STMicroelectronics M48T35AY-70MH1 Timekeeper SRAM

The M48T35AY-70MH1 is a 256 Kbit (32K x 8) Timekeeper SRAM designed by STMicroelectronics, which integrates a wealth of features to provide a reliable and efficient memory and real-time clock solution for a wide array of applications. It operates at a speed of 70ns, offering a fast access time for high-performance systems.

This Timekeeper SRAM combines a high-performance CMOS static RAM with a lithium battery and a quartz crystal to maintain accurate timekeeping when the main power to the device is interrupted. The encapsulation of the battery and crystal within the package ensures long-term reliability and stability of the timekeeping function.

The M48T35AY-70MH1 is specifically designed to be pin compatible with JEDEC standard 32K x 8 SRAMs, making it a drop-in replacement for systems requiring a non-volatile memory with an integrated real-time clock (RTC). The device features a byte-wide interface, allowing for easy integration into a variety of system architectures.

Key features of the M48T35AY-70MH1 include:

• Integrated Power-Fail Detect: This feature ensures that the transition to battery mode is clean and immediate, preserving data integrity during power loss.
• Automatic Write-Protection: When Vcc is below a certain threshold or during power-down, write operations are inhibited to prevent data corruption.
• Real-Time Clock: The built-in RTC provides seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation up to the year 2100.
• Low Power Consumption: Designed for energy efficiency, the M48T35AY-70MH1 minimizes power draw, especially in battery-backup mode.
• Self-Contained Battery and Crystal: The integration of the battery and crystal within the module ensures a compact footprint and simplifies the design process.

With its robust design and comprehensive feature set, the M48T35AY-70MH1 from STMicroelectronics is an ideal choice for applications that require a dependable non-volatile memory with an RTC, such as industrial control systems, utility meters, and other embedded systems. Its reliability and convenience make it a popular choice among designers looking for a turnkey solution to address both memory and timekeeping requirements in their products.