M48T02-150PC1

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Real time clocks (RTCs) are devices used to accurately track and keep time. They are commonly used in areas such as communications, computing, and time and frequency control. The M48T02-150PC1 is a real time clock (RTC) from STMicroelectronics. The device combines an integrated clock oscillator, an SRAM for user data storage, and a host of features in a tiny Quad Flat Pack package.

The M48T02-150PC1 RTC provides a wide range of memory, with a 32K x 8-bit SRAM, organized as two address blocks: a low address block (0-7FFFh) and a high-address block (8-FFFFh). Data stored in the SRAM can be accessed or written either serially or in parallel, making it very flexible in terms of usage. The device also features a number of real-time clock features, including 32KHz clock oscillator, 2-wire control for time and date setting, an integrated watchdog timer, and an interrupt output.

The M48T02-150PC1 RTC can be used in applications across a wide range of industries, including automotive, medical, industrial, consumer and handheld electronics. The device is well suited for time tracking and timing synchronization applications, such as in industrial automation and telecommunications, where accuracy and reliable performance are critical.

The M48T02-150PC1 RTC is based on a quartz crystal oscillator, which helps maintain accurate timekeeping even over long periods of time. The device is designed to operate with very little power, consuming only 1.25mA and 0.9mA at 5V and 3V supplies, respectively. This makes it an ideal choice for battery-powered applications.

The working principle of the M48T02-150PC1 RTC is quite simple. A quartz crystal oscillator is used to generate a square wave of a set frequency, typically 32KHz. This signal is then divided down into several divided clocks for timekeeping, like seconds, minutes and hours. The RTC includes a programmable counter and a calendar that can store up to 32 characters of user information. This information is read from and written to the SRAM of the device.

The M48T02-150PC1 RTC also includes watchdog timer, which can be programmed to reset the RTC clock if the main system fails to produce a regular pulses. The interrupt output is triggered whenever a predefined alarm condition (alarm time, alarm date, etc) is met.

To sum up, the M48T02-150PC1 real-time clock is a highly reliable, low-power device that offers a wide range of memory and functions, making it an ideal solution for a variety of timekeeping, synchronization and control applications. The crystal oscillator ensures accuracy while the interrupt output and watchdog timer provide additional safety and protection.

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