Maxim Integrated DS1743E-3 Nonvolatile Timekeeping RAM

The Maxim Integrated DS1743E-3 is a high-performance, 3.3V nonvolatile timekeeping RAM that combines a full-featured real-time clock (RTC) with an NV SRAM data storage solution. This device is designed to maintain accurate time and date information, as well as to preserve user data even when the main power supply is compromised, making it an ideal component for a wide range of applications, including industrial control systems, utility meters, and medical devices.

The DS1743E-3 integrates 64KB of static RAM with a built-in lithium energy source and a quartz crystal, which ensures that timekeeping and data retention are maintained for over 10 years in the absence of external power. The RTC provides a full binary-coded decimal (BCD) clock calendar that is accessible via a simple multiplexed byte-wide interface. The clock calendar features include seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to 2100.

One of the key features of the DS1743E-3 is its power-fail deselect circuitry, which automatically switches to the battery supply when a power failure is detected, ensuring data integrity and clock functionality. The device also includes a write protection mechanism that prevents inadvertent writes to the clock or memory during power transitions.

For ease of integration, the DS1743E-3 is housed in a JEDEC standard 28-pin 600-mil DIP package, making it compatible with existing socket specifications and easy to implement in a variety of board layouts. Its low power consumption is an added advantage for battery-powered or energy-sensitive systems.

Overall, the Maxim Integrated DS1743E-3 provides a reliable and durable solution for systems requiring nonvolatile memory and precise timekeeping. Its robust feature set and straightforward interface make it a go-to choice for engineers looking to enhance the reliability and functionality of their electronic products.

Key Features:

• 64KB Nonvolatile SRAM
• Integrated Real-Time Clock (RTC)
• Automatic Power-Fail Chip Deselect and Write Protection
• Over 10 Years of Data Retention and Timekeeping in the Absence of Power
• Simple Multiplexed Byte-Wide Interface
• BCD Clock Calendar with Leap Year Compensation
• Low Power Consumption
• JEDEC Standard 28-Pin DIP Package