Product Overview: DS1743W-120+ from Maxim Integrated

The DS1743W-120+ is a high-performance, full-function, year-2000-compliant (Y2K) real-time clock/calendar (RTC) with a built-in 32.768kHz crystal oscillator. Manufactured by Maxim Integrated, a leader in the development of integrated circuits, this RTC is designed for a wide range of applications requiring timekeeping and data storage capabilities.

Key Features

• Integrated Power Source: The DS1743W-120+ comes with a self-contained battery and crystal, which means there is no need for external components, facilitating design simplicity and reliability.
• Nonvolatile Timekeeping: This RTC maintains seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation up to the year 2100. Its nonvolatile nature ensures that timekeeping continues even when the main power is lost.
• Memory: In addition to timekeeping, the device features a 128k x 8 nonvolatile static RAM for data storage, which is also maintained during power loss.
• Watchdog Timer: A programmable watchdog timer is included to reset a hung system and ensure proper operation, enhancing the system's reliability.
• Power Conservation: The DS1743W-120+ has a power-fail deselect feature that automatically switches to the battery supply during power failures, minimizing power consumption.
• Surface-Mount Package: Its surface-mountable encapsulation allows for efficient use of board space and is compatible with modern PCB assembly processes.

Applications

With its robust timekeeping and data retention capabilities, the DS1743W-120+ is ideal for applications such as:

• Embedded systems
• Utility meters
• Industrial time clocks
• POS terminals
• Network hardware (routers, switches, servers)

Technical Specifications

• Voltage Range: 4.5V to 5.5V
• Operating Temperature: 0°C to +70°C
• Package Type: PowerCap Module (PCM)
• Dimensions: 34.04mm x 24.38mm x 7.80mm

The DS1743W-120+ from Maxim Integrated is a reliable and versatile choice for systems that require accurate timekeeping and data storage without the need for an external battery or crystal.