Maxim Integrated DS1347T+T&R, Real Time Clock, 8-Pin TDFN-EP

Completely Manages All Timekeeping Functions
RTC Counts Seconds, Minutes, Hours, Day of Week, Date of Month, Month, Year, and Century
Leap-Year Compensation
31 x 8-Bit SRAM for Scratchpad Data Storage
Programmable Time/Date Polled ALARM Function
Uses Standard 32.768kHz Watch Crystal
Low-Power Operation Extends Battery Life
Low Timekeeping Current (400nA at 2V)
+2V to +5.5V Wide Operating Voltage Range
Standard Serial Port Interfaces with Most Microcontrollers
SPI (Mode 1 or 3) Interface: 4MHz at 5V, 1MHz at 2V
Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock Registers or SRAM
3mm x 3mm x 0.8mm, 8-Pin TDFN Package Minimizes Required Space
No External Crystal Bias Resistors or Capacitors Required
Applications
Battery-Powered Products
Fax Machines
Intelligent Instruments
Point-of-Sale Equipment
Portable Instruments