DS1743|DS1743P - Y2K兼容、非易失时钟RAM

DS1743|DS1743P是Maxim美信半导体公司的一款1-Wire器件产品，DS1743|DS1743P是Y2K兼容、非易失时钟RAM，本站介绍了DS1743|DS1743P的封装应用图解、特点和优点、功能等，并给出了与DS1743|DS1743P相关的Maxim元器件型号供参考。

DS1743|DS1743P - 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

产品概述

The DS1743 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 8k x 8 nonvolatile static RAM. User access to all registers within the DS1743 is accomplished with a bytewide interface as shown in Figure 1 in the full data sheet. 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 binary-coded decimal (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 DS1743 also contains its own power-fail circuitry, which deselects the device when the VCC supply is in an out-of-tolerance condition. When VCC is above VPF, the device is fully accessible. When VCC is below VPF, the internal active-low CE signal is forced high, preventing any access. When VCC rises above VPF, access remains inhibited for TREC, allowing time for the system to stabilize. These features prevent loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.

关键特性

热门应用

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