All versions are being discontinued and are subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for recommended replacements.
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. A time/date
programmable polled ALARM is included in the
MAX6902. 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 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.
Key Features
Applications/Uses
Real-Time Clock Counts Seconds, Minutes, Hours,
Day of Week, Date of Month, Month, Year, and Century
Leap-Year Compensation Valid up to Year 2100
+2V to +5.5V Wide Operating Voltage Range
SPI Interface: 4MHz at 5V; 1MHz at 2V
31 x 8-Bit SRAM for Scratchpad Data Storage
Uses Standard 32.768kHz, 12.5pF Watch Crystal
Low Timekeeping Current (400nA at 2V)
Single-Byte or Multiple-Byte (Burst Mode) Data
Transfer for Read or Write of Clock Registers or
SRAM
Ultra-Small 8-Pin 3mm x 3mm x 0.8mm TDFN
Package
Programmable Time/Date Polled ALARM Function
No External Crystal Bias Resistors or Capacitors
Required
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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