STMicroelectronics M48T35Y-70MH1F Timekeeper SRAM

The M48T35Y-70MH1F is a high-performance 256 Kbit (32K x 8) Timekeeper SRAM designed by STMicroelectronics. This integrated device combines a binary counter, a quartz crystal, and a battery to ensure that timekeeping and memory functions are maintained even when the main power is lost. The product is particularly suitable for applications requiring reliable data retention and precise timekeeping, such as in industrial control systems, telecommunications, and network equipment.

The SRAM operates at a voltage range of 4.5V to 5.5V, and the access time of 70ns allows for rapid data retrieval, making it an efficient choice for systems with stringent performance requirements. The M48T35Y-70MH1F features a self-contained battery and crystal within the encapsulated package, which ensures a long lifespan and stable operation over the product's lifetime.

The device is designed with a precision power-fail de-select circuit which, upon detection of a power failure, automatically switches to the battery supply, thus preserving the integrity of the data stored in the SRAM. The timekeeping function is maintained for over 10 years in the absence of power, thanks to the low-power design and the included lithium battery.

Integration features of the M48T35Y-70MH1F include a programmable alarm output active in battery-backup mode, which provides additional functionality for system power management. The Watchdog Timer is another key feature, which can be used to reset a system if the software fails to operate properly.

For ease of integration, the M48T35Y-70MH1F is packaged in a 28-pin, 600 mil DIP (Dual In-line Package) and is fully RoHS compliant. Its compatibility with JEDEC standard pinouts allows for easy replacement and design in without the need for significant board changes.

Overall, the M48T35Y-70MH1F from STMicroelectronics is a robust and reliable timekeeping SRAM solution that meets the demands of various time-sensitive and data-critical applications.