DS12C887+ MAXIM Actual Time Clock Multiplexed

The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The items current a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a typical interrupt output, a programmable sq. wave, and 114 bytes of batterybacked static RAM (113 bytes inside the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium energy provide proper right into a 24-pin encapsulated DIP bundle. The DS12C887 supplies a century byte at sort out 32h. For all items, the date on the end of the month is routinely adjusted for months with fewer than 31 days, along with correction for leap years. The items moreover operate in each 24-hour or 12-hour format with an AM/PM indicator. A precision temperature-compensated circuit screens the standing of VCC. If a predominant vitality failure is detected, the gadget routinely switches to a backup present. A lithium coin-cell battery could also be associated to the VBAT enter pin on the DS12885 to deal with time and date operation when predominant vitality is absent. The gadget is accessed by way of a multiplexed byte-wide interface, which helps every Intel and Motorola modes.