SM8580AM-G is available to buy in increments of 100
Real-time clock IC
RTC 4-bit parallel interface for µcontroller. Seconds to Years counter, clock and calendar circuits including leap year adjustment to 2099, alarm and timer interrrupt functions, clock counter change detect functions, ±30 second correction function, time error correction function, and built-in temperature sensor. Interface compatiable with general purpose SRAM on high speed bus.