DS1284Q+

Overview

The DS1284Q+ is a Real-Time Clock (RTC) integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It provides clock/calendar functionality with a parallel interface and is housed in a 28-PLCC package. The device operates on a main supply voltage of 4.5V to 5.5V, consuming a maximum current of 7mA at 5V during timekeeping. A backup battery input supports voltages between 2.4V and 3.5V to maintain data retention. It includes 50 bytes of SRAM for non-volatile storage.

Feature Summary

• Integrated clock/calendar with HH:MM:SS:hh (12/24 hr) and YY-MM-DD-dd formats
• Includes alarm, leap year compensation, square wave output, and watchdog timer
• Features 50 bytes of SRAM for system use
• Parallel interface for microcontroller connectivity

Applications

• Telecommunications equipment requiring precise time stamping
• Industrial control systems needing reliable calendar tracking
• Data logging devices utilizing the internal SRAM

Procurement Notes

Verify component status as discontinued. Confirm RoHS compliance status from official documentation, as local sources may vary. Ensure compatibility with existing 28-PLCC footprints and parallel bus requirements before procurement.

Selection Notes

Select this part for applications requiring a dedicated RTC with parallel interface and onboard SRAM. Ensure power supply rails match the 4.5V–5.5V range. Consider the 0°C to 70°C operating temperature range against environmental conditions.

Part Context

This component belongs to the DS1284 family of real-time clocks. It shares functional similarities with other Maxim Integrated RTCs but is distinguished by its specific parallel interface and 50-byte SRAM capacity within a 28-pin PLCC package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.