{"id":3290,"date":"2026-06-01T00:17:13","date_gmt":"2026-06-01T00:17:13","guid":{"rendered":"https:\/\/materialparts.com\/ds1307zntr-2\/"},"modified":"2026-06-01T00:17:13","modified_gmt":"2026-06-01T00:17:13","slug":"ds1307zntr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ds1307zntr-2\/","title":{"rendered":"DS1307ZN+T&R"},"content":{"rendered":"

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

The DS1307ZN+T&R from Analog Devices (formerly Maxim Integrated) is a 64 x 8 serial real-time clock (RTC) with 56 bytes of battery-backed NV SRAM. It communicates via a 2-wire I2C interface, operates from a 5 V supply with a separate battery backup input, and features automatic power-fail detection and switch-over. The device is packaged in an 8-pin SOIC.<\/p>\n

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\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nI2C (2-wire serial)<\/td>\n<\/tr>\n
Supply Voltage (VCC)<\/td>\n4.5 V to 5.5 V<\/td>\n<\/tr>\n
Battery Backup Voltage<\/td>\n2.0 V to 3.5 V<\/td>\n<\/tr>\n
Timekeeping Current (VBAT)<\/td>\n500 nA typical<\/td>\n<\/tr>\n
NV SRAM<\/td>\n56 bytes (battery-backed)<\/td>\n<\/tr>\n
Clock Format<\/td>\nBCD (24-hour or 12-hour with AM\/PM)<\/td>\n<\/tr>\n
I2C Address<\/td>\n0x68 (7-bit)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40\u00b0C to 85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Complete real-time clock with seconds through year tracking<\/li>\n
  • 56 bytes of battery-backed NV SRAM for data storage<\/li>\n
  • Automatic power-fail detect and switch-over circuitry<\/li>\n
  • 2-wire I2C serial interface for simple connection<\/li>\n
  • Programmable square-wave output (1 Hz, 4 kHz, 8 kHz, 32 kHz)<\/li>\n
  • 24-hour or 12-hour clock format with AM\/PM indicator<\/li>\n
  • Valid time through year 2100 with leap year compensation<\/li>\n
  • Ultra-low 500 nA timekeeping current on battery backup<\/li>\n<\/ul>\n

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      \n
    • Embedded system timekeeping and date stamping<\/li>\n
    • Data logging with timestamp for industrial and medical devices<\/li>\n
    • Consumer electronics with persistent clock<\/li>\n
    • POS terminals and billing systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The DS1307ZN+T&R from Analog Devices (formerly Maxim Integrated) is a 64 x 8 serial real-time clock (RTC) with 56 bytes of battery-backed NV SRAM. It communicates via a 2-wire I2C interface, operates from a 5 V supply with a separate battery backup input, and features automatic power-fail detection and switch-over. The device is […]<\/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":[13,29],"tags":[],"chip_brand":[165],"class_list":["post-3290","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-adi"],"acf":{"brief_explanation":"I2C RTC, 5 V, 56B NV SRAM, auto power-fail detect, 500 nA backup, SOIC-8","date_code":"","package_case":"SOIC-8 (4.90 x 3.91 mm)","in_stock":7800,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/DS1307.pdf","price":"$1.85 @ 1ku","product_introduction":"The DS1307ZN+T&R from Analog Devices is a serial real-time clock (RTC) that provides seconds, minutes, hours, day, date, month, and year information through a simple 2-wire I2C interface. The device operates from a 5 V main supply while maintaining timekeeping from a separate backup battery when main power is lost, with automatic power-fail detection and seamless switch-over between supplies. The clock operates in either 24-hour or 12-hour format with an AM\/PM indicator, and includes automatic leap year compensation valid through the year 2100. In addition to the timekeeping registers, the DS1307 provides 56 bytes of battery-backed NV SRAM that can be used to store critical system parameters that must survive power interruptions. A programmable square-wave output on the SQW\/OUT pin can generate 1 Hz, 4.096 kHz, 8.192 kHz, or 32.768 kHz signals. The timekeeping current on battery backup is only 500 nA typical, ensuring years of continuous operation from a single coin cell.","working_principle":"The DS1307ZN+T&R operates through four functional subsystems: (1) The oscillator and timekeeping block uses an external 32.768 kHz crystal connected to the X1 and X2 pins as the timebase. The internal oscillator circuit divides the crystal frequency to generate 1 Hz ticks that increment the time registers. All time and date registers are in BCD format for easy readout. (2) The power management circuit monitors VCC and VBAT voltages. When VCC falls below VBAT, the device automatically switches to battery backup, disabling all outputs and the I2C interface to minimize battery drain. When VCC returns above VBAT, the device switches back to main power and resumes normal operation. (3) The I2C interface operates as a slave device at address 0x68 (7-bit), supporting standard mode (100 kHz) communication. The master can read or write the eight time\/date registers and the 56 NV SRAM bytes. (4) The square-wave output generator divides the 32.768 kHz oscillator signal to produce programmable frequency outputs on the SQW\/OUT pin, which can also be controlled as a simple logic output via the control register.","pin_description":"
      Pin No.<\/td>Pin Name<\/td>Function<\/td><\/tr>
      1<\/td>X1<\/td>32.768 kHz crystal input<\/td><\/tr>
      2<\/td>X2<\/td>32.768 kHz crystal output<\/td><\/tr>
      3<\/td>VBAT<\/td>Battery backup supply (+3 V typical)<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>SDA<\/td>I2C serial data (bidirectional)<\/td><\/tr>
      6<\/td>SCL<\/td>I2C serial clock input<\/td><\/tr>
      7<\/td>SQW\/OUT<\/td>Square-wave output or logic output<\/td><\/tr>
      8<\/td>VCC<\/td>Main supply voltage (4.5 V to 5.5 V)<\/td><\/tr><\/table>","application_scenarios":"
      • Embedded Linux and MCU systems requiring persistent timekeeping across power cycles with battery backup and automatic power-fail detection<\/li>
      • Data logging systems in industrial and medical devices where 56 bytes of NV SRAM stores critical calibration or configuration data alongside timestamps<\/li>
      • POS terminals and billing systems needing accurate date\/time stamping with leap year compensation through 2100<\/li>
      • Consumer electronics with always-on clock display using 500 nA backup current from a CR2032 coin cell for years of unattended operation<\/li><\/ul>","alternative_models":"
        Model<\/td>Brand<\/td>Interface<\/td>NV RAM<\/td>Backup Current<\/td><\/tr>
        DS3231SN#<\/td>ADI<\/td>I2C<\/td>236 B<\/td>200 nA<\/td><\/tr>
        MCP7940N-I\/SN<\/td>Microchip<\/td>I2C<\/td>64 B<\/td>1.2 uA<\/td><\/tr>
        PCF8563BS<\/td>NXP<\/td>I2C<\/td>0<\/td>250 nA<\/td><\/tr>
        RV-8803-C3<\/td>Micro Crystal<\/td>I2C<\/td>0<\/td>240 nA<\/td><\/tr>
        DS1337Z+<\/td>ADI<\/td>I2C<\/td>0<\/td>800 nA<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3290","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=3290"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3290\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3290"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3290"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}