Integrated NV SRAM, real-time clock, crystal, power-fail control circuit and lithium energy sourceClock registers are accessed identically to the static RAM. These registers are resident in the eight top RAM locations.Totally nonvolatile with over 10 years of operation in the absence of power BCD coded year, month, date, day, hours, minutes, and seconds with leap year compensation valid up to 2100Power-fail write protection allows for ±10% VCCpower supply toleranceDS1646 only (DIP Module)
— Standard JEDEC bytewide 128k x 8 RAM pinoutDS1646P only (PowerCap® Module Board)
— Surface mountable package for direct connection to PowerCap containing battery and crystal
— Replaceable battery (PowerCap)
— Power-fail output
— Pin-for-pin compatible with other densities of DS164XP Timekeeping RAM |