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Rochester Electronics DS1746-70 Environmental and export classification status description

Overview of Maxim Integrated DS1746-70: The DS1746-70 is a real-time clock (RTC) with an integrated battery backup memory designed by Maxim Integrated. This device provides a way to manage timekeeping in systems that require accurate timing and date information, especially in scenarios where power loss might occur. The DS1746-70 features a digital calendar with leap year compensation, a watchdog timer, and a variety of programmable timekeeping functions. Functions: - Real-Time Clock: Maintains current time and date (including hours, minutes, seconds, year, month, and day). - Battery Backup: Utilizes a backup battery that allows timekeeping even when the main power supply is lost. - Memory Integration: Has a built-in NV SRAM (non-volatile SRAM) of 64 Kbits, which can be used to store important data. - Alarm Functionality: Configurable alarms can be set to trigger at certain times. - Timer Functions: Includes programmable timers and counters to perform timing functions. - Watchdog Timer: Prevents system lock-up by resetting the system if software fails to reset the timer. Applications: - Consumer Electronics: Used in devices like watches, clocks, and appliances that require accurate timekeeping. - Industrial Control Systems: Helps maintain scheduled operations and system monitoring. - Computer Systems: Employed in PCs and workstations for time maintenance and scheduling. - Communication Equipment: Used in devices requiring precise timing for data transmission. - Security Systems: Provides timestamps for logs and alarms. Alternative Components: - Microchip MCP7940N: Another RTC with EEPROM memory; features an I2C interface and battery backup. - NXP PCF8563: A low-power RTC with programmable alarms and a timekeeping function tailored for power-sensitive applications. - STMicroelectronics M41T62: Offers similar timing functionalities but features different memory sizes. - Silicon Labs Si5351: Not strictly an RTC but is used for timing applications, particularly in clock generation for RF and communication devices. Embedded Modules: - RTC Modules for Arduino: Many modules like the DS1307 or DS3231 are available as pre-built boards that can easily interface with microcontrollers and development platforms. - Raspberry Pi RTC Module: Various third-party RTC modules are available for the Raspberry Pi to maintain real-time clock functionality during power outages. Related Q&A: 1. Q: What type of power supply and backup battery does the DS1746-70 require? A: The DS1746-70 operates with a standard power supply (2.0V to 5.5V) and requires a backup battery (typically a coin cell) to maintain time during power outages. 2. Q: Can the DS1746-70 be programmed to trigger alarms? A: Yes, the DS1746-70 has configurable alarm settings that allow it to trigger specific actions at designated times. 3. Q: What is the type of memory used in the DS1746-70, and how does it work? A: The DS1746-70 uses built-in non-volatile SRAM that retains data even when the power is turned off, thanks to the backup battery. 4. Q: How accurate is the timekeeping in the DS1746-70? A: The DS1746-70 is designed for accuracy with a typical timekeeping error of ±2 minutes per month at 25°C. 5. Q: What is the significance of the watchdog timer feature in the DS1746-70? A: The watchdog timer is crucial for system reliability; it resets the system if it fails to refresh the timer, helping prevent unexpected system lock-ups. This overview and accompanying information should provide you with a comprehensive understanding of the DS1746-70 and its role in various applications.