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MAX6900
I²C-Compatible RTC in a TDFN


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Description
FULL DATA SHEET (PDF, 212kB)
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The MAX6900, I²C*-bus-compatible real-time clock (RTC) in a 6-pin TDFN package contains a real-time clock/calendar and 31-byte x 8-bit wide of static random access memory (SRAM). The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year up to the year 2100. The clock operates in either the 24hr or 12hr format with an AM/PM indicator.

The SOT23 package has been replaced by a TDFN. For addtional information click here.

Key Features   Applications/Uses
  • Real-Time Clock Counts Seconds, Minutes, Hours, Date, Month, Day, and Year
  • Leap Year Compensation Valid up to Year 2100
  • Fast (400kHz) I²C-Bus-Compatible Interface from 2.0V to 5.5V
  • 31 x 8 SRAM for Scratchpad Data Storage
  • Uses Standard 32.768kHz, 12.5pF Load, Watch Crystal
  • Ultra-Low 225nA (typ) Timekeeping Current
  • Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock Registers or SRAM
  • 6-Pin 3mm x 3mm x 0.8mm TDFN Surface-Mount Package
  • No External Crystal Bias Resistors or Capacitors Required
  • Underwriters Laboratories (UL®) Recognized

 
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    Key Specifications:   Timekeeping & Real-Time Clocks
    Part Number Time Format (hh = sec/100) Date Format Interface Supply Voltage (V) Time- keeping Current (typ) (nA) CL, Load Capacitance (pF) Memory Type Memory Size (Bytes) Number of Time of Day Alarms Price**
    MAX6900  HH:MM:SS YYYY-MM-DD I2C 2
    3
    3.3
    5
    500 12.5 NV SRAM 31 0 $1.45 @ 1k
    See All Timekeeping & Real-Time Clocks (86)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX6900: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1942; Rev 3; 2003-07-04
    This page last modified: 2007-06-26



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