STMicroelectronics M48T12-150PC1 Timekeeper SRAM

The M48T12-150PC1 is a 5.0 V, 16 Kbit (2Kb x 8) Timekeeper SRAM designed by STMicroelectronics. It integrates a highly reliable, low-power SRAM with a battery-backed real-time clock (RTC) in a single package. This unique combination allows for the protection of data during power loss or system downtime, making it an ideal choice for a wide range of applications in industrial, telecommunications, and automotive systems, where the integrity of data and precise timekeeping are critical.

The M48T12-150PC1 is encapsulated in a 24-pin, 600 mil DIP (Dual In-line Package) which provides a familiar interface for easy integration into existing designs. The device operates with a supply voltage range of 4.75 to 5.5 volts, and the access time of 150 ns ensures fast data retrieval and storage, which is essential for high-performance systems.

One of the key features of this product is its integrated, long-life lithium battery, which ensures that the clock continues to run and the SRAM retains data for over 10 years in the absence of power. The RTC provides seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to the year 2100. An additional feature includes an alarm wakeup function, which can be set to a specific moment in time, thus providing an interrupt to the host system.

The device's clock accuracy is maintained within the industrial temperature range of -40°C to +85°C. This robust temperature range, along with the low power consumption and integrated crystal, makes the M48T12-150PC1 a reliable and self-contained memory and timing solution.

For ease of integration, the M48T12-150PC1 also provides a programmable interrupt output and a software-controlled write protection mechanism for the clock and SRAM, ensuring additional data security. With its combination of volatile and non-volatile elements, the M48T12-150PC1 is a versatile component for maintaining data integrity and providing precise timekeeping in electronic systems.