{"id":7098,"date":"2026-06-23T03:42:56","date_gmt":"2026-06-23T03:42:56","guid":{"rendered":"https:\/\/materialparts.com\/mcp79412t-i-sn\/"},"modified":"2026-06-23T03:42:56","modified_gmt":"2026-06-23T03:42:56","slug":"mcp79412t-i-sn","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mcp79412t-i-sn\/","title":{"rendered":"MCP79412T-I\/SN"},"content":{"rendered":"

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

The MCP79412T-I\/SN from Microchip Technology is an I2C RTC (Real-Time Clock) with 64 bytes of EEPROM and a unique 48-bit ID in an SOIC-8 package. It provides accurate timekeeping with battery backup, programmable alarms, and calibration for drift correction.<\/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
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nI2C (up to 400kHz)<\/td>\n<\/tr>\n
Timekeeping<\/td>\nSeconds through century calendar<\/td>\n<\/tr>\n
EEPROM<\/td>\n64 bytes (SRAM) + 128 bytes EEPROM<\/td>\n<\/tr>\n
Unique ID<\/td>\n48-bit pre-programmed EUI-48<\/td>\n<\/tr>\n
Alarms<\/td>\n2 programmable<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n1.8 V to 5.5 V<\/td>\n<\/tr>\n
\u0628\u0637\u0627\u0631\u064a\u0629 \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629<\/td>\nYes (VBAT pin)<\/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

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Complete RTC with date, time, and century tracking<\/li>\n
  • 48-bit unique ID for device identification<\/li>\n
  • 64 bytes battery-backed SRAM for critical data<\/li>\n
  • 128 bytes EEPROM for non-volatile parameter storage<\/li>\n
  • Two programmable alarms with interrupt output<\/li>\n
  • Digital calibration for crystal drift compensation<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Embedded system timekeeping with battery backup<\/li>\n
    • Data logging timestamps<\/li>\n
    • Power management wake-up scheduling<\/li>\n
    • Device identification using 48-bit unique ID<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MCP79412T-I\/SN from Microchip Technology is an I2C RTC (Real-Time Clock) with 64 bytes of EEPROM and a unique 48-bit ID in an SOIC-8 package. It provides accurate timekeeping with battery backup, programmable alarms, and calibration for drift correction. Key Specifications Interface I2C (up to 400kHz) Timekeeping Seconds through century calendar EEPROM 64 […]<\/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":[13,20],"tags":[],"chip_brand":[134],"class_list":["post-7098","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-microchip"],"acf":{"brief_explanation":"I2C RTC with EEPROM, 48-bit unique ID, dual alarm, SOIC-8, battery backup, calibration","date_code":"","package_case":"SOIC-8 (4.90 x 3.91 x 1.58 mm)","in_stock":10136,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/MCP79412","price":"$0.98 @ 1ku","product_introduction":"The MCP79412T-I\/SN from Microchip Technology is an I2C Real-Time Clock (RTC) with integrated EEPROM and a unique 48-bit ID in an SOIC-8 package. The device maintains seconds, minutes, hours, day, date, month, year, and century with automatic leap year correction. A battery backup input (VBAT) maintains timekeeping when main power is lost. The device includes 64 bytes of battery-backed SRAM, 128 bytes of EEPROM, and two programmable alarms with interrupt output. Digital calibration allows correction of crystal frequency drift over temperature. The 48-bit pre-programmed unique ID provides device identification for security or inventory management.","working_principle":"The MCP79412T-I\/SN integrates an RTC, EEPROM, and unique ID on a single chip. (1) RTC: A 32.768kHz crystal oscillator provides the timebase. The oscillator drives a counter chain that divides down to 1Hz for seconds counting. The time and date registers are accessed via I2C. The oscillator can be digitally calibrated by adding or subtracting clock cycles over a calibration window, compensating for crystal frequency tolerance and temperature drift. (2) Battery Backup: When VCC falls below VBAT, the internal power switch connects the RTC and SRAM to the VBAT supply, maintaining timekeeping. The oscillator automatically switches to low-power mode. (3) Alarms: Two alarm registers can be set to match any combination of seconds, minutes, hours, day, or date. When a match occurs, the MFP output is asserted and the alarm flag is set. (4) EEPROM: 128 bytes of non-volatile EEPROM are accessed via separate I2C address, with 1 million write cycle endurance.","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<\/td><\/tr>
      4<\/td>VSS<\/td>Ground<\/td>Ground<\/td><\/tr>
      5<\/td>SDA<\/td>I\/O<\/td>I2C data<\/td><\/tr>
      6<\/td>SCL<\/td>Input<\/td>I2C clock<\/td><\/tr>
      7<\/td>MFP<\/td>Output<\/td>Multi-function output (alarm\/interrupt)<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>Main supply (1.8-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Embedded system timekeeping with battery backup for power-loss recovery<\/li>
      • Data logging timestamps with digital calibration for accuracy<\/li>
      • Power management wake-up scheduling with dual alarms<\/li>
      • Device identification and security using 48-bit pre-programmed unique ID<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Microchip<\/td>MCP79410T-I\/SN<\/td>SOIC-8<\/td>Without unique ID<\/td><\/tr>
        Microchip<\/td>MCP79411T-I\/SN<\/td>SOIC-8<\/td>With EUI-48 ID, no EEPROM<\/td><\/tr>
        Maxim<\/td>DS3231SN#<\/td>SOIC-16<\/td>TCXO RTC, higher accuracy<\/td><\/tr>
        ST<\/td>M41T62Q6F<\/td>QFN-16<\/td>Small RTC with event<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7098","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=7098"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7098\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7098"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7098"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}