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I²C, 32-Bit Binary Counter Watchdog Clock

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

Product Details

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.

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
Parametric specs for All Real-Time Clocks
Interface I2C
VSUPPLY (V) 2
3
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)
$1.32 @1k
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Simplified Block Diagram

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

Design & Development

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Support & Training

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Parameters

Parametric specs for All Real-Time Clocks
Interface I2C
VSUPPLY (V) 2
3
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)
$1.32 @1k

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

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.