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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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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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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.
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.
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