Analog Devices Inc./Maxim Integrated Tariff Inquiry

DS1743-100+

DS1743-100+ Description

The DS1743-100+ is an obsolete but robust Real-Time Clock (RTC) and Calendar IC from Analog Devices Inc./Maxim Integrated, designed for precision timekeeping in embedded systems. This parallel-interface device integrates an 8KB NVSRAM (Non-Volatile SRAM) with a clock/calendar function, ensuring data retention during power loss. Operating within a 4.5V to 5.5V supply range, it consumes a maximum of 3mA @ 5V during timekeeping, making it suitable for low-power applications. The RTC supports a 24-hour format (HH:MM:SS) and includes leap year compensation and Y2K compliance, ensuring long-term accuracy. Housed in a 28-pin EDIP (Through Hole) package, it is RoHS3 compliant but classified as REACH Affected.

DS1743-100+ Features

• Integrated NVSRAM: Combines 8KB of non-volatile memory with RTC functionality, eliminating the need for external backup batteries.
• High Accuracy: Features leap year and Y2K support for reliable long-term timekeeping.
• Low Power Consumption: 3mA max current at 5V ensures energy efficiency.
• Wide Voltage Range: Operates from 4.5V to 5.5V, compatible with standard 5V systems.
• Parallel Interface: Simplifies integration with legacy microcontrollers and systems.
• Industrial Temperature Range: Functions reliably in 0°C to 70°C environments.
• Obsolete but Reliable: While no longer in production, it remains a trusted solution for legacy designs.

DS1743-100+ Applications

• Industrial Automation: Ideal for programmable logic controllers (PLCs) and data loggers requiring time-stamped events.
• Legacy Embedded Systems: Suitable for retrofit designs where parallel interfaces are preferred.
• Medical Equipment: Used in patient monitoring systems for accurate time/date logging.
• Telecommunications: Ensures precise timing in network switches and routers.
• Automotive Diagnostics: Provides timestamped error logs in older diagnostic tools.

Conclusion of DS1743-100+

The DS1743-100+ offers a unique combination of NVSRAM and RTC functionality, making it a versatile choice for systems requiring non-volatile timekeeping. Its parallel interface, low power consumption, and industrial-grade reliability make it well-suited for legacy industrial, medical, and telecom applications. While obsolete, its Y2K compliance and leap year support ensure long-term accuracy, solidifying its role in time-critical embedded systems. Engineers seeking a proven, all-in-one timekeeping solution for 5V designs may still find value in this IC.