAC version<\/td><\/tr>
        24AA025E48T-I\/OT<\/td>Microchip<\/td>2Kb<\/td>EUI-48<\/td>16-byte page write<\/td><\/tr>
        AT24CS01-STUM-T<\/td>Microchip<\/td>1Kb<\/td>128-bit SN<\/td>Smaller, serial number only<\/td><\/tr>
        24AA02T-I\/OT<\/td>Microchip<\/td>2Kb<\/td>No<\/td>Without MAC address<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5438","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=5438"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5438\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5438"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}