DS1374C-3-中文資料美信數(shù)據(jù)手冊PDF規(guī)格書

General Description

The DS1374 is a 32-bit binary counter designed to continuously count time in seconds. An additional counter gen erates 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 refer ence and comparator circuit monitor the status of VCC to detect power failures, provide a reset output, and auto matically 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.

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