DS17285S-5+TR

Real Time Clock Overview

The DS17285S-5+TR is a real-time clock (RTC) integrated circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It provides timekeeping and calendar functions with a multiplexed parallel interface. The device operates within a supply voltage range of 4.5V to 5.5V and includes 2KB of battery-backed non-volatile SRAM. It supports date formats including leap year correction and time formats in both 12-hour and 24-hour modes. The component is housed in a 24-SOIC package and is designed for surface-mount installation.

Real Time Clock Feature Summary

• Integrated real-time clock/calendar with one time-of-day alarm
• 2KB battery-backed non-volatile SRAM storage capacity
• Multiplexed parallel bus interface for system connectivity
• Automatic date adjustment for month length and leap years

Real Time Clock Applications

• Portable computer systems requiring persistent timekeeping
• Industrial controllers needing precise calendar tracking
• Embedded devices utilizing wake-up alarm features

Real Time Clock Procurement Notes

Verify the specific suffix designation, as standard datasheets often list the tube variant (DS17285S-5+) while the requested model specifies tape-and-reel packaging. Confirm availability status directly with the manufacturer or authorized distributors, as supply constraints may apply to this specific reel configuration.

Real Time Clock Selection Notes

Select this component when a parallel interface is required for high-speed data access compared to serial alternatives. Ensure the system design accommodates the 24-SOIC footprint and provides appropriate power sequencing for the VCC and backup supply pins to maintain SRAM integrity during power transitions.

Real Time Clock Part Context

This part belongs to the DS17x85 family of real-time clocks, which are successors to the industry-standard DS12885 series. The family shares common architectural features such as power-on control circuitry and interrupt capabilities, differing primarily in memory size and encapsulation options like DIP or SOIC packages.

Real Time Clock Replacement Considerations

Direct functional substitutes within the same family include the DS17285S-5+ (tube version) and variants with different memory capacities such as the DS17485 or DS17885 series, provided the pinout and interface compatibility remain consistent with the host system design.