PCF8593T/1,112

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The PCF8593T/112 is a real time clock (RTC) device used in a variety of applications. It is a highly accurate, low-power RTC that combines two major functions: the clock of time and a calendar. In addition, it has a timer/alarm and a programmable pulse output.

Features

• Powered by a 3.0V lithium-thionyl chloride (Li-SOCl2) battery
• Operates over an extended temperature range of -40°C to +85°C
• Calendar, time and alarm registers
• Programmable timer or pulse output
• Power-fail detection circuitry
• Multi-byte instruction/data compatbles
• Low power consumption

Application Field

The PCF8593T/112 can be used in applications where accurate timing is essential, such as remote sensing, home automation, medical equipment, automotive and telecommunications. It can also be used in applications where single-byte instructions and data are compatible. Data stored in 32 bytes of user RAM is stored even when the main power supply is absent.

Working Principle

The PCF8593T/112 real time clock (RTC) is composed of four main components. The quartz crystal oscillator, the Real-Time Clock registers, level four instruction and clock source, and the power fail detection circuitry. The quartz crystal oscillator accumulates time information and stores it in registers provided. The registers are 32 bytes of user-RAM. The level four instruction is a built-in instruction code that allows the user to write the data or time data directly into the register and read it when needed. All the data is protected in case of a power failure, since the device has an on-chip power fail detection circuitry. When the power is restored, the data is loaded from a register to start counting.

Conclusion

The PCF8593T/112 real time clock is a very accurate and low-power device that can be used in a variety of applications where precise timing is essential. It combines two major functions: the clock of time and a calendar, as well as a timer/alarm and a programmable pulse output. In addition, its power-fail detection circuitry, extended temperature range and low power consumption make it ideal for many applications.

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