DS1742 - Y2KC Nonvolatile Timekeeping RAM

A0-A10 CE OE WE VCC GND DQ0-DQ7 - Address Inputs - Chip Enable - Output Enable - Write Enable - Power Supply Input - Ground - Data Input/Outputs ORDERING INFORMATION DS1742-XXX (5V) -70 -100 70 ns access 100 ns access DS1742W-XXX (3.3V) -120 120 ns access -150 150 ns access DESCRIPTION The DS1

• Integrated NV SRAM, real time clock, crystal, power-fail control circuit and lithium energy source Clock registers are accessed identical to the static RAM. These registers are resident in the eight top RAM locations Century byte register Totally nonvolatile with over 10 years of operation in the absence of power BCD coded century, year, month, date, day, hours, minutes, and seconds with automatic leap year compensation valid up to the year 2100 Battery voltage level indicator flag Power-fail wr.