DS1742是Maxim美信半导体公司的一款1-Wire器件产品，DS1742是Y2K兼容、非易失时钟RAM，本站介绍了DS1742的封装应用图解、特点和优点、功能等，并给出了与DS1742相关的Maxim元器件型号供参考。
DS1742 - Y2K兼容、非易失时钟RAM - 1-Wire器件 - Maxim美信半导体高性能芯片品质 - 美信半导体
The DS1742 is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) and 2k x 8 nonvolatile static RAM. User access to all registers within the DS1742 is accomplished with a bytewide interface as shown in Figure 1. The RTC information and control bits reside in the eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for the day of the month and leap year are made automatically.
The RTC clock registers are double-buffered to avoid access of incorrect data that can occur during clock update cycles. The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by access to time register data. The DS1742 also contains its own power-fail circuitry, which deselects the device when the VCC supply is in an out-of-tolerance condition. This feature prevents loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
