The DS1747P-70+ from Maxim Integrated is a high-performance, non-volatile timekeeping RAM that combines a full-featured real-time clock (RTC) with an embedded crystal and SRAM. This integrated solution offers a robust and convenient way to maintain accurate time and date information, alongside user data storage, even when the main power supply is turned off.

Key Features

• Integrated Real-Time Clock: The device features a fully integrated RTC with a built-in crystal oscillator for high precision and minimal drift over temperature and time.
• Year 2000 Compliant: The RTC is Y2K-compliant, with automatic leap year correction and date management up to the year 2100, ensuring long-term reliability.
• Non-Volatile SRAM: With 64kB of non-volatile static RAM, the DS1747P-70+ ensures data retention without the need for an external battery. This is achieved through an energy-efficient, lithium coin-cell battery that is integrated within the package.
• Power Management: The device features a power-fail write-protection circuit that automatically switches to the battery when power is interrupted, ensuring data integrity.
• Accessible Memory: The SRAM is directly accessible in a byte-wide configuration, making it easy to integrate with most microprocessor systems.
• Surface-Mount Package: The DS1747P-70+ comes in a PowerCap Module (PCM) package, which is suitable for surface mounting and provides a compact footprint for space-constrained applications.

Applications

The versatility of the DS1747P-70+ makes it an ideal choice for a wide range of applications where reliable timekeeping and data storage are critical. It is particularly suited for:

• Embedded systems
• Utility meters
• Industrial time clocks
• POS terminals
• Network hardware

Technical Specifications

The DS1747P-70+ operates over a voltage range of 2.7V to 3.6V and features a 70ns access time. Its robust design ensures operation across a wide temperature range of -40°C to +85°C, making it reliable in various environmental conditions.

For further information, please refer to the datasheet or contact Maxim Integrated's support team for technical assistance.