DS1374C-33#T&R

DS1374C-33#T&R is a I2C, 32bit binary counter watchdog RTC with trickle charger and reset input/output. It 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 non volatile (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. Typical applications include portable instruments, point-of-sale equipment, medical equipment and telecommunications.

• 3.3V supply voltage
• Second binary counter provides time-of-day alarm, watchdog timer, or NV RAM
• Separate square-wave and interrupt output pins
• Automatic power-fail detect and switch circuitry
• Single-pin pushbutton reset input/open-drain reset output
• Low-voltage operation
• Trickle-charge capability
• Available in 16 pin SOIC package
• Underwriters Laboratories (UL) recognized

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