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Parallel-Interface Elapsed Time Counter

Subsecond Elapsed-Time Counter Offers 244µs Resolution

Product Details

Key Features

Parametric specs for Timekeeping & Real-Time Clocks
Interface Bytewide parallel
VSUPPLY (V) 3 to 3.6
Date/ Time Format (hh = sec/100) Binary
Time Keeping Current (nA) (typ) 750
CL (pF) 12.5
Memory Type None
Time of Day Alarms 1
Package/Pins TSSOP/24
Budgetary
Price (See Notes)
2.48
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Simplified Block Diagram

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Sampling:
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Parameters

Parametric specs for Timekeeping & Real-Time Clocks
Interface Bytewide parallel
VSUPPLY (V) 3 to 3.6
Date/ Time Format (hh = sec/100) Binary
Time Keeping Current (nA) (typ) 750
CL (pF) 12.5
Memory Type None
Time of Day Alarms 1
Package/Pins TSSOP/24
Budgetary
Price (See Notes)
2.48

Key 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 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
  • +3.3V Operation
  • Industrial Temperature Range: -40°C to +85°C

Applications/Uses

  • Industrial Controls
  • Power Metering
  • Servers

Description

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.

Simplified Block Diagram

DS1318: Typical Operating Circuit DS1318: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.