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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

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.

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)

DS1374, DS1374C, DS1374U: Typical Operating Circuit Applications/Uses Medical Equipment Point-of-Sale Equipment Portable Instrumentation Telecommunications

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Related Products

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