{"id":2482,"date":"2026-05-21T01:19:47","date_gmt":"2026-05-21T01:19:47","guid":{"rendered":"https:\/\/materialparts.com\/ds1338z-33\/"},"modified":"2026-05-21T01:19:47","modified_gmt":"2026-05-21T01:19:47","slug":"ds1338z-33","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ds1338z-33\/","title":{"rendered":"DS1338Z-33+"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The DS1338Z-33+ from Analog Devices (Maxim Integrated) is an I2C real-time clock (RTC) with 56 bytes of NV SRAM. It features full BCD clock\/calendar, automatic power-fail detect and switch, programmable square-wave output, and operates from 3.0V to 5.5V with battery backup in an 8-SOIC package.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629<\/td>\nAnalog Devices (Maxim)<\/td>\n<\/tr>\n
\u0627\u0644\u0646\u0648\u0639<\/td>\nI2C Real-Time Clock<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3.0V to 5.5V<\/td>\n<\/tr>\n
Battery Voltage<\/td>\n1.3V to 3.7V<\/td>\n<\/tr>\n
Timekeeping Current<\/td>\n200uA max @ 5.5V<\/td>\n<\/tr>\n
Battery Backup Current<\/td>\n500nA typical<\/td>\n<\/tr>\n
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nI2C (2-wire serial)<\/td>\n<\/tr>\n
NV SRAM<\/td>\n56 bytes<\/td>\n<\/tr>\n
Time Format<\/td>\nHH:MM:SS (12\/24 hour)<\/td>\n<\/tr>\n
Date Format<\/td>\nYY-MM-DD-day<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n8-SOIC (5.0 x 4.0mm)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40C to +85C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Full BCD clock\/calendar with leap year compensation valid to 2100<\/li>\n
  • 56-byte battery-backed general-purpose RAM<\/li>\n
  • I2C serial interface<\/li>\n
  • Programmable square-wave output signal<\/li>\n
  • Automatic power-fail detect and switch circuitry<\/li>\n
  • 12-hour or 24-hour format with AM\/PM indicator<\/li>\n
  • UL recognized component<\/li>\n
  • Operating temperature: -40C to +85C<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Consumer electronics (set-top boxes, digital recording)<\/li>\n
    • Handheld devices (GPS, POS terminals)<\/li>\n
    • Office equipment (fax, printer, copier)<\/li>\n
    • Medical devices<\/li>\n
    • Telecommunications (routers, servers)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The DS1338Z-33+ from Analog Devices (Maxim Integrated) is an I2C real-time clock (RTC) with 56 bytes of NV SRAM. It features full BCD clock\/calendar, automatic power-fail detect and switch, programmable square-wave output, and operates from 3.0V to 5.5V with battery backup in an 8-SOIC package. Key Specifications Manufacturer Analog Devices (Maxim) Type I2C […]<\/p>\n","protected":false},"author":2,"featured_media":2767,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,55],"tags":[],"chip_brand":[165],"class_list":["post-2482","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-transistors","chip_brand-adi"],"acf":{"brief_explanation":"I2C RTC with 56B NV SRAM, 3-5.5V, auto power-fail switch, 8-SOIC","date_code":"","package_case":"8-SOIC (5.0 x 4.0 x 1.5mm)","in_stock":1053,"datasheet":"https:\/\/www.analog.com\/en\/products\/ds1338.html","price":"$3.86 @ 1ku","product_introduction":"The Analog Devices DS1338Z-33+ is a low-power, full binary-coded decimal (BCD) clock\/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C interface. The clock\/calendar provides seconds, minutes, hours, day, date, month, and year information with automatic month-end adjustments including leap year correction valid up to 2100. The clock operates in 24-hour or 12-hour format with AM\/PM indicator. A built-in power-sense circuit detects power failures and automatically switches to the backup battery supply, maintaining time and date operation. The programmable square-wave output provides frequency options for system timing needs.","working_principle":"The DS1338Z-33+ operates as an I2C real-time clock with three key subsystems: 1) Clock\/Calendar Core: An internal oscillator driven by an external 32.768kHz crystal provides the timebase. The oscillator output is divided down to 1Hz for timekeeping. The BCD counters track seconds, minutes, hours, day, date, month, and year with automatic carry logic for all transitions including leap years. 2) NV SRAM: 56 bytes of SRAM are battery-backed through the VBAT pin. When VCC fails below VBAT, the internal power-switching circuit disconnects VCC and connects VBAT to the SRAM and clock, preserving data and timekeeping with typical 500nA battery current. 3) I2C Interface: The device acts as an I2C slave, responding to read\/write commands for both the time registers (addresses 0x00-0x07) and the NV SRAM (addresses 0x08-0x3F).","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>X1<\/td>Input<\/td>32.768kHz crystal input<\/td><\/tr>
      2<\/td>X2<\/td>Output<\/td>32.768kHz crystal output<\/td><\/tr>
      3<\/td>VBAT<\/td>Power<\/td>Battery backup supply (1.3V to 3.7V)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      5<\/td>SDA<\/td>I\/O<\/td>I2C serial data<\/td><\/tr>
      6<\/td>SCL<\/td>Input<\/td>I2C serial clock<\/td><\/tr>
      7<\/td>SQW\/OUT<\/td>Output<\/td>Square-wave output<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>Main supply voltage (3.0V to 5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • System timekeeping in embedded controllers and POS terminals<\/li>
      • Data logging timestamping in industrial equipment<\/li>
      • Battery-backed time reference in medical devices<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ADI\/Maxim<\/td>DS1307Z+<\/td>8-SOIC<\/td>5V version, same family<\/td><\/tr>
        ADI\/Maxim<\/td>DS1338U-33+<\/td>8-uMAX<\/td>Same function, uMAX package<\/td><\/tr>
        ST<\/td>M41T62LC6<\/td>8-SOIC<\/td>I2C RTC with SRAM<\/td><\/tr>
        Microchip<\/td>MCP7940N-I\/SN<\/td>8-SOIC<\/td>I2C RTC, 64B SRAM<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=2482"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2482\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media\/2767"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2482"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2482"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}