Rochester Electronics Clock/Timing - Real Time Clocks DS1557P-70IND

The DS1557P-70IND is a real-time clock/calendar (RTC) integrated circuit that features nonvolatile static RAM, a watchdog timer, and a power-on reset function. It is designed for applications requiring precise timekeeping and data retention, with a temperature range of -40¬8C to +85¬8C. The device is Y2K compliant and includes a battery monitor and power-fail control circuitry to ensure data integrity during power fluctuations. The RTC registers provide BCD-coded year, month, date, day, hours, minutes, and seconds, with automatic leap year compensation valid until the year 2100. The device supports a byte-wide interface for accessing clock registers, which reside in the top RAM locations. It also features an interrupt output for alarm functions and a reset output for CPU activity monitoring. The DS1557P-70IND is packaged in a 34-pin PowerCap configuration and is suitable for industrial applications requiring reliable timekeeping and data storage in nonvolatile memory.