M48T128Y-70PM1

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The M48T128Y-70PM1 is a high-performance Real Time Clock (RTC) IC made by STMicroelectronics. It is used to provide accurate timekeeping data in systems and applications that require reliable timekeeping. The IC is an integrated device that combines a low-power crystal oscillator, multiple-level battery backup, a low-jitter oscillator, a non-volatile memory, and robust power supervisory features. The M48T128Y-70PM1 is capable of providing a low-jitter, low-cost alternative to other high-precision clock and timing chips. It is available in a 64-pin LQFP package.

Application and Use

The M48T128Y-70PM1 is ideal for applications that require accurate timekeeping with no need for manual adjustment. This IC provides robust power supervisory and timekeeping features, with the addition of a low-power crystal and an independent battery backup. It can be used in a wide range of applications, such as communications systems, automotive systems, medical systems, security systems, industrial systems, and other time-sensitive applications. It can also be used for financial transactions, providing reliable time and date stamps to ensure that monetary transactions are valid and secure.

Design and Working Principle

The M48T128Y-70PM1 is a complete RTC chip, with features that make it suitable for a variety of applications. The IC consists of a low-power crystal oscillator and a non-volatile memory that stores clock, date, and time information in multiple formats. The memory is divided into two main sections. The first section stores the time and date information in a binary format, while the second section stores the same information in a decimal format. The decimal format is used for time-stamping applications and allows the data to be represented in two’s complement format.

The IC also includes a low-power oscillator and multiple-level battery backup. The low-power oscillator provides an accurate 1 Hz source that is used to drive the IC\'s real-time clock (RTC) circuit. If a power failure occurs, the multiple-level battery backup ensures that the time and date information is not lost and the IC can continue running until the power is restored.

The M48T128Y-70PM1 also includes robust power supervisory features. The IC monitors and reports the power supply voltage via a reserved pin. If the supply voltage drops below a certain level, the IC enters a low-power state and shuts off the main power supplies. This allows the IC to remain functional even in the event of a power failure.

Advantages

The M48T128Y-70PM1 provides a number of advantages over other RTC chips. It is easy to use and requires minimal programming. The chip is also highly reliable, with a wide temperature range and low power consumption. The three-level battery backup also ensures that the time and date settings are retained even in the event of a power loss. The chip also features a low-jitter oscillator, which reduces any timing errors. This makes the M48T128Y-70PM1 an ideal choice for high-precision timing applications.

Conclusion

The M48T128Y-70PM1 is a reliable, high-performance RTC IC made by STMicroelectronics. It combines a low-power crystal oscillator, multiple-level battery backup, a low-jitter oscillator, and a non-volatile memory in a single device. The chip is designed for applications that require reliable timekeeping, such as communications systems, automotive systems, medical systems, security systems, and other time-sensitive applications. The chip also provides robust power supervisory features, low power consumption, and a wide temperature range, making it an ideal choice for high-precision timing applications.

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