{"id":5463,"date":"2026-06-10T02:25:13","date_gmt":"2026-06-10T02:25:13","guid":{"rendered":"https:\/\/materialparts.com\/bq32000dr\/"},"modified":"2026-06-10T02:25:13","modified_gmt":"2026-06-10T02:25:13","slug":"bq32000dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/bq32000dr\/","title":{"rendered":"BQ32000DR"},"content":{"rendered":"

Productos<\/h2>\n

The BQ32000DR from Texas Instruments is an I2C serial real-time clock (RTC) with battery backup and integrated trickle charger in an 8-pin SOIC package. It provides seconds through calendar information with automatic leap-year compensation, programmable calibration from -63ppm to +126ppm, and oscillator-fail detection.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Interface<\/td>\nI2C (up to 400kHz)<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n3.0V to 3.6V (main); 2.0V to 3.6V (backup)<\/td>\n<\/tr>\n
Backup Switchover<\/td>\nAutomatic<\/td>\n<\/tr>\n
Trickle Charger<\/td>\nIntegrated (programmable diode\/resistor)<\/td>\n<\/tr>\n
Crystal<\/td>\n32.768 kHz external<\/td>\n<\/tr>\n
Calibration Range<\/td>\n-63 ppm to +126 ppm (programmable)<\/td>\n<\/tr>\n
Oscillator-Fail Detection<\/td>\nYes (OF flag bit)<\/td>\n<\/tr>\n
STOP Bit<\/td>\nYes (disables oscillator)<\/td>\n<\/tr>\n
Leap Year<\/td>\nAutomatic compensation<\/td>\n<\/tr>\n
Time Format<\/td>\nBCD (HH:MM:SS)<\/td>\n<\/tr>\n
Date Format<\/td>\nBCD (YY-MM-DD, day of week)<\/td>\n<\/tr>\n
Supply Current (main, no crystal)<\/td>\n40 uA typ<\/td>\n<\/tr>\n
Backup Current<\/td>\n500 nA typ @ 3.0V<\/td>\n<\/tr>\n
I2C Address<\/td>\n0x68 (1101000)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
Paquete<\/td>\nSOIC-8 (4,9 x 3,9 mm)<\/td>\n<\/tr>\n
Status<\/td>\nActivo<\/td>\n<\/tr>\n
RoHS<\/td>\nYes<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • I2C interface up to 400kHz<\/li>\n
  • Automatic backup supply switchover<\/li>\n
  • Integrated programmable trickle charger<\/li>\n
  • Oscillator-fail detection (OF flag)<\/li>\n
  • STOP bit for oscillator disable<\/li>\n
  • Programmable calibration: -63ppm to +126ppm<\/li>\n
  • Automatic leap-year compensation<\/li>\n
  • Simultaneous register update prevents timekeeping glitch<\/li>\n
  • Industry-standard DS1337 compatible pinout and register map<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Embedded system timekeeping<\/li>\n
    • Power management scheduling<\/li>\n
    • Data logging timestamps<\/li>\n
    • Industrial and consumer electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ32000DR from Texas Instruments is an I2C serial real-time clock (RTC) with battery backup and integrated trickle charger in an 8-pin SOIC package. It provides seconds through calendar information with automatic leap-year compensation, programmable calibration from -63ppm to +126ppm, and oscillator-fail detection. Key Specifications Interface I2C (up to 400kHz) Supply Voltage 3.0V […]<\/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],"tags":[],"chip_brand":[138],"class_list":["post-5463","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"I2C RTC, battery backup, trickle charger, SOIC-8","date_code":"","package_case":"SOIC-8 (4.9 x 3.9 x 1.58 mm)","in_stock":10389,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/bq32000.pdf","price":"$0.84 @ 1ku","product_introduction":"The BQ32000DR from Texas Instruments is an I2C serial real-time clock (RTC) with integrated battery backup and trickle charger in an 8-pin SOIC package. The D denotes the SOIC-8 package, R denotes tape and reel (2500 pcs\/reel). The device is a compatible replacement for industry-standard RTCs (DS1337 register-compatible) and provides complete clock\/calendar functionality: seconds, minutes, hours (12\/24hr), day, date, month, and year with automatic leap-year compensation valid up to 2099. The automatic backup supply switchover ensures uninterrupted timekeeping when the main power fails, switching to the backup supply (battery or supercapacitor) without glitch. The integrated trickle charger can charge a supercapacitor or rechargeable battery from the main supply with programmable diode and resistor settings. A programmable calibration register allows -63ppm to +126ppm adjustment to compensate for crystal accuracy and temperature drift. The oscillator-fail (OF) flag bit alerts the host if the 32.768kHz crystal stops oscillating. The STOP bit allows the host to disable the oscillator for power saving during storage.","working_principle":"The BQ32000DR operates through four subsystems: (1) Oscillator and Timekeeping: An external 32.768kHz crystal connected to OSCI\/OSCO pins drives the oscillator circuit. The oscillator output is divided down by a 15-stage binary counter (2^15 = 32768) to produce a 1Hz signal that increments the seconds counter. Subsequent counters track minutes, hours, days, date, month, and year. All time registers are updated simultaneously from the counters to prevent timekeeping glitches during read operations. (2) I2C Communication: The host accesses time and control registers via I2C at address 0x68 (7-bit). Reads and writes use standard I2C protocol at up to 400kHz (Fast Mode). Time registers are in BCD format. (3) Power Switchover: A comparator monitors the main supply (VCC) against the backup supply (VBACKUP). When VCC drops below VBACKUP, the internal power mux switches to the backup supply, maintaining oscillation and timekeeping. The backup supply current is only 500nA typical, ensuring long backup life from a coin cell or supercapacitor. (4) Trickle Charger: When VCC is present, the integrated trickle charger can supply current to the backup source through programmable diode (1 or 2 series) and resistor (2kOhm, 4kOhm, or 9kOhm) settings. For a 5.0V VCC with 1 diode and 2kOhm resistor charging a supercapacitor, the charge current is approximately (5.0 - 0.7 - Vcap) \/ 2000.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>VCC<\/td>Power<\/td>Main supply (3.0-3.6V)<\/td><\/tr>
      2<\/td>OSCI<\/td>Input<\/td>Crystal oscillator input (32.768kHz)<\/td><\/tr>
      3<\/td>OSCO<\/td>Output<\/td>Crystal oscillator output<\/td><\/tr>
      4<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      5<\/td>SDA<\/td>I\/O<\/td>I2C serial data (open-drain)<\/td><\/tr>
      6<\/td>SCL<\/td>Input<\/td>I2C serial clock<\/td><\/tr>
      7<\/td>VBACKUP<\/td>Power<\/td>Backup supply input (2.0-3.6V)<\/td><\/tr>
      8<\/td>IRQ\/OUT<\/td>Output<\/td>Interrupt \/ square-wave output<\/td><\/tr><\/table>","application_scenarios":"
      • Embedded system RTC with CR2032 coin cell backup and automatic switchover maintaining timekeeping across power cycles<\/li>
      • Supercapacitor-backed RTC using integrated trickle charger with 1-diode\/4kOhm setting for 0.5mA charge current<\/li>
      • Data logger with calibration register adjusted for -20ppm crystal drift and OF flag monitored for oscillator failure detection<\/li>
      • Industrial controller using STOP bit to disable oscillator during long storage, extending backup battery life<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Backup<\/th>Interface<\/th>Notes<\/th><\/tr>
        DS1337Z+<\/td>Maxim\/ADI<\/td>External<\/td>I2C<\/td>Register-compatible, no trickle charger<\/td><\/tr>
        MCP7940N-I\/SN<\/td>Microchip<\/td>Battery<\/td>I2C<\/td>SRAM, alarm outputs<\/td><\/tr>
        BQ32002DR<\/td>TI<\/td>Battery<\/td>I2C<\/td>Similar with alarm features<\/td><\/tr>
        PCF8563BS<\/td>NXP<\/td>Battery<\/td>I2C<\/td>Low cost, smaller package<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=5463"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5463\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=5463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=5463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=5463"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=5463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}