Maxim Integrated MAX6902
The MAX6902 SPI™-compatible real-time clock contains a real-time clock/calendar and 31 x 8 bits of static random-access memory (SRAM). The real-time clock/calendar provides seconds, minutes, hours, day, date, month, year, and century 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.
| Part No. |
MAX6902 |
| Datasheet |
MAX6902
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| Manufacturer |
 Maxim Integrated |
| Description |
I2C-Compatible RTC |
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GENERAL DESCRIPTION
A time/date programmable polled ALARM is included in the MAX6902. The clock operates in either the 24hr or 12hr format with an AM/PM indicator. The MAX6902 operates with a supply voltage of +2V to +5.5V, is available in the ultra-small 8-pin TDFN package, and works over the -40°C to +85°C industrial temperature range. FEATURES
o Real-Time Clock Counts Seconds, Minutes, Hours, Day of Week, Date of Month, Month, Year, and Century o Leap-Year Compensation Valid up to Year 2100 o +2V to +5.5V Wide Operating Voltage Range o SPI Interface: 4MHz at 5V; 1MHz at 2V o 31 x 8-Bit SRAM for Scratchpad Data Storage o Uses Standard 32.768kHz, 12.5pF Watch Crystal o Low Timekeeping Current (400nA at 2V) o Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock Registers or SRAM o Ultra-Small 8-Pin 3mm x 3mm x 0.8mm TDFN Package o Programmable Time/Date Polled ALARM Function o No External Crystal Bias Resistors or Capacitors Required MAX6902 APPLICATIONS
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