DS1643|DS1643P - 非易失时钟RAM

DS1643|DS1643P是Maxim美信半导体公司的一款1-Wire器件产品，DS1643|DS1643P是非易失时钟RAM，本站介绍了DS1643|DS1643P的封装应用图解、特点和优点、功能等，并给出了与DS1643|DS1643P相关的Maxim元器件型号供参考。

DS1643|DS1643P - 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 DS1643 is an 8K x 8 nonvolatile static RAM with a full function Real Time Clock (RTC) that are both accessible in a byte-wide format. The nonvolatile timekeeping RAM is functionally equivalent to any JEDEC standard 8K x 8 SRAM. The device can also be easily substituted in ROM, EPROM and EEPROM sockets providing read/write nonvolatility and the addition of the real time clock function. The real time clock information resides in the eight uppermost RAM locations. The RTC registers contain 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 DS1643 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.

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