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DS1374, DS1374C, DS1374U
I²C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output
Elapsed Time Counter Provides Power-On Reset, Watchdog or Alarm, and Square Wave
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Status
Description
The DS1374 is a 32-bit binary counter designed to continuously count time in seconds. An additional counter generates a periodic alarm or serves as a watchdog timer. If disabled, this counter can be used as 3 bytes of nonvolatile (NV) RAM. Separate output pins are provided for an interrupt and a square wave at one of four selectable frequencies. A precision temperature-compensated reference and comparator circuit monitor the status of VCC to detect power failures, provide a reset output, and automatically switch to the backup supply when necessary.
Additionally, the reset pin is monitored as a pushbutton input for externally generating a reset. The device is programmed serially through an I²C serial interface.
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Data Sheet
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Key Features
- 32-Bit Binary Counter
- Second Binary Counter Provides Time-of-Day Alarm, Watchdog Timer, or NV RAM
- Separate Square-Wave and Interrupt Output Pins
- I²C Serial Interface
- Automatic Power-Fail Detect and Switch Circuitry
- Single-Pin Pushbutton Reset Input/Open-Drain Reset Output
- Low-Voltage Operation
- Trickle-Charge Capability
- -40°C to +85°C Operating Temperature Range
- 10-Pin µSOP, 16-Pin SO
- Available in a Surface-Mount Package with an
Integrated Crystal (DS1374C)
- Underwriters Laboratories (UL) Recognized
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Applications/Uses
- Medical Equipment
- Point-of-Sale Equipment
- Portable Instrumentation
- Telecommunications
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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 |
| DS1374 |
| Elapsed Time Counter | | Watchdog Timekeeper |
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Binary |
I2C |
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400 |
6 |
None |
1 |
No |
$1.31 @1k |
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See All Timekeeping & Real-Time Clocks (86)
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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.
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Diagram
Typical Operating Circuit
More Information
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Information Index
Document Ref.: 19-5484
Rev 4;
2010-08-30
This page last modified: 2010-08-31
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