DS1371

I²C, 32-Bit Binary Counter Watchdog Clock

Industry's Lowest-Cost Single-Supply Binary Timekeeper for Ultra-Low-Power Applications

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Status Explanations for product status codes

Active: In Production.

Description

The DS1371 is a 32-bit binary counter that is designed to continuously count time in seconds. An additional counter that can generate a periodic alarm or serve as a watchdog timer is also provided. If enabled as a watchdog timer, the watchdog strobe input pin provides a hardware reset of the counter. If disabled, this counter can be used as 3 Bytes of general-purpose RAM. A configurable output can be used as an interrupt or provide a square wave at one of four selectable frequencies. The device is programmed serially through a I²C bidirectional bus.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 4 (PDF, 1.2MB)
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Key Features

  • 32-Bit Binary Counter
  • 24-Bit Binary Counter Provides Periodic Alarm, Watchdog Timer, or RAM
  • Strobe Input to Reset Watchdog Timer
  • Single Output Configurable as Interrupt or Square Wave
  • I²C Serial Interface
  • Low-Voltage Operation
  • Operating Temperature Range: -40°C to +85°C
  • Available in 8-Pin µSOP
 

Applications/Uses

  • Elapsed Time Measurements
  • Point-of-Sale Equipment
  • Portable Instrumentation
  • Servers
   

Key Specifications:

Timekeeping & Real-Time Clocks
Part Number Functions Date/ Time Format Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Time of Day Alarms Integrated XTAL Budgetary Price
hh = sec/100 typ See Notes
DS1371  Elapsed Time Counter Binary I2C
2
3
3.3
5
800 6 None 1 No $0.92 @1k
See All Timekeeping & Real-Time Clocks (86)
Pricing 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.


Diagram

DS1371: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release 2002-11-21 ]

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Rev 4; 2007-07-09
This page last modified: 2009-10-14




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