DS1318 Datasheet - Maxim Integrated

DS1318 Parallel-Interface Elapsed Time Counter

The DS1318 parallel-interface elapsed time counter (ETC) is a 44-bit counter that maintains the amount of time that the device operates from main and/or backup power or during an external event. The internal frequency of the counter clock is 4.096kHz, which provides a 244µs resolution and a maximum .

DS1318 Features

* Byte-Wide Parallel Interface

* 44-Bit Binary Counter Provides Timer with 244µs Resolution

* Automatic Power-Fail Detect and Switch Circuitry Selects Power Source from the Primary Power and the Battery, and Write Protects the Internal Registers

* Internal Power-Fail

DS1318-MaximIntegrated.pdf