Clocks and timers

ST offers a wide portfolio of clocks and timers, including legacy timers as well as parallel- and serial-interface real-time clock (RTC) ICs. These devices provide best-in-class performance for accuracy and ultra-low power consumption to address communication, networking, industrial and battery-powered applications.

Why use a standalone RTC?

A standalone real-time clock (RTC) offers significantly higher performance than an embedded RTC in the standard MCU. With a standalone RTC, an application consumes roughly 3 times less, compared to a standard MCU used to retain time. This is important in systems powered by coin cells or disposable batteries.
In a system powered by disposable batteries, a standalone RTC can keep the time using a small capacitor, when the battery is being replaced. An RTC can also be connected directly to the battery and provide all the functionalities using limited space on the PCB also improving the system security and safety.

Real-time clock ICs, Standalone RTC, Embedded RTC, M41T83, Battery and Crystal, Timers

Product types:

Real-time clock (RTC) ICs
An extended range of products are available, including ultra-low power devices, standard package with embedded crystal, and ST’s SNAPHAT with lithium battery and crystal integrated. RTC functions include alarm management, battery switchover, reset, and special features such as time stamp, antitamper for secure applications.
ST offers low-power timers, in single and dual versions. These are highly stable monolithic circuits, generating accurate time delays or oscillations designed in CMOS technology.

The industry-standard frequency generators are circuits designed in bipolar technology, low frequency and with high power consumption, while ST low power products are designed in CMOS technology, low power and low consumption and they can reach high frequency operation up to 2.7 MHz.