DS1248Y-70IND+

Overview

The DS1248Y-70IND+ is a nonvolatile SRAM integrated with a phantom clock, manufactured by Analog Devices Inc./Maxim Integrated. It provides 128K x 8 bits of memory and operates within a supply voltage range of 4.5V to 5.5V. The device features a parallel interface and utilizes a 32-EDIP package for through-hole mounting. It supports time formats including HH:MM:SS:hh in both 12-hour and 24-hour modes, alongside a YY-MM-DD-dd date format. Designed for industrial applications, it functions reliably between -40°C and +85°C.

Feature Summary

• Integrates 128K x 8 NV SRAM with a phantom clock for real-time tracking
• Includes an embedded lithium energy cell for data retention exceeding 10 years
• Features automatic leap year compensation valid up to the year 2100
• Supports transparent watch function operation without interrupting RAM access

Applications

• Industrial systems requiring precise timekeeping and persistent data storage
• Embedded controllers needing nonvolatile memory replacement for volatile SRAM or EEPROM
• Equipment operating in extended temperature environments (-40°C to +85°C)

Procurement Notes

Verify that the specific part number matches the required voltage and temperature specifications. Confirm the package type corresponds to the intended PCB layout. Ensure compliance with relevant environmental regulations such as RoHS standards before finalizing procurement decisions.

Selection Notes

Select this component when a parallel interface is required for direct memory replacement. Consider the 32-EDIP package constraints for through-hole assembly processes. Evaluate the power supply stability to ensure it remains within the 4.5V to 5.5V operational range during all system states.

Part Context

This component belongs to the DS1248 series, which combines nonvolatile memory with timekeeping capabilities. It serves as a drop-in replacement for standard static RAM in systems where data persistence across power cycles is critical. The phantom clock mechanism allows time updates via serial bit patterns over the standard data bus.

Replacement Considerations

Pin-for-pin compatible with DS1244P and DS1251P. Verify that the host system supports the 64-bit pattern recognition sequence required to access the phantom clock registers.