Maxim Integrated DS1746W-120+ Overview

The DS1746W-120+ is a high-quality, versatile memory module from Maxim Integrated that combines a full-featured real-time clock/calendar (RTC) with a 128k x 8 nonvolatile static RAM and a power-fail control circuit. Designed to address the needs of embedded systems requiring reliable timekeeping and data storage with battery backup, this product is an ideal solution for a broad range of applications.

Key Features

• Real-Time Clock/Calendar: The DS1746W-120+ maintains seconds, minutes, hours, day, date, month, and year information with automatic leap year compensation up to the year 2100. The clock/calendar provides a high level of timekeeping accuracy and reliability.
• Nonvolatile SRAM: With its 128k x 8 nonvolatile static RAM, users can store critical data that will not be lost when the system power is removed. The integration of nonvolatile elements ensures data retention without the need for an external battery.
• Power-Fail Control: The module includes an automatic power-fail chip deselect and write protection feature, ensuring data integrity during power transitions.
• Battery Backup: The DS1746W-120+ is equipped with an integrated lithium energy source that ensures data and clock/calendar retention for over 10 years in the absence of external power.
• Watchdog Timer: A programmable watchdog timer is included to provide an additional layer of data protection by resetting the system in case of a software lock-up.
• Accessible Timekeeping Registers: The device's timekeeping registers are fully accessible in the same memory space as the SRAM, allowing for easy integration into the system.
• Surface-Mount Package: The module is available in a surface-mount package, making it suitable for automated assembly processes and saving valuable board space.

Applications

The DS1746W-120+ from Maxim Integrated is designed for systems where durable and accurate timekeeping is crucial. It is commonly used in telecommunications, industrial systems, embedded systems, utility meters, and other applications where maintaining accurate time and securing data is critical.

With its robust feature set and reliable performance, the DS1746W-120+ provides a compact, energy-efficient solution for designers looking to incorporate timekeeping and nonvolatile data storage into their systems without compromising on quality or functionality.