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DS1371
Analog Real-Time Clock IC - RTC DS1371
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DS1371

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I²C, 32-Bit Binary Counter Watchdog Clock

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

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Product Details

See parametric specs for Timekeeping & Real-Time Clocks

Key Features

See parametric specs for Timekeeping & Real-Time Clocks
Parametric specs for Timekeeping & Real-Time Clocks
Interface I2C
VSUPPLY (V) 1.7 to 5.5
Date/ Time Format (hh = sec/100) Binary
Time Keeping Current (nA) (typ) 800
CL (pF) 6
Memory Type None
Time of Day Alarms 1
Package/Pins UMAX/8
Budgetary
Price (See Notes) 		1.54
See parametric specs for Timekeeping & Real-Time Clocks
View Less

Simplified Block Diagram

Technical Docs

Data Sheet I²C, 32-Bit Binary Counter Watchdog Clock Jul 09, 2007
App Note Using the Watchdog/Alarm Counter in the DS1371 and DS1374 Real-Time Clocks
App Note Using the DS1672 Low-Voltage Serial Timekeeping IC
App Note Design Considerations for Maxim Real-Time Clocks
App Note Crystal Considerations with Maxim Real-Time Clocks (RTCs)
App Note DS1371/DS1372/DS1374 32-Bit Binary Counter Time Conversion
Tutorial Blood Pressure Monitor Design Considerations
Tutorial Tips for Writing Bulletproof Real-Time Clock Control Code

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 .

Parameters

Parametric specs for Timekeeping & Real-Time Clocks
Interface I2C
VSUPPLY (V) 1.7 to 5.5
Date/ Time Format (hh = sec/100) Binary
Time Keeping Current (nA) (typ) 800
CL (pF) 6
Memory Type None
Time of Day Alarms 1
Package/Pins UMAX/8
Budgetary
Price (See Notes) 		1.54
See parametric specs for Timekeeping & Real-Time Clocks

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

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.

Simplified Block Diagram

DS1371: Typical Operating Circuit DS1371: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet I²C, 32-Bit Binary Counter Watchdog Clock Jul 09, 2007
App Note Using the Watchdog/Alarm Counter in the DS1371 and DS1374 Real-Time Clocks
App Note Using the DS1672 Low-Voltage Serial Timekeeping IC
App Note Design Considerations for Maxim Real-Time Clocks
App Note Crystal Considerations with Maxim Real-Time Clocks (RTCs)
App Note DS1371/DS1372/DS1374 32-Bit Binary Counter Time Conversion
Tutorial Blood Pressure Monitor Design Considerations
Tutorial Tips for Writing Bulletproof Real-Time Clock Control Code

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 .