Integrated NV SRAM, real time clock, crystal, power-fail control circuit and lithium energy source Clock registers are accessed identical to the static RAM. These registe.

the life expectancy of the DS1543 will be approximately equal to the shelf life (expected useful life of the internal l.

A0-A12 - Address Input DQ0-DQ7 - Data Input/Outputs IRQ FT - Interrupt, Frequency Test Output (Open-Drain) RST - Power-On Reset Output (Open-Drain) CE - Chip Enable OE - Output Enable WE VCC GND NC - Write Enable - Power Supply Input - Grou.

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