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Home » NEWEST Products » New by Manufacturer » Maxim » Maxim Integrated DS134x Low-Current I²C RTCs
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Maxim Integrated DS1341 / DS1342 RTCs

The Maxim Integrated DS134x low-current I²C real-time clock (RTC) for high-ESR crystals is a timekeeping device that provides an extremely low standby current, permitting longer life from a power supply. The Maxim Integrated DS134x RTC supports high-ESR crystals, broadening the pool of usable crystals for the devices. The DS134x is accessed through an I²C serial interface and features two time-of-day alarms, two interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism. The clock / calendar of this Maxim Integrated device provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either 24hr or 12hr format with an AM/PM indicator.

  • Low Timekeeping Current of 250nA (typ)
  • Compatible with Crystal ESR Up to 100kI
  • Use Crystals with CL = 6pF (DS1341) or CL = 12.5pF (DS1342)
  • +1.8V to +5.5V Operating Voltage Range
  • Maintain Time Down to +1.15V (typ)
  • Fast (400kHz) I2C Interface
  • Bus Timeout for Lockup-Free Operation
  • RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Through 2099
  • External Clock Source for Synchronization Clock Reference (e.g., 32kHz, 50Hz/60Hz Power Line, GPS 1PPS)

  • Two Time-of-Day Alarms with Two Interrupt Outputs
  • Programmable Square-Wave Output
  • Industrial Temperature Range
  • Small, 8-Pin μSOP or TDFN Packages
  • Medical
  • Point of Sale (POS)
  • Telematics
  • Portable Instruments
  • Portable Audio
  • Automotive
Typical Operating Circuit
Typical Operating Circuit
Functional Diagram
Functional Diagram
  • Maxim Integrated
  • Semiconductors|IC-Clock & Timer