DS1218S+T&R

Controllers Overview

The DS1218S+T&R is a nonvolatile RAM controller IC in an 8-SOIC package. It converts CMOS RAM into nonvolatile memory by monitoring the VCCI supply for out-of-tolerance conditions. When power fails, it automatically switches to a battery connected to the VBAT pin and unconditionally write-protects the RAM. The device operates with a VCCI range of 4.5V to 5.5V and consumes less than 100nA of battery current.

Controllers Feature Summary

• Converts standard CMOS RAM into nonvolatile memory
• Automatically switches to battery backup upon power failure
• Unconditionally write protects when supply voltage is out of tolerance

Controllers Applications

• Battery-backed nonvolatile memory systems
• Data retention applications requiring low standby current
• Embedded systems needing power-fail protection

Controllers Procurement Notes

Verify that the T&R suffix indicates tape-and-reel packaging. Confirm RoHS compliance status as indicated by the plus sign. Check component obsolescence status before procurement planning.

Controllers Selection Notes

Select this controller when integrating external full CMOS SRAM requires nonvolatile functionality. Ensure the host system provides a stable 5V logic supply and compatible lithium battery voltage within the specified operating temperature range.

Controllers Part Context

This component belongs to the DS1218 series of nonvolatile controllers manufactured by Analog Devices Inc./Maxim Integrated. It is designed to work with external CMOS RAM chips to create compact, space-saving nonvolatile memory solutions.

Controllers Replacement Considerations

DS1218S+