DS1746P-70+

Clock/Timing - Real Time Clocks

The DS1746P-70+ Real Time Clock is an electronically programmable time-keeping device. It is used to keep track of time, the date and other related information, such as the time zone, UTC (Coordinated Universal Time) offsets and daylight savings time.

The DS1746P-70+ is made up of a clock block, a battery-backed memory and a controller that communicates with the host processor. In order for the host processor to access the clock information, it must communicate with the controller via an I2C or SPI interface. The clock has four main registers: the time register, the date register, the time zone register, and the time/date register. The time register is responsible for keeping track of the clock information, while the other three registers are used to set the time zone, time/date information and daylight saving time.

Application Field

Due to its programmable design and its ability to keep track of the time and date, the DS1746P-70+ Real Time Clock can be used in a variety of applications. These include consumer electronics, embedded systems, computers, telecommunications and industrial applications. The DS1746P-70+ is especially well-suited for systems which require accurate real-time clock performance and extreme temperatures.

Working Principle

The DS1746P-70+ Real Time Clock works by counting cycles of a stable oscillator frequency, known as an oscillation cycle. It is a quartz crystal oscillator which generates a fixed frequency output, usually 32,768 Hz. This oscillation cycle is used to keep track of the time, date and other related information. The information is stored in the time register, the date register, the time zone register and the time/date register.

The DS1746P-70+ also uses a battery-backed memory to maintain data when power is lost. This ensures that the clock operates accurately even when power is not available. The battery-backed memory stores information such as the current time and date, the time zone, UTC and daylight saving time. The memory also stores information on the offset time and time zone.

The DS1746P-70+ also has adjustable alarm settings. It can trigger alarms based on individual days or multiple days, as well as a ‘one-shot’ alarm setting, which will trigger an alarm only once. The alarm settings can be used to trigger an alarm for a certain event or at a set interval.

The DS1746P-70+ is a reliable and accurate real-time clock that has been designed for small size, low power and extreme temperatures. It offers a single IC solution for applications that require accurate timing control for the most demanding environments.