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 count of over 136 years. A built-in power-sense circuit detects power failures, automatically switches to the backup supply, and controls the timer. If an external event timer is desired, the control input EXT can control the counter operation. An open-drain output provides an interrupt, and a square-wave output provides a programmable square wave. The DS1318 is accessed through a byte-wide parallel interface, and operates over the industrial temperature range.
Key Features
Applications/Uses
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 Circuit Allows Timer to Provide Primary or Battery Operation Times
Timer can Alternately Provide an Event Timer of Either an Active-High or Active-Low Pulse
Interrupt Output Generated Periodically or When the Upper 32 Bits of the Counter Match an Alarm Register
Square-Wave Output with 16 Selectable Frequencies from 32.768kHz to 0.5Hz
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
Download
E-Mail