DS1250Y-70IND+

Memory IC Overview

The DS1250Y-70IND+ is a 4Mbit Nonvolatile SRAM organized as 524,288 words by 8 bits. It features a parallel interface with an access time of 70ns and operates within a voltage range of 4.5V to 5.5V. The device utilizes a 32-pin EDIP package and supports an industrial temperature range from -40°C to +85°C. It includes an integrated lithium energy source for data retention and automatically switches to battery backup during power loss.

Memory IC Feature Summary

• Automatically protects data during power loss by switching to an internal lithium energy source
• Provides unlimited write cycles without requiring additional support circuitry
• Maintains data integrity for a minimum of 10 years in the absence of external power
• Replaces standard volatile static RAM directly using a JEDEC-standard pinout

Memory IC Applications

• Replacing existing 512k x 8 volatile static RAMs in embedded systems
• Storing critical configuration data that requires persistence across power cycles
• Industrial control applications requiring extended temperature operation
• Microprocessor interfacing where non-volatile storage is necessary

Memory IC Procurement Notes

Verify the specific IND suffix confirms the industrial temperature range (-40°C to +85°C) and the Y suffix indicates the ±10% VCC operating tolerance. Confirm the package type matches the required 32-pin EDIP form factor. Ensure compatibility with the system's 5V logic levels and check for any end-of-life status updates from Analog Devices or Maxim Integrated before finalizing procurement plans.

Memory IC Selection Notes

Select this component when a direct drop-in replacement for 512k x 8 SRAM is needed with non-volatile capabilities. The DS1250Y variant offers a wider supply voltage tolerance compared to the DS1250AB. Consider the PowerCap Module (PCM) package if surface-mount assembly is preferred over through-hole DIP installation. Ensure the application does not require negative undershoots on pins during battery backup mode.

Memory IC Part Context

This part belongs to the DS1250 family of 4096k Nonvolatile SRAMs manufactured by Analog Devices Inc./Maxim Integrated. The family includes variants with different speed grades, temperature ranges, and packaging options such as the standard EDIP and the surface-mountable PowerCap Module. These devices are designed to simplify the integration of non-volatile memory into microprocessor-based designs.

Memory IC Replacement Considerations

Direct substitutes include other parts within the DS1250 family, such as the DS1250Y-100IND+ which shares the same package and organization but has a slower 100ns access time.